Handheld Optical Power and Energy Meter Console with Multi-Touch Technology


  • Projected Capacitive Touchscreen with Color Display
  • Over 35 Compatible Optical Power and Energy Sensors
  • Supports Spectral Calibration and Attenuation Correction
  • Inputs for Temperature and Humidity Sensors

PM400

Touchscreen Power
and Energy Meter Console

The PM400 allows power or energy measurements and temperature data to be recorded, saved, and analyzed at a later time. The graphs can be zoomed and scrolled using multi-touch gestures.

Related Items


Please Wait
PM400 Power Meter Consolea
Compatible Sensors Photodiode Power,
Thermal Power,
Thermal Position & Power,
and Pyroelectric Energyb
Optical Power Rangec 100 pW to 200 W
Optical Energy Rangec 10 µJ to 15 J
Max Repetition Ratec 3 kHz
Available Sensor Wavelength Rangec 185 nm - 25 μm
Display Refresh Rate 10 Hz (Numerical)
25 Hz (Analog Simulation)
Bandwidthc DC - 100 kHz
  • See the Specs tab for complete console specifications.
  • The PM400 console is compatible with all Thorlabs' C-Series Pyroelectric Energy Sensors except the ES408C Fast Pyroelectric Energy Sensor.
  • Sensor Dependent
Power Meter Selection Guide
Sensors
Photodiode Power Sensors
Thermal Power Sensors
Thermal Position & Power Sensors
Pyroelectric Energy Sensors
Power Meter Consoles and Interfaces
Digital Handheld Console
Analog Handheld Console
Touchscreen Handheld Console
Dual-Channel Benchtop Console
USB Interfaces with External Readout
Complete Power Meters
Power Meter Bundles
Wireless Power Meters with Sensors
Compact USB Power Meters
Field Power Meters for Terminated Fibers

Features

  • Compact Digital Power Meter Console
  • For CW and Pulsed Source Detection
  • Inputs for Temperature and Humidity Sensors
  • Save and Apply User-Provided Spectral Calibration and Attenuation Correction Files
  • Touchscreen Display with Multi-Touch Technology
  • USB 2.0 Interface for Remote Control, Data Transfer, and Charging
  • Long-Life Internal Li-Polymer Battery
  • Up to 10 Hours of Battery-Powered Operation between Charging
  • Compatible with TSP-TH Temperature Probe
  • Sensor Upgrade and Recalibration Services Available
  • Optical Power Monitor PC Software Available (See Software Tab for Details)

The PM400 console is designed to be used with Thorlabs' power, position & power, and energy sensors to measure the optical power of laser light, other monochromatic, or near monochromatic light sources or the energy of pulsed light sources. The projected capacitive touchscreen uses multi-touch technology, allowing data displays to be zoomed and scrolled with hand gestures. Capacitive touch buttons on the front of the unit enable fast access to set the source wavelength or spectrum, a delta mode that shows the change in power from a user-selected set point, the zeroing function, and device main menu. The touchscreen is sensitive enough that it can be operated while wearing latex, nitrile, or cotton gloves. The screen is also backlit and can be dimmed to 1% of the maximum brightness.

Touchscreen Power Meter
Click to Enlarge
Figure 1.1  The PM400 features a variety of input ports for compatible optical sensors and temperature sensors, as well as a 14-pin auxiliary input for custom applications.

In the simplest operating mode, power and energy measurements can be viewed with a simulated analog needle or numerical display. Alternatively, data can be logged over time and saved to the device's internal memory. A graph display allows the user to examine and analyze the results with multi-touch enabled zoom and scrolling features, while a statistics display allows the user to program and analyze a sequence of measurements. In addition to pre-programming source wavelengths or spectra for calibrating their measurements, users can also enter and save up to twelve attenuation values or data files to correct for effects that external devices (such as filters or beamsplitters) may have on the power measurement. Measured data, calibration information, and attenuation curves can all be saved to the unit's internal 4 GB flash memory. The user can modify and copy the files saved to internal memory by connecting the unit to a PC via the USB port.

The PM400 console is compatible with more than 35 photodiode, integrating sphere, fiber, thermal, and pyroelectric sensors designed for use from the UV to the Mid-IR, available below. The Sensor Selection tab offers a comparison of the operating wavelengths and power or energy ranges for each sensor. Thorlabs' compatible C-series sensors can be hot-swapped when used with the PM400 console. The sensor connector contains the sensor information, including NIST-traceable responsivity curves, sensor types, and model numbers, which the PM400 uses to produce calibrated power measurements. These details can be shown on the sensor information display screen of the PM400. Alternatively, the console can be connected to compatible third-party and custom sensors via either the female DB9 connector or the 14-pin auxiliary input (see the Specs and Pin Diagrams tab for sensor compatibility information).

An external humidity sensor or combined humidity/temperature sensor unit can be connected via the 14-pin auxiliary input (see the Pin Diagrams tab). This input also provides access to the four programmable I/O ports for controlling shutters, interlock devices, laser warning lights, and other common lab devices. Alternatively, a 2.5 mm stereo (3P) jack accepts the TSP-TH thermistor temperature probe, as shown in Figure G1.1.

A 3.5 mm mono audio (2P) jack provides a 0 to 2 V analog signal that corresponds to the ratio of the measured value to the full scale value; a BNC adapter for this jack is included so that the output can be easily viewed using an oscilloscope or other device.

Data can also be recorded via the USB PC connection and optical power monitor software. This software is capable of handling up to eight consoles simultaneously. The features of the PC control software are highlighted in the Software tab.

As the PM400 uses a projected capacitive touchscreen, the outer surface is glass that can be easily cleaned with any common screen cleaning fluid.

To view the full range of Thorlabs' power and energy meter consoles, please refer to the Console Selection tab.

Sensor Upgrade Service
Thorlabs' current line of C-Series sensors and power meter consoles are not compatible with old power meter consoles and sensor heads, respectively. We offer a sensor upgrade service if you want to use your existing sensors with a new power meter console. Note: upgraded sensors will be incompatible with old power meter consoles and new sensors converted to work with older consoles will not be compatible with the PM400. Please contact our Tech Support team for details.

Recalibration Services
Recalibration services are available for our power sensors, energy sensors, and consoles. We recommend that your Thorlabs sensor and console be recalibrated as a pair; however, each may be recalibrated individually. All of the sensors on this page come with a manufacturer calibration by default, but we also offer an ISO17025 accredited calibration for some items. For more information on calibration options, please see the Recalibration tab or the calibration sections at the bottom of this page. Recalibration of a thermal position sensor can be requested by contacting Tech Support.

Table 2.1  Specifications
Compatible Detectors Thorlabs' C-Series Photodiode, Thermal Power, Thermal Position & Power, and Pyroelectric Sensors (Except Item # ES408C)
Photodiodes up to 5 mA, Thermopiles up to 1 V, and Pyroelectric Detectors up to 100 V
See Table 2.2 for Additional Details
Display
Type 4.3" TFT, WQVGA, 400 x 272 Pixels, 16 Bit Color
Viewing Area 95 mm x 54 mm
Update Rate (Max) 10 Hz Numerical, 25 Hz Analog Simulation
Format Numerical, Bar Graph, Trend Graph, Statistics, and Simulated Analog Needle
Backlight LED, Adjustable
Features Projected Capacitive Touchscreen and Buttons, Support Stand, Rubberized Outside,
2 x M3 Threaded Inserts for Mounting on Back Side
Analog Output
Connector 3.5 mm Mono Audio (2P) Jack, Adapter to BNC Included
Signal Amplified Input Signal - Not Corrected
Voltage Range 0 to 2 V
Accuracy ±3%
Bandwidth Up to 100 kHz, Dependent on Sensor and Settings
Auxiliary Input/Output
Connector 2 x 7 Pins, 0.1" Socket, Top Side
Function 4 x GPIO
2 x 10 bit ADC for External Temperature, Relative Humidity Sensor
+3.3 V, +/- 2.5 V (100 mA Max)
Temperature Sensor Internal to C-Series Optical Sensora
Temperature Sensor Type Thermistor
Temperature Measurement Range -10 °C to 80 °C
External Temperature Sensor
Supported Temperature Sensor Thermistor NTC 0.1 - 100 kΩ, B-Value 1000 - 9999 K
Temperature Measurement Range -10 °C to 80 °C (with TSP-TH)
Connector 2.5 mm Stereo Audio (3P) Jack
Sound
Type Internal Speaker
Function Laser Tuning Support, Console Function Support
Memory
Type NAND Flash
Size 4 GB
Interfaces
Type USB 2.0
Connector Mini-B USB
Power Management
Battery LiPo 3.7 V 2600 mAh
Charger Built In; Charging Current: 0.5 / 1 A
Power Connector Mini USB
General
Operating Temperature Rangeb 0 to 40 °C
Storage Temperature Range -40 to 70 °C
Dimensions 136 mm x 96 mm x 29 mm
Weight 0.35 kg
  • Many of Thorlabs' compatible C-Series optical power and energy sensors have a built-in temperature sensor.
  • Non-Condensing

 

Table 2.2  Sensor Compatibility
Sensor Type Photodiode Power Sensors Thermal Power Sensors
Thermal Position & Power Sensors		 Pyroelectric Energy Sensorsa
Input Type Current Voltage Voltage
Connector (on PM400) Female DB9
Units W, dBm, W/cm², A W, dBm, W/cm², V J, J/cm², W, W/cm², V
Measurement Ranges 6 Decades;
50 nA, 500 nA, 5 µA, 50 µA, 500 µA, 5 mA
Ranges Selectable in W
(Sensor Dependent)		 9 Ranges:
2, 4, 10, 20, 40, 100, 200, 400, 1000 mV
Ranges Selectable in W
(Sensor Dependent)		 4 Ranges:
200 mV, 2V, 20 V, 100 V
Ranges Selectable in J
(Sensor Dependent)
Display Resolution 1 pA / Responsivity Value (A/W) 1 μV / Responsivity Value (V/W) 100 μV / Responsivity Value (V/J)
AD Converter 16 bit
Accuracy ±0.2% Full Scale (5 μA - 5 mA)
±0.5% Full Scale (50 nA)		 ±0.5% Full Scale (10 mV - 1 V)
±1% Full Scale (2 mV)		 ±0.5% Full Scale
Bandwidth DC - 100 kHz, Dependent on Sensor and Settings N/A
Trigger Threshold N/A N/A 3% - 90% Full Scale
Time Constant
Correction Range		 N/A 1 s - 30 s N/A
Repetition Rate (Max) N/A N/A 3 kHz
Wavelength Correction nm, A/W (Sensor Dependent) nm, V/W (Sensor Dependent) nm, V/J (Sensor Dependent)
Beam Area Setting Diameter 1/e² or Rectangular XY
  • As the PM400 console can only support sensors with repetition rates up to 3 kHz, it should not be used with the ES408C sensor, which detects repetition rates up to 10 kHz.

All technical data are valid at 23 ± 5 °C and 45 ± 15% relative humidity (non-condensing).

Video 3.1  Optical Power Meter Parameter Setup for Improved Accuracy

Video Insight: Optical Power Meter Parameter Setup

To obtain the most accurate power readings a power meter should be configured specifically for the light incident on the power sensor. Video 3.1 demonstrates how to set three important optical power meter parameters: the center wavelength of the light, the maximum optical power the sensor will measure, and the zero offset resulting from the detection of ambient light.

If you would like more information about tips, tricks, and other methods we often use in the lab, we recommend our other Video Insights. In addition, our webinars provide practical and theoretical introductions to our different products.

 

Touchscreen Power Meter Control Panel
Click to Enlarge
Figure 3.2  The Front Panel of the Touchscreen Power Meter

Touchscreen Power Meter Front Panel

Thorlabs' PM400 Power Meter features a front panel with several key elements, as shown in Figure 3.2. The projected capacitive touchscreen and buttons are sensitive enough to allow smooth operation even when the user wears cotton, latex, or nitrile gloves, but durable enough to be cleaned with standard screen cleaning solvents. 

  • Capacitive Touchscreen: The capacitive touchscreen allows the user to control the console functions with finger taps and swipes. Features include numerical displays of power and energy measurements, logging of long-term measurements, settings for a calibration wavelength or a preset attenuation value, and temperature monitoring. The user can switch measurement views by swiping one finger over the screen to the left or right, or by tapping the window icon in the lower right corner of the screen. More details on the measurement options are provided below.
  • Spectral Correction Button: This button opens a screen where the user can quickly select or save up to 12 measurement wavelengths. The PM400 will use this wavelength setting in conjunction with the calibration data recorded in the connector of Thorlabs' power and energy sensors in order to provide a calibrated optical power or energy reading. The selected wavelength is displayed above the button.
  • Delta Mode: In delta mode, the power meter will display the power or energy relative to a user selected setpoint. Pressing this button saves the current power or energy reading as the reference value, and subsequent measurements will be displayed as the difference between the actual value and the reference. The reference value is displayed above this button when Delta Mode is active. 
  • Zeroing: Quickly set the current power or energy value as the zero point for subsequent measurements. The measured power or energy when the console is zeroed will be displayed above the Zero button.
  • Main Menu: This button provides quick access to the main menu. From here, the user can access a submenu to set the parameters for long-term power measurements, device settings, the file manager, sensor info, and the laser calculator. Details are provided below.

Additional Features
 In addition to allowing users to select different measurement modes and settings, the PM400 incorporates other features to allow users to customize the interface.

  • Language Settings: English, French, German, and Chinese can be selected.
  • Display Brightness and Contrast: The power meter screen is backlit and can be dimmed to 1% of the maximum brightness. In addition, the user can choose whether to have the display show white text on a black background, or black text on a white background.
  • Laser Tuning Sound: The power meter plays an audible tone to aid in identifying when peak power is achieved while tuning a laser. The console will beep repeatedly, with the frequency of the beep increasing as the measured power increases.
  • Programmable I/O Ports: The PM400 features four programmable I/O ports for controlling shutters, interlocks, laser warning lights, etc.

The Touchscreen Display

The screenshots below provide an overview of some of the measurement views, measurement settings, functions, and calculators accessible through the touchscreen display.

Power Meter Numeric ReadoutFigure 3.3  Numerical Display

 

Subpanel Display Options
Photodiode Power Sensors Thermal Power Sensors Thermal Position & Power Sensors Pyroelectric Energy Sensors
Current (IDET) Voltage (VDET) Voltage (VDET) Voltage (VDET)
Power (Φe) Power (Φe) Power (Φe) Energy (WDET)
Power in dBm (Φe) Power in dBm (Φe) Power in dBm (Φe) N/A
Max Max Max Max
Min Min Min Min
Ratio (Max/Min) Ratio (Max/Min) Ratio (Max/Min) Ratio (Max/Min)
Sensor Temperaturea Sensor Temperaturea Sensor Temperaturea N/A
Frequency Frequency Frequency Frequency
External NTC Temperature External NTC Temperature External NTC Temperature External NTC Temperature
Irradiance (Ee) Irradiance (Ee) Irradiance (Ee) Fluence (He)
N/A N/A XY Position N/A
  • Many, but not all, of Thorlabs' compatible optical power sensors have an internal temperature sensor. This subpanel display option is only available if this internal temperature sensor is detected by the PM400.

The numerical display shows a digital measurement of the power or energy with a bar graph along the bottom. The orange and blue triangles on the bar graph show the min and max values detected during the measurement. To reset the min and max values, press the reset button on the front panel. The six rectangular subpanels immediately above the power or energy measurement are configurable displays, allowing the user to select which parameters to view. The Subpanel Display Options table provides a summary of available settings for each style of detector.

Power Meter Analog NeedleFigure 3.4  Simulated Analog Needle

Measurements can be viewed with a simulated analog needle. The orange and blue marks are indicators for the max and min measured power, and the scale can be zoomed by a factor of 10. Icons down the side of the screen allow the user to set the bandwidth, adjust the resolution of the digital value at the bottom of the display, change units, adjust the display update rate or change screens.

Power Meter Data LoggingFigure 3.5  Graph View

In the graph view, the user can monitor the optical power or energy of a source as it changes over time. A second, optional display can be added that shows the readout from a connected temperature sensor (the upper graph in Figure 3.5). Icons on the side of the window allow the user to start and stop the measurement, scroll through the data, and open the folder where the measurement is saved.

Power Meter Data StatisticsFigure 3.6  Statistics Display

In the statistics display, the user can start a sequential measurement. The sample rate and duration can be adjusted from the Capture Settings screen, accessible from the main menu. The bottom bar of the display shows the number of measurements taken, total elapsed time since the measurements were started, and the measurement interval. The main part of the display shows statistics for the accumulated measurements, including the minimum, maximum, mean, and standard deviation.

Spectral CorrectionFigure 3.7  Spectral Correction

This mode can be entered by pressing the λ symbol on the front panel. The unit can store up to 12 preset spectral correction entries, editable by the user. In their simplest form, these entries can consist of a single user-entered wavelength that will be used in conjunction with the NIST-traceable calibration data from a Thorlabs' sensor to produce a calibrated power measurement. Alternatively, each entry can be a .csv file with the source spectrum that has been uploaded and saved. When a spectral correction entry is selected, the entry name will be displayed in the field above the spectral correction button.

Attenuation CorrectionFigure 3.8  Attenuation Correction

External devices within a setup, such as a filter or beamsplitter, may be needed to attenuate the signal being measured. The attenuation correction function allows the PM400 to display a power reading that accounts for these sources of attenuation. Attenuation values can be assigned as a multiplier (e.g. x2), in percent, in dB, or in OD (optical density). Alternatively, complete filter transmission curves can be uploaded and saved. Up to 12 different attenuation settings can be programmed and stored.

Main MenuFigure 3.9  Main Menu

The PM400 main menu allows access to device features including the screen brightness, the menus to set the parameters for power, energy, and temperature measurements, a screen for calculating laser pulse characteristics, and a unit converter.

Capture SettingsFigure 3.10  Capture Settings

This screen allows the user to set the parameters for taking data. User-selectable settings include manual or automatic data acquisition, the exposure time, the number of samples, and the capture interval. It also allows the temperature logging parameters to be set. Once all of the settings are selected, this screen will return an estimated file size so that the user can ensure there is enough free memory on the device. In the case of manual operation (the user manually starts and stops the measurement), the estimated output file size will be the rate at which memory is used up as the data is collected.

Measurement SettingsFigure 3.11  Sensor Measurement Settings

This screen allows the user to view sensor-dependent content, adjust common settings such as wavelength, attenuation, mode, etc., and enter beam parameters.

Temperature Measurement SettingsFigure 3.12  Temperature Sensor Settings

If an external temperature sensor is hooked up to the PM400, the user can adjust the parameters here.

Laser CalculatorFigure 3.13  Laser Calculator and Unit Converter

The PM400 has several calculators. The laser calculator screen allows the user to calculate laser beam parameters based on available inputs. A unit converter provides quick conversions between Watts and dBm or between wavelength, frequency, wavenumbers, and photon energy.

Temperature Measurement SettingsFigure 3.14  Position Trace Display (Thermal Position Sensors Only)

When used with the S440C or S442C thermal position sensors, the PM400 console can display a trace of the beam's position within a Ø1 mm circle or Ø6 mm circle on the sensor surface. The total beam power is also monitored in this mode.

Laser CalculatorFigure 3.15  Position Graph Display (Thermal Position Sensors Only)

Similar to the graph display in Figure 3.5, the console can display a graph of the beam's X and Y coordinates over time when used with the S440C or S442C sensors. The user can toggle between this plot and a plot of the the beam's total power over time.

The PM400 Console is capable of supporting any of Thorlabs' C-Series sensor heads (except the ES408C Pyroelectric Energy Sensor) as well as some third-party and custom detectors. The main connections are shown in Figure 4.1, and the pin diagrams are provided to aid in determining sensor compatibility. Compatible sensor specifications are provided on the Specs tab.

Power Meter Connectors
Figure 4.1  Top View of the PM400 Console

Optical Sensor Head Input


9-Pin Female D-Sub
Pin Connection
1 +5 V (100 mA Max Current from this Pin)
2 DO NOT USEa
3 AGND (Analog Ground): Photodiode Ground (Anode),
Thermal and Pyroelectric Sensor Ground
4 Photodiode Cathode
5 Pyroelectric Sensor +
6 DGND (Digital Ground)
7 Present: Connect this Pin via a 1 kΩ to 10 kΩ Resistor
to Pin 3 (AGND) to Enable a Custom Sensor
8 Thermal Sensor +
9 Not Connected
  • Pin 2 is reserved for the EEPROM Digital I/O (memory in Thorlabs' sensor heads) and MUST NOT be used. Connecting this pin may cause the PM400 to malfunction.

Auxiliary Connector


14-Pin Dual-In-Line Socket, 0.1" (2.54 mm) Pitch
Pin Connection
1 Ground
2 +3.3 VDC, 0.1 A
3 Do Not Use (No Function)
4 ADC Current In (Humidity Sensor)
5 Temp / Humidity Detection Module
6 ADC Current In (Temperature Sensor)
7 GPIO 02
8 GPIO 01
9 GPIO 03
10 GPIO 04
11 Ground
12 + 2.5 VDC, 0.05 A
13 Ground
14 -2.5 VDC, 0.05 A

Mini-B USB 2.0 Port


For Remote Control with a Mini-USB Device and Charging

Analog Output


0 to 2 V,
3.5 mm Mono Audio (2P) Jack

Temperature Sensor Input


2.5 mm Stereo Audio (2P) Jack
for NTC
power meter package
Click to Enlarge
Figure 5.1  The PM400 is shipped in an eco-friendly package.

Included Components

  • Power Meter Console with Multi-Touch Technology
  • BNC to 3.5 mm Mono Audio Adapter for Analog Output
  • USB Cable, Type A to Mini B
  • Operating Manual
  • Certificate of Calibration

Compatible Power Meters

  • Consoles:
    • PM100A Analog Power and Energy Meter Console
    • PM100D Digital Power and Energy Meter Console
    • PM400 Capacitive Touchscreen Power and Energy Meter Console
    • PM5020 Dual-Channel Benchtop Optical Power and Energy Meter Console (Version 4.0 or Later)
  • Complete Power Meters:
    • PM160, PM160T, and PM160T-HP Wireless Handheld Power Meters with Bluetooth® Technology
    • PM16 Series Compact USB Power Meters
    • PM60 and PM61 Fiber Optic Power Meter Series (Version 6.0 or Later)
  •  Interfaces:
    • PM101 Series Power Meter Interfaces with External Readout (Version 2.0 or Later)
    • PM102 Series Power Meter Interfaces with External Readout (Version 2.1 or Later)
    • PM103 Series Power Meter Interfaces with External Readout (Version 3.0 or Later)
    • PM100USB USB Interface Digital Power and Energy Meter

Compatible Extinction Ratio Meters

    • ERM2xx Series Extinction Ratio Meters

    Optical Power Monitor

    The Optical Power Monitor GUI software features power measurement, readout from up to eight power meters, and remote wireless operation.

    For details on specific software features, please see the user manual.

    Users interested in the legacy Power Meter Software can find it by visiting the software page.

    The PM101 Series Power Meters are only compatible with version 2.0 or later. The PM102 Series Power Meters are only compatible with version 2.1 or later. The PM103 Series Power and Energy Meters are only compatible with version 3.0 or later. The PM5020 Console is only compatible with version 4.0 or later. The PM60 and PM61 Power Meter Series are only compatible with version 6.0 or later. 

    Software Download

    Optical Power Monitor GUI Software for Touchscreen, Handheld, and USB-Interface Power Meters

    Features

    • Operate up to Eight Power Meters Simultaneously
    • Record and Analyze Measurements in Real Time
    • Intuitive Analog Display and Graphing Modes
    • Configurable Long-Term Data Logging
    • Also Supports Position Measurements with Thermal Position & Power Sensors
    • Compatible with USB and Bluetooth® Connections

    The Optical Power Monitor software GUI enables seamless control of up to eight power meters that are connected via USB, RS232, or Bluetooth® wireless technologya. The latest software, firmware, drivers, and utilities for these power meters can be downloaded here.

    Multiple data measurement and analysis functions are integrated into the GUI package. The interface offers a user-friendly design with minimal use of color and low brightness that is ideal use in dark lab environments while wearing laser safety glasses. Measured data can be displayed in real time as a simulated analog needle, digital values, line graph, or bar graph. Continuously logged and short-term measurements can be recorded for data viewing and analysis at a later point. A built-in statistics mode analyzes measured data and continuously updates to reflect new measurements within the pre-determined measurement period. Beam position measurements are also supported when used with our thermal position & power sensors.

    The Optical Power Monitor software package installs the GUI, which then can be used to control the touchscreen, handheld, or USB-interface power meters. Firmware updates for supported power meters are also available. Programming examples and drivers for interfacing with our power and energy meter consoles using LabVIEW, C/C++, Visual C#, and Python are installed with the software; refer to the manual for details.

    Please note that the Optical Power Monitor Software uses different drivers than the Power Meter Utilities Software and Thorlabs recommends using the new driver TLPM.dll. For users who wish to use the legacy Power Meter Software or use custom software designed using the older PM100D.dll driver, a Power Meter Driver Switcher program is included for easy swapping of the installed driver between the two versions.

    a. The PM61 Series, PM160, PM160T, and PM160T-HP power meters are equipped with Bluetooth® connections.

    Optical Power Meter Utility
    Click to Enlarge
    Figure 149A  Power Measurement Mode
    Set up and configure up to eight power meters.
    Optical Power Meter Utility
    Click to Enlarge
    Figure 149B  Power Tuning Mode
    Simulated analog needle and digital measurement value provided. Delta Mode, enabled here, shows the fluctuation range during the measurement period.
    Optical Power Meter Utility
    Click to Enlarge
    Figure 149C  Power Statistics Mode
    Calculate numerical statistics for a pre-determined measurement period. The panel displays the analyzed values in a bar graph and the results as numerical values.
    Optical Power Meter Utility
    Click to Enlarge
    Figure 149D  Position Tuning Mode
    Tuning mode can be used with a thermal position & power sensor to aid in beam alignment.
    Optical Power Meter Utility
    Click to Enlarge
    Figure 149E  Position Statistics Mode
    Statistics mode also provides aggregate information for thermal position & power sensors.
    Optical Power Meter Utility
    Click to Enlarge
    Figure 149F  Data Logging
    Enable long-term measurement and simultaneous recording from up to eight power meters. Save data as .csv files for later processing while measurement results are displayed in a graph in real time.
    Handheld Power Meter with iPad
    Click to Enlarge
    Figure 113A  The PM160 wireless power meter, shown here with an iPad mini (not included), can be remotely operated using Apple mobile devices.

    This tab outlines the full selection of Thorlabs' power and energy sensors. Refer to Table 113B for power meter console and interface compatibility information.

    In addition to the power and energy sensors listed below, Thorlabs also offers all-in-one, wireless, handheld power meters and compact USB power meter interfaces that contain either a photodiode or a thermal sensor, as well as power meter bundles that include a console, sensor head, and post mounting accessories.

    Thorlabs offers four types of sensors:

    • Photodiode Sensors: These sensors are designed for power measurements of monochromatic or near-monochromatic sources, as they have a wavelength dependent responsivity. These sensors deliver a current that depends on the input optical power and the wavelength. The current is fed into a transimpedance amplifier, which outputs a voltage proportional to the input current.
    • Thermal Sensors: Constructed from material with a relatively flat response function across a wide range of wavelengths, these thermopile sensors are suitable for power measurements of broadband sources such as LEDs and SLDs. Thermal sensors deliver a voltage proportional to the input optical power.
    • Thermal Position & Power Sensors: These sensors incorporate four thermopiles arranged as quadrants of a square. By comparing the voltage output from each quadrant, the unit calculates the beam's position.
    • Pyroelectric Energy Sensors: Our pyroelectric sensors produce an output voltage through the pyroelectric effect and are suitable for measuring pulsed sources, with a repetition rate limited by the time constant of the detector. These sensors will output a peak voltage proportional to the incident pulse energy.
    Table 113B  Console Compatibility
    Console Item # PM100A PM100D PM400 PM5020 PM101
    Series    		 PM102
    Series    		 PM103
    Series    		 PM100USB
    Photodiode Power -
    Thermal Power -
    Thermal Position - - - - -
    Pyroelectric Energy - a a - - a
    • As the PM100D and PM400 consoles and the PM100USB interface can only support repetition rates of up to 3 kHz, they should not be used with the ES408C sensor, which detects repetition rates up to 10 kHz.

    Power and Energy Sensor Selection Guide

    There are two options for comparing the specifications of our Power and Energy Sensors. Tables 113C, 113D, 113E, and 113F sort our sensors by type (e.g., photodiode, thermal, or pyroelectric) and provide key specifications.

    Alternatively, the selection guide Figures 113G and 113H arrange our entire selection of photodiode and thermal power sensors by wavelength (Figure 113G) or optical power range (Figure 113H). Each box contains the item # and specified range of the sensor. These graphs allow for easy identification of the sensor heads available for a specific wavelength or power range.

    Table 113C  Photodiode Power Sensors
    Table 113D  Thermal Power Sensors
    Table 113E  Thermal Position & Power Sensors
    Table 113F  Pyroelectric Energy Sensors
    • The response time of the photodiode sensor. The actual response time of a power meter using these sensors will be limited by the update rate of your power meter console.
    • The power range provided is for lasers with a repetition rate of 80 MHz. Because the peak power and peak power density are dependent on the average power and repetition rate of the laser, the upper limit to the working average power range will be lower for lower repetition rates. Please see the Specs tab here for more details. 
    • Typical natural response time (0 - 95%). Our power consoles can provide estimated measurements of optical power on an accelerated time scale (typically <1 s) when the natual response time is approximately 1 s or greater. As the natural response times of the S415C, S425C, and S425C-L are fast, these do not benefit from accelerated measurements and this function cannot be enabled. For more information, see the Operation tab here.
    • With intermittent use: maximum exposure time of 20 minutes for the S401C, otherwise maximum exposure time is 2 minutes.
    • All pyroelectric sensors have a thermal time constant, τ. This value indicates how long it takes the sensor to recover from a single pulse. To detect the correct energy levels, pulses must be shorter than 0.1τ and the repetition rate of your source must be well below 1/τ. Please see the Specs tab here for the τ value of each sensor.

    Sensor Key

    Sensors by WavelengthFigure 113G  Sensor Options Arranged by Wavelength Range
    Sensors by PowerFigure 113H  Sensor Options Arranged by Power Range

    Thorlabs offers a wide selection of power and energy meter consoles and interfaces for operating our power and energy sensors. Key specifications of all of our power meter consoles and interfaces are presented in this tab to help you decide which device is best for your application. We also offer self-contained wireless power meters and compact USB power meters.

    When used with our C-series sensors, Thorlabs' power meter consoles and interfaces recognize the type of connected sensor and measure the current or voltage as appropriate. Our C-series sensors have responsivity calibration data stored in their connectors. The console will read out the responsivity value for the user-entered wavelength and calculate a power or energy reading.

    • Photodiode sensors deliver a current that depends on the input optical power and the wavelength. The current is fed into a transimpedance amplifier, which outputs a voltage proportional to the input current. The photodiode's responsivity is wavelength dependent, so the correct wavelength must be entered into the console for an accurate power reading. The console reads out the responsivity for this wavelength from the connected sensor and calculates the optical power from the measured photocurrent.
    • Thermal sensors deliver a voltage proportional to the input optical power. Based on the measured sensor output voltage and the sensor's responsivity, the console will calculate the incident optical power.
    • Energy sensors are based on the pyroelectric effect. They deliver a voltage peak proportional to the pulse energy. If an energy sensor is recognized, the console will use a peak voltage detector and the pulse energy will be calculated from the sensor's responsivity.

    The consoles and interfaces are also capable of providing a readout of the current or voltage delivered by the sensor. Select models also feature an analog output.

    Consoles

    Item # PM100A PM100D PM400 PM5020
    (Click Photo to Enlarge) PM100A PM100D PM400 PM5020
    Key Features Analog Power Measurements Digital Power and Energy Measurements Digital Power and Energy Measurements, Touchscreen Control Dual Channel
    Compatible Sensors Photodiode and Thermal Power Photodiode Power, Thermal Power, and Pyroelectric Energya Photodiode Power, Thermal Power, Thermal Power and Position, and Pyroelectric Energya Photodiode Power, Thermal Power, Thermal Power and Position, and Pyroelectric Energy
    Housing Dimensions
    (H x W x D)    		 7.24" x 4.29" x 1.61"
    (184 mm x 109 mm x 41 mm)    		 7.09" x 4.13" x 1.50"
    (180 mm x 105 mm x 38 mm)    		 5.35" x 3.78" x 1.16"
    (136.0 mm x 96.0 mm x 29.5 mm)    		 9.97" x 4.35" x 11.56"
    (253.2 mm x 110.6 mm x 293.6 mm)
    Channels 1 2
    External Temperature Sensor Input (Sensor not Included) - - Readout and Record Temperature Over Time Readout and Record Temperature Over Time
    External Humidity Sensor Input (Sensor not Included) - - Readout and Record Humidity Over Time Readout and Record Humidity Over Time
    Input/Output Ports - 4 GPIO, Programmable 4 Configurable Digital I/O Channels
    Shutter Control - - - Support for SH05R(/M) or SH1(/M) Optical Shutter with Interlock Input
    Fan Control - - - Yes!
    Source Spectral Correction - - Yes! Yes!
    Attenuation Correction - - Yes! Yes!
    External Trigger Input - - - Yes!
    Display
    Type Mechanical Needle and LCD Display with Digital Readout 320 x 240 Pixel Backlit Graphical LCD Display Protected Capacitive Touchscreen with Color Display
    Dimensions Digital: 1.9" x 0.5"
    (48.2 mm x 13.2 mm)
    Analog: 3.54" x 1.65"
    (90.0 mm x 42.0 mm)    		 3.17" x 2.36"
    (81.4 mm x 61.0 mm)    		 3.7" x 2.1"
    (95 mm x 54 mm)    		 4.32" x 2.43"
    (109.7 mm x 61.6 mm)
    Refresh Rate 20 Hz 10 Hz (Numerical)
    25 Hz (Analog Simulation)    		 25 Hz
    Measurement Viewsb
    Numerical yes yes yes
    Mechanical Analog Needle yes - - -
    Simulated Analog Needle - yes Yes! yes
    Bar Graph - yes Yes! yes
    Trend Graph - yes Yes! yes
    Histogram - yes - -
    Statistics Yes! yes Yes! yes
    Memory
    Type - SD Card NAND Flash SD Card
    Size - 2 GB 4 GB 8 GB
    Power
    Battery LiPo 3.7 V 1300 mAh LiPo 3.7 V 2600 mAh -
    External 5 VDC via USB or Included AC Adapter 5 VDC via USB Line Voltage: 100 - 240 V
    • As the PM100D and PM400 consoles can only support repetition rates of up to 3 kHz, they should not be used with the ES408C sensor, which detects repetition rates up to 10 kHz.
    • These are the measurement views built into the unit.

    Interfaces

    Item # PM101 PM102 PM103 PM101A PM102A PM103A
    (Click Photo to Enlarge) PM101 PM102 PM103 PM101A PM102A PM103A
    Operation Protocol USB, RS232, UART,
    and Analog    		 USB and Analog SMA
    Sensor Compatibility
    Photodiode - -
    Thermal Power - -
    Thermal Position & Power - - - -
    Pyroelectric - - - -

    Item # PM103E PM101R PM101U PM102U PM103U PM100USB
    (Click Photo to Enlarge) PM101R PM101U PM102U PM103U PM100USB
    Operation Protocol Ethernet, RS232, and Analog USB and
    RS232    		 USB Operation USB
    Sensor Compatibility
    Photodiode -
    Thermal Power -
    Thermal Position & Power - - - -
    Pyroelectric - - - a
    • As the PM100USB interface can only support repetition rates of up to 3 kHz, it should not be used with the ES408C sensor, which detects repetition rates up to 10 kHz.
    • Dependent on PC Settings
    • These power meter interfaces do not have a built-in monitor, so all data must be displayed through a PC running the Optical Power Monitor Software.
    •  48 V is the nominal voltage over the network, but can range from 36 V - 57 V.
    ISO 17025
    Figure 796A  DAkkS-accredited calibrations are performed in accordance with DIN EN ISO/IEC 17025:2018.

    Recalibration Services
    Thorlabs offers two types of recalibration services in-house for our power and energy meter electronics and photodiode power sensors: ISO17025 accredited calibrations and manufacturer calibrations. Only the manufacturer calibration is available for the NS170C microscope slide peak power sensor, our thermal power sensors, and our pyroelectric energy sensors. All new products are delivered with a manufacturer calibration by default; if an ISO17025 accredited calibration is desired for a new device, please contact Tech Sales.

    ISO17025 accredited calibrations are performed in-house in accordance with DIN EN ISO/IEC 17025:2018. Thorlabs GmbH's calibration laboratory is accredited by the German Accreditation Body (DAkkS), the national accreditation authority of the Federal Republic of Germany. The scope of services is described here in English or German. Accredited calibrated power and/or energy meter electronics come with a dedicated certificate of calibration proving the specified accuracy and traceability of calibration data. This certification may be required in certain applications or industries, such as the medical market.

    In contrast, our manufacturer calibrations are subject to the quality management requirements of ISO9001. The certificate of calibration lists the equipment used for the calibration procedure as well as the calibration data acquired. The manufacturer calibration of a power sensor includes recalibration of a single-channel console or interface at no additional cost. If you wish to calibrate one or more sensors with a dual-channel console, each sensor and console calibration service will need to be purchased individually.

    Both types of calibration can be offered for third-party equipment or adjusted for special requirements upon request. Please reach out to Tech Sales for further details.

    We recommend recalibrating your Thorlabs sensor and console as a pair; however, each may be recalibrated individually. To ensure accurate measurements, we recommend recalibrating annually. To order one or more sensor recalibrations with a dual-channel console, we offer two options: either 1) fill out the Returns Material Authorization (RMA) form with each console and sensor Item # to be recalibrated and specify either manufacturer calibration or ISO17025 accredited calibration in the "Further Details" field, or 2) separately add each recalibration service Item # offered below to your cart.


    Posted Comments:
    Mauricio B.  (posted 2025-01-17 14:51:08.69)
    Hi Thorlabs team, First of all, you rock! I love all your products. Second, I recently had some issues with my PM400. It was automatically disconnecting from the PC after being recognized on the Optical Power Monitor software for about 1-2 seconds. I thought it was a firmware issue, so I downloaded the latest firmware and proceeded to install it on the device. It again disconnected automatically in the middle of the installation process and now the power meter is stuck in the bootlader with "DFU error 10". Turning it on and off doesn't change the screen. Could you help me solve this issue? Thanks in advance! you rockers!
    hkarpenko  (posted 2025-01-20 07:49:53.0)
    Dear customer, thank you very much for your kind feedback. To resolve your issue I will contact you directly.
    Tom Shahaf  (posted 2024-09-15 22:41:28.29)
    hello, can you provide an example of a python code that use the device?
    jjadvani  (posted 2024-09-16 04:05:35.0)
    Dear Tom, Thank you for your feedback. Please find example code for python on the following link. https://github.com/Thorlabs/Light_Analysis_Examples/tree/main/Python/Thorlabs%20PMxxx%20Power%20Meters , Additional python code are included in the installation package of OPM software (https://www.thorlabs.com/software_pages/ViewSoftwarePage.cfm?Code=OPM ). You can find those example after installing software on this folder C:\Program Files (x86)\IVI Foundation\VISA\WinNT\TLPMX\Examples\Python
    李 李  (posted 2024-09-11 22:14:40.793)
    功率计表头PM400语言无法切换，只能使用英文，请协助解决
    jjadvani  (posted 2024-09-11 10:10:41.0)
    Dear Kangleek, Thank you for your feedback. Someone from local tech support team will contact you directly to troubleshoot your issue.
    Jideofor Odoeze  (posted 2024-08-17 04:07:57.11)
    Just asking if I cannot use this for LIV curve. I mean I know the Is current sweep. Having the console log the data, I can always figure out the x-axis. Is this console fast enough to respond to a fast sweep? 100kHz is fast enough I think. Summarily, I want to know if I can use this for LIV curve measurement.
    hkarpenko  (posted 2024-08-19 11:23:24.0)
    Dear customer, thank you very much for your feedback. The bandwidth of the PM400 is limited to the USB bandwidth and CPU of your computer. You could achieve rates only up to 300Hz. The 100kHz full bandwidth can only be achieved when using the analog ouput of the console. In addition the bandwidth can even further decrease depending on the used sensor. I will contact you directly to find a solution with you.
    Boris Považay  (posted 2023-07-04 12:08:27.337)
    Any plans to offer this device with an USB-C-connector (especially for charging - mini-USB is already extinct)? Best regards
    hkarpenko  (posted 2023-07-05 10:47:31.0)
    Dear Boris, thank you very much for your feedback. At the moment there is no plan for updating this device to USB-C, but we are logging your request and will definetly have this in mind for our next generation of power meters. But since we deliver this device with a mini-USB cable it should not be much of a problem of using the device.
    Ronald Sipkema  (posted 2023-05-02 13:32:20.657)
    I regularly use an S440C sensor in combination with the PM400 for laser beam alignment. I have the sensor mounted on a custom freely rotating "quick release" mount so I can position it at different locations in the beam path. The center of the four quadrants does not perfectly match the center of this mount though: I can find the center of the four quadrants by looking at the circular path the beam position makes when rotating the mount. It would be really nice if it were possible to "zero" the position the PM400 returns (either by zeroing it to the current position or by manual entry of the X and Y offsets). With that option added this would really be an ideal beam alignment tool.
    wskopalik  (posted 2023-05-03 02:50:10.0)
    Thank you very much for your feedback! I will forward your suggestion to our engineering team so we can check if this feature can be added to the PM400 or to the GUI.
    user  (posted 2022-09-14 10:22:26.863)
    I can find two VI folders (TLPM and TLPMX) in the LabVIEW folder after installing the software for the power meter. Can you tell me the difference of these VIs?
    GBoedecker  (posted 2022-09-14 07:23:52.0)
    Thank you for your inquiry. TPLMX is the driver for the dual-channel power meter PM5020. For the other power meters, you can use TPLM.
    Y BoH  (posted 2021-03-09 02:59:53.623)
    It is such a shame that Thorlabs releases a product with such low quality language support. The Chinese translation is just garbage(Even google translation does a much better job than that!). If you have a colleague knowing Chinese, switch your PM400 with firmware 1.2.8 to Chinese(in display menu), and loop through other menus and pages, your colleague will sure laugh out loud. I am willing to fix this for Thorlabs if Thorlabs give me a new PM400 for free.
    tcampbell  (posted 2021-03-10 08:26:27.0)
    Hello, and thank you for your honest feedback on our device's programming. We have begun working to improve the power meter console's Chinese translations. These improvements will be included in a firmware update in the near future.
    Michael L  (posted 2021-01-25 08:27:35.173)
    Hi, how long does the startup take? I bought the previous model and that took extremely long to start up, compared to the older B/W screen models.
    soswald  (posted 2021-01-25 09:34:00.0)
    Dear Michael, thank you for your feedback. The startup duration of the PM400 is typically a few seconds.
    zhaozhao mao  (posted 2020-12-08 01:01:28.267)
    需要功率计表头和探头，1250~1550nm，mW级
    wskopalik  (posted 2020-12-08 10:16:41.0)
    Thank you for your inquiry! We will contact you directly to provide further assistance.
    Juyoung Kim  (posted 2020-04-21 21:28:05.647)
    Dear PM400 support team, I would like to confirm with the team with one question: Can C(++) talk to PM400 and get the power meter output and the instrument clock at the same time? I am pretty sure about this feature, but could you point me relevant C(++) functions? If possible, could you send me any example code for this basic operation? I would appreciate it much. Thank you. Best regards, Juyoung
    wskopalik  (posted 2020-04-22 11:49:39.0)
    This is a response from Wolfgang at Thorlabs. Thank you very much for your inquiry! You would need to use two commands in this case. At first, you need to use one of the measurement commands, e.g. "TLPM_measPower" or "TLPM_measEnergy" depending on the sensor you use. After that, you can read the time by using "TLPM_getTime". This command is available on PM100D, PM200, and PM400 power meters and returns the time as it is set on the power meter. Alternatively, you can also read the time which is set on your computer by using a C/C++ library. I will contact you directly to provide further assistance.
    Matt Dabrowski  (posted 2020-03-04 16:55:00.953)
    I am using a PM400. Recently, I went to update the firmware, and I connected the PM400 to the computer. When I used the latest OPM software to update the firmware I always got the following warning: "user abort the download operation" but I haven't done anything. Hoping for your answer. Thanks. Regards, Matt Dabrowski
    dpossin  (posted 2020-03-06 10:05:31.0)
    Dear Matt, Thank you for your feedback. We are currently working on an firmware revision to eliminate this issue. We already contacted you regarding an solution. We will upload an firmware update on the website as soon as possible.
    user  (posted 2018-05-24 12:34:50.27)
    On your old PM100 Powermeters the display backlight could be turned off. Can the display on the PM400 also be turned off, while continuing to capture data via LabView/USB?
    mvonsivers  (posted 2018-06-07 03:56:07.0)
    This is a response from Moritz at Thorlabs. Thank you for your inquiry. The display cannot be completely turned off but the brightness can be dimmed to 1%.
    zahariev  (posted 2018-03-23 09:42:41.347)
    The power meter do the great job. However I have a comment. Even been specified in the shipping list, the idea to sell it without power adapter (charger) could cos some inconvenience.
    swick  (posted 2018-04-16 04:40:04.0)
    This is a response from Sebastian at Thorlabs. Thank you for the feedback. We are glad to hear you are happy with our PM400. The PM400 includes a USB cable which can be used to charge the device via USB ports. I understand that it would be helpful to have an USB charger included to the PM400. We will internally discuss your comment.
    arkke.eskola  (posted 2016-10-27 13:14:48.693)
    Hi, I am thinking to buy PM400. Important option for my application would be to control it using LabVIEW, in my case LabVIEW2015. Do you have LabVIEW2015 drivers for PM400? Thanks, Arkke Eskola
    wskopalik  (posted 2016-10-28 03:59:43.0)
    This is a response from Wolfgang at Thorlabs. Thank you for your inquiry. We provide LabView drivers as well as drivers for C/C++ and DotNet for the PM400. They are included in the installation package you can find here on the website. I will contact you directly to provide further details.

    Touchscreen Power and Energy Meter Console with Multi-Touch Technology

    Touchscreen Power Meter
    Click to Enlarge
    View Imperial Product List
    Item #QtyDescription
    PM4001Projected Capacitive Touchscreen Optical Power and Energy Meter Console
    S120C1Standard Photodiode Power Sensor, Si, 400 - 1100 nm, 50 nW - 50 mW
    TSP-TH1Additional External Temperature Probe, -15 °C to 200 °C
    VH11Miniature V-Clamp, 0.42" Long, 8-32 Tapped Hole
    UPH22Ø1/2" Universal Post Holder, Spring Loaded Locking Thumbscrew, L = 2"
    TR22Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 2"
    SH8S062528-32 Stainless Steel Cap Screws, 5/8" Long, 50 Pack
    View Metric Product List
    Item #QtyDescription
    PM4001Projected Capacitive Touchscreen Optical Power and Energy Meter Console
    S120C1Standard Photodiode Power Sensor, Si, 400 - 1100 nm, 50 nW - 50 mW
    TSP-TH1Additional External Temperature Probe, -15 °C to 200 °C
    VH1/M1Miniature V-Clamp, 0.42" Long, M4 Tapped Hole
    UPH50/M2Ø12.7 mm Universal Post Holder, Spring-Loaded Locking Thumbscrew, L = 50 mm
    TR50/M2Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm
    SH4MS162M4 x 0.7 Stainless Steel Cap Screw, 16 mm Long, 50 Pack
    Figure G1.1  PM400 with S120C Photodiode Sensor (Available Below) and TSP-TH Temperature Sensor
    • Compact Power Meter Console
    • Projected Capacitive Touchscreen with Multi-Touch Technology
    • Compatible with Over 30 Power and Energy Sensors (Available Below)
    • Inputs for Third-Party and Custom Sensors
    • 4 GB Internal Memory
    • USB 2.0 Interface for Control via PC

    Thorlabs' PM400 power meter console is compatible with over 30 power, position, and energy sensors, available below. When used with these sensors, the console will automatically detect and read the sensor calibration information stored in the sensor connector and combine this data with a user-set measurement wavelength to provide calibrated power or energy measurements. The console can also be used with third-party or custom sensors that meet the compatibility requirements outlined on the Specs tab.

    Thorlabs offers recalibration services for the PM400 power and energy meter's electronics (see Item #s CAL-PM1 or CAL-PM1D below). Alternatively, if ordering a NIST traceable recalibration for a compatible sensor, the PM400 console recalibration can be included with the sensor recalibration at no additional cost (not available for the ISO17025 accredited calibration option). See the bottom of the page for ordering information.

    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    PM400 Support Documentation
    PM400Projected Capacitive Touchscreen Optical Power and Energy Meter Console
    		$1,694.18
    Lead Time

    Standard Photodiode Power Sensors

    S120C and quick release 30mm Cage System
    Click to Enlarge
    Figure 614A  S120C and CP44F Quick-Release Mount
    • For General Purpose Optical Power Measurements
    • Integrated Viewing Target for Easy Sensor Alignment
    • Ø9.5 mm Sensor Aperture
    • Sensor, Protective Cap, IR Target, and Thread Adapter Included
    • Fiber Adapters Available Separately (See Table 614B)
    • See the Full Web Presentation for More Information

    These Standard Photodiode Power Sensors are ideal for metering low power coherent and incoherent sources from the UV to the NIR. Each NIST-Traceable, calibrated sensor features an integrated viewing target for easy alignment, enhanced shielding against electromagnetic interference, an over-temperature-alert device, and a large Ø9.5 mm sensor aperture. The sensors are compatible with 30 mm cage systems, Ø1/2" posts, and SM1 (1.035"-40) lens tubes, and are ideal for free-space and fiber-coupled sources.

    Thorlabs offers recalibration services for these photodiode power sensors, which can be ordered below (see Item #s CAL-UVPD or CAL-UVPDD for UV-extended Si sensors, Item #s CAL-PD or CAL-PDD for Si sensors and Item #s CAL-IRPD or CAL-IRPDD for Ge sensors).

    Table 614B  Specifications
    Item #a S120VC S120C S121C S122Ch
    Sensor Image
    (Click the Image to Enlarge)

    S120VC

    S120C

    S121C

    S122C
    Aperture Size Ø9.5 mm
    Wavelength Range 200 - 1100 nm 400 - 1100 nm 400 - 1100 nm 700 - 1800 nm
    Power Range 50 nW - 50 mW (200 - 450 nm)
    50 nW - 20 mW (450 -1100 nm)    		 50 nW - 50 mW 500 nW - 500 mW 50 nW - 40 mW
    Detector Type Si Photodiode (UV Extended) Si Photodiode Ge Photodiode
    Linearity ±0.5%
    Resolutionb 1 nW 10 nW 2 nW
    Measurement Uncertaintyc ±3% (440 - 980 nm)
    ±5% (280 - 439 nm)
    ±7% (200 - 279 nm,
    981 - 1100 nm)    		 ±3% (440 - 980 nm)
    ±5% (400 - 439 nm)
    ±7% (981 - 1100 nm)    		 ±5%
    Responsivityd (Click for Plot)
    Raw Data
    Raw Data
    Raw Data
    Raw Data
    Coating/Diffuser Reflective ND (OD1.5)e Reflective ND (OD1)f Reflective ND (OD2)g Absorptive ND (Schott NG9)
    Head Temperature Measurement NTC Thermistor 4.7 kΩ
    Housing Dimensions Ø30.5 mm x 12.7 mm
    Cable Length 1.5 m
    Post Mountinge,f,g Universal 8-32 / M4 Tap, Post Not Included
    Aperture Thread External SM1 (1.035"-40)
    Compatible Fiber Adapters S120-FC2, S120-FC, S120-APC2, S120-APC, S120-SMA, S120-ST, S120-LC, and S120-SC (Not Included)
    Compatible Consoles PM400, PM100D, PM100A, and PM5020
    Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM103, PM103A, PM103E, PM103U, and PM100USB
    • For complete specifications, please see the Specs tab here.
    • Measured with PM100D console in low bandwidth setting.
    • Beam diameter > 1 mm.
    • All sensor responsivities are calibrated to a NIST-traceable source with measurements taken in 5 nm intervals.
    • For the S120VC, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had a reflective ND diffuser (OD1). Additionally, they came with an 8-32 tap and M4 adapter. For additional information, please contact technical support.
    • For the S120C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had an absorptive ND diffuser (Schott NG3). Additionally, they came with an 8-32 tap and M4 adapter. For additional information, please contact technical support.
    • For the S121C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had a absorptive ND diffuser (Schott NG9). Additionally, they came with an 8-32 tap and M4 adapter. For additional information, please contact technical support.
    • Previously, S122C came with an 8-32 tap and M4 adapter. For additional information, please contact technical support.
    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    S120VC Support Documentation
    S120VCStandard Photodiode Power Sensor, UV-Extended Si, 200 - 1100 nm, 50 nW - 50 mW
    		$528.76
    Lead Time
    S120C Support Documentation
    S120CStandard Photodiode Power Sensor, Si, 400 - 1100 nm, 50 nW - 50 mW
    		$381.34
    Lead Time
    S121C Support Documentation
    S121CStandard Photodiode Power Sensor, Si, 400 - 1100 nm, 500 nW - 500 mW
    		$414.38
    Today
    S122C Support Documentation
    S122CStandard Photodiode Power Sensor, Ge, 700 - 1800 nm, 50 nW - 40 mW
    		$761.37
    Lead Time

    Slim Photodiode Power Sensors


    Click to Enlarge
    View Imperial Product List
    Item #QtyDescription
    Imperial Product List
    S130C1Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 500 pW - 5 mW, Up to 500 mW with Filter
    CP332SM1-Threaded 30 mm Cage Plate, 0.35" Thick, 2 Retaining Rings, 8-32 Tap
    TR61Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 6"
    ER6-P43Cage Assembly Rod, 6" Long, Ø6 mm, 4 Pack
    CM1-BS013130 mm Cage Cube-Mounted Non-Polarizing Beamsplitter, 400 - 700 nm, 8-32 and M4 Adapters
    View Metric Product List
    Item #QtyDescription
    Metric Product List
    S130C1Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 500 pW - 5 mW, Up to 500 mW with Filter
    CP33/M2SM1-Threaded 30 mm Cage Plate, 0.35" Thick, 2 Retaining Rings, M4 Tap
    TR150/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 150 mm
    ER6-P43Cage Assembly Rod, 6" Long, Ø6 mm, 4 Pack
    CM1-BS013130 mm Cage Cube-Mounted Non-Polarizing Beamsplitter, 400 - 700 nm, 8-32 and M4 Adapters
    Figure 615C  S130C Sensor in a 30 mm Cage

    Click for Details
    Figure 615B  SM1A29 SM1 Thread Adapter Mounted on a S130C Sensor

    Click for Details
    View Product List
    Item #QtyDescription
    Universal Product List
    S130C1Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 500 pW - 5 mW, Up to 500 mW with Filter
    FB-511Single-Axis FiberBench, L = 51 mm, 5 Positions
    FBSM1FiberBench Mount for Slim Photodiode Sensors
    HCA3-SM11FiberBench Wall Plate, FiberPort Compatible, Internally SM1-Threaded
    PAF-X-5-B1FiberPort, FC/PC & FC/APC, f=4.6 mm, 600 - 1050 nm, Ø1.00 mm Waist
    FBR-LPVIS1Rotating Linear Polarizer Module, 500 - 720 nm, Ø2.5 mm CA
    Figure 615A  S130C Photodiode Sensor Mounted in FiberBench System Using FBSM Mount
    • For Optical Power Measurements in Confined Spaces
    • Very Slim Design: 5 mm Thin on Sensor Side
    • Ø9.5 mm Sensor Aperture
    • Slideable ND Filter Automatically Changes Sensor Power Range
    • Optional SM1A29 Adapter with VIS/IR Target and External SM1 Threading (More Details)
    • Optional FBSM Mount with VIS/IR Target for FiberBench Systems (More Details)
    • See the Full Web Presentation for More Information

    These Slim Photodiode Power Sensors are designed to take optical source power measurements in locations where space and accessibility are at a premium. The 5 mm thin sensor end can fit between closely spaced optics, cage systems, and other arrangements where standard power meters may not fit. The NIST-Traceable, calibrated sensors also feature a large Ø9.5 mm sensor aperture and slideable neutral density filter for dual power ranges in one compact device.

    A separately available SM1A29 adapter can be attached by 2 setscrews to any S130 series power sensor to mount fiber adapters, light shields, filters or any other SM1-threaded (1.035"-40) mechanics or optics. The FBSM Mount allows our S130 series power sensors to be mounted vertically into FiberBench systems for stable mounting with a minimal footprint.

    Thorlabs offers recalibration services for these photodiode power sensors, which can be ordered below (see Item #s CAL-UVPD2 or CAL-UVPD2D for UV-extended Si sensors, Item #s CAL-PD2 or CAL-PD2D for Si sensors, and Item #s CAL-IRPD2 or CAL-IRPD2D for Ge sensors).

    Table 615D  Specifications
    Item #a S130VC S130C S132C
    Sensor Image
    (Click the Image to Enlarge)

    S130VC

    S130C

    S132C
    Aperture Size Ø9.5 mm
    Wavelength Range 200 - 450 nm 450 - 1100 nm 400 - 1100 nm 700 - 1800 nmb
    Power Range
    (with Filter)    		 500 pW - 0.5 mW
    (Up to 50 mW)c    		 500 pW - 0.2 mW
    (Up to 20 mW)c    		 500 pW - 5 mW
    (Up to 500 mW)    		 5 nW - 5 mW
    (Up to 500 mW)
    Detector Type Si Photodiode (UV Extended) Si Photodiode Ge Photodiode
    Linearity ±0.5%
    Resolution 100 pWd 1 nWe
    Measurement Uncertaintyf ±3% (440 - 980 nm)
    ±5% (280 - 439 nm)
    ±7% (200 - 279 nm, 981 - 1100 nm)    		 ±3% (440 - 980 nm)
    ±5% (400 - 439 nm)
    ±7% (981 - 1100 nm)    		 ±5%
    Responsivityg (Click for Plot)
    Raw Data
    Raw Data
    Raw Data
    Coating/Diffuser Reflective ND (OD1.5)c Reflective ND (OD2)h Absorptive ND (Schott NG9/KG3)b
    Housing Dimensions 150 mm x 19 mm x 10 mm; 5 mm Thickness on Sensor Side
    Cable Length 1.5 m
    Post Mounting 8-32 and M4 Taps
    Adapters (Not Included) SM1A29: Add SM1 Thread and Viewing Target to Aperture
    Fiber Adapters Compatible with SM1A29 Adapter: S120-FC2, S120-FC, S120-APC2, S120-APC, S120-SMA, S120-ST, S120-SC, and S120-LC
    FBSM: Integrate Sensor into FiberBench Setups
    Compatible Consoles PM400, PM100D, PM100USB, PM100A, and PM5020
    Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM103, PM103A, PM103E, PM103U, and PM100USB
    • For complete specifications, please see the Specs tab here.
    • For the S132C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had a reflective ND diffuser (OD1), which would decrease the wavelength range from 700 nm to 1800 nm to 1200 nm to 1800 nm. For additional information, please contact technical support.
    • For the S130VC, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had an optical power range of 5 nW to 5 mW (50 nW to 50 mW with filter) and a reflective ND diffuser (OD1). For additional information, please contact technical support.
    • Measured with PM100D console in low bandwidth setting, without filter.
    • Measured with PM100D console in low bandwidth setting at 1550 nm, without filter.
    • Beam Diameter > 1 mm.
    • All sensor responsivities are calibrated to a NIST-traceable source with measurements taken in 5 nm intervals.
    • For the S130C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had an absorptive ND diffuser (Schott NG9). For additional information, please contact technical support.
    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    S130VC Support Documentation
    S130VCSlim Photodiode Power Sensor, UV-Extended Si, 200 - 1100 nm, 500 pW - 0.5 mW, Up to 50 mW with Filter
    		$767.74
    Lead Time
    S130C Support Documentation
    S130CSlim Photodiode Power Sensor, Si, 400 - 1100 nm, 500 pW - 5 mW, Up to 500 mW with Filter
    		$634.26
    Lead Time
    S132C Support Documentation
    S132CSlim Photodiode Power Sensor, Ge, 700 - 1800 nm, 5 nW - 5 mW, Up to 500 mW with Filter
    		$901.20
    Lead Time
    SM1A29 Support Documentation
    SM1A29Customer Inspired! SM1 Thread Adapter for Slim Photodiode Sensors
    		$52.44
    Today
    FBSM Support Documentation
    FBSMFiberBench Mount for Slim Photodiode Sensors
    		$52.10
    Today

    Compact Slim Photodiode Power Sensor

    Table 728A  Specifications
    Item #a S116C
    Sensor Image
    (Click the Image to Enlarge)

    S116C
    Aperture Size Ø6 mm
    Wavelength Range 400 - 1100 nm
    Power Range 20 nW - 50 mW
    Detector Type Si Photodiode
    Linearity ±0.5%
    Resolution 1 nWb
    Measurement Uncertaintyc ±3% (440 - 980 nm)
    ±5% (400 - 439 nm)
    ±7% (981 - 1100 nm)
    Responsivityd
    (Click for Plot)    		 Typical Responsivity
    Raw Data
    Coating/Diffuser Absorptive ND (NG9)
    Housing Dimensions
    (L x W x T)    		 70.0 mm x 11.0 mm x 8.9 mm;
    10.0 mm Width and 4.5 mm Thickness on Sensor Side
    Active Detector Area 7 mm x 7 mm
    Cable Length 1.5 m
    Mounting Threads 2 Universal 8-32 / M4 Taps
    (One on the Back, One on the Bottom),
    Posts Not Included
    Adapters
    (Not Included)    		 SM05A29: Add SM05 Thread to Aperture
    Fiber Adapters Compatible with SM05A29 Adapter:
    PM20-FC2, PM20-FC, PM20-APC2, PM20-APC,
    PM20-SMA, PM20-ST, PM20-SC, and PM20-LC
    Compatible Consoles PM400, PM100D, PM100A, and PM5020
    Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM103, PM103A, PM103E, PM103U, and PM100USB
    • For complete specifications, please see the Specs tab here.
    • Measured with PM100D console in low bandwidth setting.
    • Beam Diameter > 1 mm.
    • The sensor responsivity shown in these plots were calibrated to a NIST-traceable source with measurements taken in 5 nm intervals.
    SM1A29 is an adapter that can be attached by 2 set screws to any S130 series power sensor. This gives the possibility to mount fiber adapters, light shields, filters or any other SM1 threaded mechanics or optics.
    • For Optical Power Measurements in Tiny Spaces Such as 16 mm Cage Systems
    • Wavelength Range: 400 - 1100 nm
    • Very Slim Design: 10.0 mm Wide and 4.5 mm Thin on Sensor Side
    • Silicon Photodiode with Ø6 mm Sensor Aperture
    • Designed for Power Measurements for Low Power Lasers
    • Post Mountable via 8-32 (M4) Taps
    • SM05A29 Adapter with External SM05 (0.535"-40) Threading Available Separately (More Details)
    • See the Full Web Presentation for More Information

    The S116C Compact Slim Photodiode Power Sensor is designed to take optical source power measurements in locations where space and accessibility are at a premium. The 4.5 mm thin photodiode sensor can fit between the rods of a 16 mm cage system, as seen in Figure 728C, as well as through the side openings of our slotted Ø1/2" lens tubes (Item #s SM05L20C and SM05L30C). This sensor also features a Ø6 mm sensor aperture.

    A separately available SM05A29 adapter can be attached by two 0.05" (1.3 mm) hex setscrews to an S116C power sensor to mount fiber adapters, light shields, filters or any other SM05-threaded (0.535"-40) mechanics or optics. The adapter mounted on the S116C power sensor is shown in Figure 728B.

    Each sensor is shipped with NIST- and PTB-traceable calibration data. The included data is determined with the help of a certified reference diode, which corresponds to the spectral range of the sensor to be calibrated. Thorlabs offers recalibration services for these photodiode power sensors, which can be ordered below (see Item #s CAL-PD or CAL-PDD for Si sensors).


    Click to Enlarge
    View Imperial Product List
    Item #QtyDescription
    Imperial Product List
    S116C1Compact Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 20 nW - 50 mW
    MSH21Swivel-Base Mini-Series Post Holder, 2" (51 mm) Tall, #4 (M3) Slot
    MS1R1Mini-Series Optical Post, Ø6 mm, L = 1"
    SC6W116 mm Cage Cube
    SCP05116 mm Cage System, XY Translating Lens Mount for Ø1/2" Optics
    KC05-T1SM05 Threaded Kinematic Cage Mount, Ø1/2" Optics
    TR11Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 1"
    SR4-P42Compact Cage Assembly Rod, 4" Long, Ø4 mm, 4 Pack
    PH1.51Ø1/2" Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L = 1.5"
    BA21Mounting Base, 2" x 3" x 3/8"
    View Metric Product List
    Item #QtyDescription
    Metric Product List
    S116C1Compact Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 20 nW - 50 mW
    MSH21Swivel-Base Mini-Series Post Holder, 2" (51 mm) Tall, #4 (M3) Slot
    MS1R/M1Mini-Series Optical Post, Ø6 mm, L = 25 mm
    SC6W116 mm Cage Cube
    SCP05116 mm Cage System, XY Translating Lens Mount for Ø1/2" Optics
    KC05-T/M1SM05 Threaded Kinematic Cage Mount, Ø1/2" Optics, Metric
    TR30/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 30 mm
    SR4-P42Compact Cage Assembly Rod, 4" Long, Ø4 mm, 4 Pack
    PH40/M1Ø12.7 mm Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L=40 mm
    BA2/M1Mounting Base, 50 mm x 75 mm x 10 mm
    Figure 728C  S116C Sensor in a 16 mm Cage System

    Click for Details
    Figure 728B  SM05A29 SM05 Thread Adapter (Sold Separately) Mounted on an S116C Sensor
    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    S116C Support Documentation
    S116CCompact Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 20 nW - 50 mW
    		$469.85
    Today
    SM05A29 Support Documentation
    SM05A29SM05-Threaded Adapter for Compact Slim Photodiode Sensors
    		$49.33
    Today

    Microscope Slide Photodiode Power Sensors

    Microscope Beam Alignment
    Click for Details
    Figure 616A  Using the engraved alignment target on the back of the sensor housing, a user can position the stage so that when the sensor is flipped, the beam strikes the center of the sensor. The S170C sensor is shown in this image.
    • Designed to Measure Optical Power at the Sample Plane of a Microscope
    • Silicon Photodiode with Large 18 mm x 18 mm Active Area
    • Sensor Housing Dimensions: 76.0 mm x 25.2 x 5.0 mm
    • Novel Optical Design Accommodates High NA Objectives
    • Information Stored in Connector
      • Sensor Data
      • NIST- and PTB-Traceable Calibration Data
    • Post Mountable via 8-32 (M4 x 0.7) Tap

    The Microscope Slide Power Sensor Heads with silicon photodiodes are designed to measure the power at the sample plane in microscopy setups. The S170C sensor can detect wavelengths from 350 nm to 1100 nm at optical powers from 10 nW to 150 mW. The NS170C sensor is designed to measure the relative peak power of femtosecond lasers with center wavelengths from 780 nm to 1300 nm and average powers from 0.5 mW to 350 mW. Each sensor head's 76.0 mm x 25.2 mm footprint matches that of a standard microscope slide and is compatible with most standard upright and inverted microscopes.

    The photodiode used in the S170C sensor has 18 mm x 18 mm active area and is contained in a sealed housing behind a neutral density (ND) filter. A 20 mm x 20 mm indentation around the surface of the ND filter is sized to accept standard microscope cover slips. An immersion medium (water, glycerol, oil) may be placed in this well directly over the ND filter, or a cover slip may be inserted first to simplify clean up. The gap between the photodiode and the neutral density filter has been filled with an index matching gel in order to prevent internal reflections from causing significant measurement errors when using high NA objectives with oil or water.

    The NS170C sensor is designed to measure the relative peak power of two-photon lasers by utilizing a second-order nonlinear β-BBO crystal to convert incident ultrafast NIR pulses into their visible second harmonic. Shortpass filters underneath the β-BBO crystal reject the residual NIR light, allowing only the second harmonic light to transmit down to a large area silicon photodiode sensor. At the entrance of the sensor is a 170 µm thick cover glass sealed to the sensor housing, allowing the sensor to be used with dry, water immersion, and oil immersion objectives. The working distance from the top of the cover glass to the β-BBO crystal is 0.22 mm.

    The bottom of each sensor housing features a laser-engraved grid to aid in aligning and focusing the beam. In standard microscopes, this grid can be used for beam alignment before flipping the sensor head to face the objective for power measurements. In inverted microscopes, turn on the transmitted illuminator to align the grid on the detector housing with the beam, thereby centering the sensor in front of the objective. Alternatively, the diffusive surface of the ND filter can be used as a focusing plane.

    To avoid damaging the sensor, we recommend positioning it in the light path at a location where the beam is not focused. It is important not to exceed the Max Average Power Density over the beam's spot size for the S170C sensor, and the Max Peak Power Density for the NS170C sensor (see Specs tab).

    Each sensor is shipped with NIST- or PTB-traceable calibration data. The included data will match the calibration certification of the photodiode used to test the individual sensor. Sensor specifications and the included NIST- or PTB-traceable calibration data are stored in non-volatile memory in the sensor connector and can be read out by the latest generation of Thorlabs power meters. Please note that the NS170C sensor's NIST and PTB calibration is for the visible light incident on the detector; however, the magnitude of that visible light is specific to the illumination conditions of the NIR femtosecond pulses. We recommend yearly recalibration to ensure accuracy and performance, which can be ordered below (see Item #s CAL-PD or CAL-PDD for the S170C sensor, and Item # CAL-NS for the NS170C sensor). Please contact Tech Support for more information.

    The complete set of specifications are presented on the Specs tab. Thorlabs also offers a Microscope Slide Sensor Head with a thermal sensor; the full presentation can be found here.

    Item #a S170C NS170C
    Sensor Image
    (Click Image to Enlarge)    		 S170C Microscope Slide Power Head NS170C Microscope Slide Power Head
    Dimensions 76.0 mm x 25.2 mm x 5.0 mm
    (2.99" x 0.99" x 0.20")    		 Base: 76.0 mm x 25.2 mm x 5.0 mm
    (2.99" x 0.99" x 0.20")
    Overall: 76.0 mm x 30.0 mm x 11.0 mm
    (2.99" x 1.18" x 0.43")
    Active Detector Area 18 mm x 18 mm
    Input Aperture 20 mm x 20 mm Ø4.5 mm
    Wavelength Range 350 - 1100 nm Laser: 780 - 1300 nm
    SHG: 390 - 650 nm
    Optical Power Working Range 10 nW - 150 mW Laser: 0.5 - 350 mWb
    SHG: 10 nW - 5 mW
    Max Peak Power Densityc - 10 TW/cm2
    Detector Type Silicon Photodiode Second-Order Nonlinear Crystal
    with Silicon Photodiode
    Linearity ±0.5% ±0.5%d
    Resolution 1 nWe 1 nWd,e
    Measurement Uncertaintyf ±3% (440 - 980 nm)
    ±5% (350 - 439 nm)
    ±7% (981 - 1100 nm)    		 ±3% (440 - 650 nm)d
    ±5% (390 - 439 nm)d
    Responsivityg
    (Click for Plot)    		 Typical Responsivity
    Raw Data    		 Typical Responsivity
    Raw Data
    Neutral Density Filter Reflective (OD 1.5) N/A
    Cable Length 1.5 m
    Mounting Thread Universal 8-32 / M4 x 0.7 Tap, Post Not Included
    Compatible Consoles PM400, PM100D, PM100A, and PM5020
    Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM103, PM103A, PM103E, PM103U, and PM100USB
    • For complete specifications, please see the Specs tab.
    • The working range provided is for lasers with a repetition rate of 80 MHz. Because the peak power and peak power density are dependent on the average power and repetition rate of the laser, the upper limit to the working average power range will be lower for lower repetition rates. Exceeding the maximum average power may result in damage to the sensor's optical components.
    • The specified damage threshold is for objectives with NA > 0.5. The damage threshold will be lower for NA < 0.5.
    • This specification is for the measured second harmonic generation (SHG) signal.
    • Measured with PM100D console in low bandwidth setting.
    • Beam Diameter >1 mm
    • The sensor responsivity shown in this plot was calibrated to a NIST-traceable source with measurements taken in 5 nm intervals.
    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    S170C Support Documentation
    S170CCustomer Inspired! Microscope Slide Power Sensor, 350 - 1100 nm, 10 nW - 150 mW
    		$1,417.25
    Lead Time
    NS170C Support Documentation
    NS170CMicroscope Slide Peak Power Sensor for Two-Photon Lasers, 780 - 1300 nm
    		$2,835.50
    Today

    Microscope Slide Thermal Power Sensor

    Table 617B  Specifications
    Item #a S175C
    Sensor Image
    (Click Image to Enlarge)    		 Microscope Thermal Sensor
    Active Detector Area 18 mm x 18 mm
    Wavelength Range 0.3 - 10.6 µm
    Power Range 100 µW - 2 W
    Detector Type Thermal Surface Absorber (Thermopile)
    Linearity ±0.5%
    Resolutionb 10 µW
    Measurement Uncertaintyc ±3% @ 1064 nm;
    ±5% @ 300 nm - 10.6 µm
    Response Time 3 s
    (<2 s from 0 to 90%)
    Housing Dimensions 76 mm x 25.2 mm x 4.8 mm
    (2.99" x 0.99" x 0.19") 
    Cable Length 1.5 m
    Housing Features Integrated Glass Cover
    Engraved Laser Target on Back
    Post Mounting N/A
    Cage Mounting N/A
    Aperture Thread N/A
    Compatible Consoles PM400, PM100D, PM100A, and PM5020
    Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM102, PM102A, PM102U, and PM100USB
    • For complete specifications, please see the Specs tab here.
    • Measured with the legacy PM200 Touch Screen Console
    • Beam Diameter: >1 mm

    Click to Enlarge
    Figure 617A  Typical absorption curve for the S175C (glass and absorber). Note that this curve is representative, and the actual absorption across the spectrum will vary from unit to unit.
    Microscope Thermal Sensor
    Click to Enlarge
    Figure 617C  The back of the S175C housing is engraved with the sensor specifications and a target for centering the beam on the sensor.
    • Wavelength Range: 300 nm - 10.6 µm
    • Sensitive to Optical Powers from 100 µW to 2 W
    • Designed to Measure Optical Power in the Sample Plane of a Microscope
    • Thermal Sensor with 18 mm x 18 mm Active Area
    • 76.0 mm x 25.2 mm Footprint Matches Standard Microscope Slides
    • Information Stored in Connector
      • Sensor Data
      • NIST- and PTB-Traceable Calibration Data
    • See the Full Web Presentation for More Information

    The S175C Microscope Slide Thermal Power Sensor Head is designed to measure the power at the sample in microscopy setups. The thermal sensor can detect wavelengths between 300 nm and 10.6 µm at optical powers between 100 µW and 2 W. The sensor head's 76.0 mm x 25.2 mm footprint matches that of a standard microscope slide and is compatible with most standard upright and inverted microscopes.

    The thermal sensor has an 18 mm x 18 mm active area and is contained in a sealed housing behind a glass cover. An immersion medium (water, glycerol, oil) may be placed over the glass cover plate.

    As seen in Figure 617C, the bottom of the sensor housing features a laser-engraved target to aid in aligning and focusing the beam. In standard microscopes, the target can be used for beam alignment before flipping the sensor head to face the objective for power measurements. In inverted microscopes, turn on the trans-illumination lamp and align the target on the detector housing with the beam; this will center the sensor in front of the objective.

    Sensor specifications and the NIST- and PTB-traceable calibration data are stored in non-volatile memory in the sensor connector and can be read out by the latest generation of Thorlabs power meters. We recommend yearly recalibration to ensure accuracy and performance. Calibration may be ordered using the CAL-THPY recalibration service available below. Please contact technical support for more information.

    Thorlabs also offers a Microscope Slide Sensor Head with a photodiode sensor for low-power, high-resolution measurements; the full presentation may be found here.

    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    S175C Support Documentation
    S175CCustomer Inspired! Microscope Slide Thermal Power Sensor, 300 nm - 10.6 µm, 100 µW - 2 W
    		$1,417.25
    Lead Time

    Integrating Sphere Photodiode Power Sensors

    S142C and S140-BFA Bare Fiber Adapter
    Click to Enlarge
    Figure 618B  S142C and S140-BFA Bare Fiber Adapter (Sold Separately)
    S142C and S120-FC Fiber Adapter
    Click to Enlarge
    Figure 618A  S142C with the S120-FC Fiber Adapter (Included)
    • For Measurements Independent of Beam Shape and Entrance Angle
    • Integrating Sphere Design Acts as a Diffuser with Minimal Power Loss
    • Ø5 mm, Ø7 mm, Ø12 mm, or Ø22 mm Input Sensor Aperture
    • Spheres with Apertures ≤Ø12 mm Include a Removable S120-FC Fiber Adapter (FC/PC and FC/APC)  
    • Fiber Adapters for Terminated and Bare Fiber (See Table 618D) are Compatible with Spheres with Apertures ≤Ø12 mm
    • See the Full Web Presentation for More Information

    These Integrating Sphere Photodiode Power Sensors are the ideal choice for power measurements independent of beam uniformity, divergence angle, beam shape, or entrance angle, making them excellent for use with fiber sources and off-axis free space sources. They feature enhanced shielding to avoid electromagnetic interference and an over-temperature alert sensor to warn against damage and measurement errors due to overheating of the sensor.

    Our integrating spheres are designed for wavelength ranges from the visible through the NIR. Sensor heads for use between 350 and 2500 nm use a single Ø1" or Ø2" sphere made from Zenith® PTFE and feature a black housing to minimize reflected light around the entrance aperture. These sensors use either a silicon photodiode for detection in the 350 - 1100 nm range or an InGaAs photodiode for detection in the 800 - 1700 nm, 900 - 1650 nm, or 1200 - 2500 nm wavelength range.

    The S180C integrating sphere for 2.9 - 5.5 µm uses two connected, gold-plated Ø20 mm spheres, with an entrance port in the first sphere and a port for the MCT (HgCdTe) detector located in the second sphere. Compared to single-sphere designs, the two-sphere configuration improves device sensitivity by minimizing the internal sphere surface area while still effectively shielding the detector from direct illumination. This design reduces the effect of input angle, divergence, and beam shape on the measurement result by effectively shielding the photodiode without the use of a baffle or other shielding mechanism.

    S142CL and S145CL Baffle
    Click to Enlarge
    Figure 618C  A baffle on the S142CL and S145CL spheres blocks light from directly hitting the detector.

    The integrating spheres with Ø5 mm, Ø7 mm, or Ø12 mm apertures feature large active detector areas, and externally SM1-threaded (1.035"-40) adapters for compatibility with the included S120-FC fiber adapter. Because of the large active detector areas of these sensors, the included S120-FC fiber adapter can be used with FC/PC- or FC/APC-terminated fiber. The externally SM1-threaded adapter can be removed using a size 1 screwdriver to place components closer to the window.

    The S142CL and S145CL integrating spheres feature a large Ø22 mm input aperture and a baffle within the sphere which prevents direct illumination of the photodiode. The large aperture and baffle enable measurements of large and divergent beams, such as those emitted from LED and VCSEL light sources. The input face of the detectors have four 4-40 threads for mounting 30 mm cage system components. Additionally, insertion of a second or third port in the sensor head is possible on request, please contact Tech Support for details.

    Each sensor is shipped with NIST- or PTB-traceable calibration data. The included data will match the calibration certification of the photodiode used to test the individual sensor. NIST- or PTB-traceable data is stored in the sensor connector. Thorlabs offers recalibration services for these photodiode power sensors, which can be ordered below (see Item #s CAL-PD or CAL-PDD for Si sensors, Item #s CAL-IRPD or CAL-IRPDD for InGaAs sensors, Item # CAL-MIRPD for extended InGaAs or MCT sensors, or Item # CAL-MIRPDD for extended InGaAs sensors).

    Table 618D  Specifications
    Item #a S140C S142C S142CL S144C S145C S145CL S146C S148C S180C
    Sensor Image
    (Click the Image
    to Enlarge)    		 S140C S142C S142CL S144C S145C S145CL S146C S144C Mid-IR Detector
    Aperture Size Ø5 mm Ø12 mm Ø22 mm Ø5 mm Ø12 mm Ø22 mm Ø12 mm Ø5 mm Ø7 mm
    Wavelength Range 350 - 1100 nm 400 - 1100 nm 800 - 1700 nm 900 - 1650 nm 1200 - 2500 nm 2.9 µm - 5.5 µm
    Power Range 1 µW - 500 mW 1 µW - 5 W 10 µW - 5 W 1 µW - 500 mW 1 µW - 3 W 10 µW - 3 W 10 µW - 20 W 1 µW - 1 W 1 µW - 3 W
    Detector Type Si Photodiode Si Photodiode with Baffle InGaAs Photodiode InGaAs Photodiode with Baffle InGaAs Photodiode Extended InGaAs Photodiode MCT (HgCdTe)
    Photodiode
    Linearity ±0.5%
    Resolutionb 1 nW 10 nW 1 nW 10 nW 1 nW 10 nW
    Measurement
    Uncertaintyc,d    		 ±3% (440 - 980 nm)
    ±5% (350 - 439 nm)
    ±7% (981 - 1100 nm)    		 ±3%
    (440 - 980 nm)
    ±5%
    (400 - 439 nm)
    ±7%
    (981 - 1100 nm)    		 ±5%
    Responsivitye
    (Click for Plot)
    Raw Data
    Raw Data
    Raw Data
    Raw Data
    Raw Data
    Raw Data
    Raw Data
    Raw Data
    Raw Data
    Integrating Sphere
    Material     (Size)    		 Zenith® PTFE
    (Ø1")    		 Zenith® PTFE
    (Ø2")    		 Zenith® PTFE
    (Ø1")    		 Zenith® PTFE
    (Ø2")    		 Zenith® PTFE
    (Ø1")    		 Gold Plating
    (Two Ø20 mm Spheres)
    Head Temperature
    Measurement    		 NTC Thermistor 4.7 kΩ
    Housing
    Dimensions    		 Ø45 mm x 30.5 mm 70 mm x 74 mm x 70 mm Ø45 mm x 30.5 mm 70 mm x 74 mm x 70 mm Ø45 mm x 30.5 mm 59.0 mm x 50.0 mm x
    28.5
    Active Detector Area 3.6 mm x 3.6 mm Ø2 mm Ø3 mm Ø1 mm Ø1 mm 1 mm x 1 mm
    Cable Length 1.5 m
    Mounting Thread Separate 8-32 and M4 Taps, Posts Not Included Universal 8-32 / M4 Thread, Post Not Included Separate 8-32 and M4 Taps, Posts Not Included Universal 8-32 / M4 Thread, Post Not Included Separate 8-32 and M4 Taps, Posts Not Included Universal 8-32 / M4 Tap, Post Not Included
    Aperture Thread Included Adapter with SM1 (1.035"-40) External Thread None Included Adapter with SM1 (1.035"-40) External Thread None Included Adapter with SM1 (1.035"-40) External Thread
    Compatible Fiber
    Adapters    		 S120-FC (Included)
    S120-FC2, S120-APC2, S120-APC, S120-SMA, S120-ST, S120-SC, S120-LC, S120-25, and S140-BFA (Not Included)    		 None S120-FC (Included)
    S120-FC2, S120-APC2, S120-APC, S120-SMA, S120-ST, S120-SC, S120-LC, S120-25, and S140-BFA (Not Included)    		 None S120-FC (Included)
    S120-FC2, S120-APC2, S120-APC, S120-SMA, S120-ST, S120-SC, S120-LC, S120-25, and S140-BFA (Not Included)
    Compatible Consoles PM400, PM100D, PM100A, and PM5020
    Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM103, PM103A, PM103E, PM103U, and PM100USB
    • For complete specifications, please see the Specs tab here.
    • Measured with PM100D console in low bandwidth setting.
    • Beam diameter > 1 mm
    • Uncertainties for S142CL and S145CL are valid at a temperature of 24 °C ± 2 °C.
    • All sensor responsivities are calibrated to a NIST-traceable source with measurements taken in 5 nm intervals except for the S180C. See the S180C responsivity graph to see the NIST-traceable reference points.
    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    S140C Support Documentation
    S140CIntegrating Sphere Photodiode Power Sensor, Si, 350 - 1100 nm, 1 µW - 500 mW
    		$875.77
    Lead Time
    S142C Support Documentation
    S142CIntegrating Sphere Photodiode Power Sensor, Si, 350 - 1100 nm, 1 µW - 5 W
    		$1,215.15
    Lead Time
    S142CL Support Documentation
    S142CLCustomer Inspired! Large Aperture Integrating Sphere Photodiode Power Sensor, Si, 400 - 1100 nm, 10 µW - 5 W
    		$1,309.68
    Lead Time
    S144C Support Documentation
    S144CIntegrating Sphere Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 1 µW - 500 mW
    		$1,028.31
    Lead Time
    S145C Support Documentation
    S145CIntegrating Sphere Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 1 µW - 3 W
    		$1,262.18
    Lead Time
    S145CL Support Documentation
    S145CLCustomer Inspired! Large Aperture Integrating Sphere Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 10 µW - 3 W
    		$1,358.79
    Today
    S146C Support Documentation
    S146CIntegrating Sphere Photodiode Power Sensor, InGaAs, 900 - 1650 nm, 10 µW - 20 W
    		$1,262.18
    Lead Time
    S148C Support Documentation
    S148CCustomer Inspired! Integrating Sphere Photodiode Power Sensor, Extended InGaAs, 1200 - 2500 nm, 1 µW - 1 W
    		$1,056.27
    Lead Time
    S180C Support Documentation
    S180CIntegrating Sphere Photodiode Power Sensor, MCT (HgCdTe), 2.9 - 5.5 µm, 1 µW - 3 W
    		$4,592.40
    Today

    Fiber Photodiode Power Sensors

    S150C and PM100D
    Click to Enlarge
    Figure 619A  PM100D with S150C Sensor and FC Cable
    • For Fiber-Based Optical Power Measurements
    • Compact Sensor Integrated into the Connector
    • Integrated Design for Use in the Field and Lab
    • Includes PM20-FC Fiber Adapter
      • S150C and S151C Sensors also Include PM20-SMA Adapters
      • Compatible FC/APC, LC/PC, SC/PC, and ST®* Fiber Adapters Also Available (See Table 619B)
    • See the Full Web Presentation for More Information

    The S15xC Compact Fiber Photodiode Power Sensor is designed to take power measurements from a wide variety of fiber coupled sources. The compact sensor, integrated into the power meter connector, features a unique integrated design housing the photodiode sensor, fiber coupling, and NIST-traceable data. Standard FC (and SMA - S150C and S151C) connectors are easily interchanged with a variety of standard fiber connectors.

    Thorlabs offers recalibration services for these photodiode power sensors, which can be ordered below (see Item #s CAL-PD or CAL-PDD for Si sensors and Item #s CAL-IRPD or CAL-IRPDD for InGaAs sensors).

    *ST® is a registered trademark of Lucent Technologies, Inc.

    Table 619B  Specifications
    Item #a S150C S151C S154C S155C
    Sensor Image
    (Click the Image to Enlarge)

    S150C

    S151C

    S152C

    S153C
    Included Connectors FCb & SMA FCb
    Wavelength Range 350 - 1100 nm 400 - 1100 nm 800 - 1700 nm
    Power Range 100 pW to 5 mW
    (-70 dBm to +7 dBm)    		 1 nW to 20 mW
    (-60 dBm to +13 dBm)    		 100 pW to 3 mW
    (-70 dBm to +5 dBm)    		 1 nW to 20 mW
    (-60 dBm to +13 dBm)
    Detector Type Si Photodiode InGaAs Photodiode
    Linearity ±0.5%
    Resolutionc 10 pW (-80 dBm) 100 pW (-70 dBm) 10 pW (-80 dBm) 100 pW (-70 dBm)
    Measurement Uncertaintyd ±3% (440 - 980 nm)
    ±5% (350 - 439 nm)
    ±7% (981 - 1100 nm)    		 ±3% (440 - 980 nm)
    ±5% (400 - 439 nm)
    ±7% (981 - 1100 nm)    		 ±5%
    Responsivityf (Click for Details)
    Raw Data
    Raw Data
    Raw Data
    Raw Data
    Coating/Diffuser N/A Absorptive ND (Schott NG3) N/A
    Head Temperature Measuremente NTC Thermistor 3 kΩ
    Aperture Thread External SM05 (0.535"-40)
    Fiber Adapters Included: PM20-FC and PM20-SMA
    Optional: PM20-FC2, PM20-APC2, PM20-APC, PM20-ST,
    PM20-SC, and PM20-LC    		 Included: PM20-FC
    Optional: PM20-FC2, PM20-APC2, PM20-APC, PM20-SMA, 
    PM20-ST, PM20-SC, and PM20-LC
    Compatible Consoles PM400, PM100D, PM100A, and PM5020
    Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM103, PM103A, PM103E, PM103U, and PM100USB
    • For complete specifications, please see the Specs tab here.
    • Because of the large active detector area of these sensors, the included PM20-FC fiber adapter can be used with both FC/PC- and FC/APC-terminated fiber. 
    • Measured with PM100D console in low bandwidth setting.
    • For a beam diameter > 1 mm incident on the active area of the detector (i.e. at the detector surface after the light has exited the fiber and passed through any internal optics).
    • This specification is valid for devices with serial numbers 1203xxx and higher. For older versions, please contact technical support.
    • All sensor responsivities are calibrated to a NIST-traceable source with measurements taken in 5 nm intervals.
    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    S150C Support Documentation
    S150CCompact Fiber Photodiode Power Sensor, Si, 350 - 1100 nm, 100 pW - 5 mW
    		$381.34
    Today
    S151C Support Documentation
    S151CCompact Fiber Photodiode Power Sensor, Si, 400 - 1100 nm, 1 nW - 20 mW
    		$434.72
    Today
    S154C Support Documentation
    S154CCompact Fiber Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 100 pW - 3 mW
    		$547.83
    Lead Time
    S155C Support Documentation
    S155CCompact Fiber Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 1 nW - 20 mW
    		$627.92
    Lead Time

    High-Resolution Thermal Power Sensors

    Table 624A  Specifications
    Item #a S401C S405C
    Sensor Image
    (Click the Image to Enlarge)    		 S401C S405C
    Wavelength Range 190 nm - 20 µm 190 nm - 20 µm
    Optical Power Range 10 µW - 1 W (3 Wb) 100 µW - 5 W 
    Input Aperture Size Ø10 mm Ø10 mm
    Active Detector Area
    		 10 mm x 10 mm 10 mm x 10 mm
    Max Optical Power Density 500 W/cm2 (Avg.) 1.5 kW/cm2 (Avg.)
    Detector Type Thermal Surface Absorber (Thermopile)
    with Background Compensation    		 Thermal Surface Absorber (Thermopile)
    Linearity ±0.5% ±0.5%
    Resolutionc 1 µW 5 µW
    Measurement Uncertaintyd ±3% @ 1064 nm
    ±5% @ 190 nm - 10.6 µm    		 ±3% @ 1064 nm 
    ±5% @ 250 nm - 17 µm
    Response Timee 1.1 s 1.1 s
    Cooling Convection (Passive)
    Housing Dimensions
    (Without Adapter)    		 33.0 m x 43.0 mm x 15.0 mm
    (1.30" x 1.69" x 0.59")    		 40.6 mm x 40.6 mm x 16.0 mm
    (1.60" x 1.60" x 0.63")
    Temperature Sensor
    (In Sensor Head)    		 NTC Thermistor NTC Thermistor
    Cable Length 1.5 m
    Post Mounting Universal 8-32 / M4 Taps
    (Post Not Included)    		 Universal 8-32 / M4 Taps
    (Post Not Included)
    30 mm Cage Mounting - Two 4-40 Tapped Holes &
    Two Ø6 mm Through Holes
    Aperture Threads - Internal SM05
    Accessories Externally SM1-Threaded Adapter
    Light Shield with Internal SM05 Threading    		 Externally SM1-Threaded Adapter
    Compatible Consoles PM400, PM100D, PM100A, and PM5020
    Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM102, PM102A, PM102U, and PM100USB
    • For complete specifications, please see the Specs tab here.
    • For conditions of intermittent use, with a maximum exposure time of 20 minutes for the S401C. The S405C saturates for optical input powers >5 W.
    • Measurement taken with the legacy PM200 console for the S401C and the PM400 console for the S405C. In all cases, the acceleration circuit was switched off. Resolution performance will be similar with our other power meter consoles.
    • Defined as the measurement uncertainty during calibration at the specified wavelengths for a beam diameter > 1 mm. The ±3% specification was determined by laser calibration, and the ±5% specification was determined through spectral calibration, in which values were interpolated using the laser calibration data and the absorption curve for the absorber. Calibration can be performed at 10.6 µm upon request. 
    • Typical natural response time (0 - 95%). Our power consoles can provide estimated measurements of optical power on an accelerated time scale (typically <1 s). See the Operation tab for additional information.
    • High Resolution of 1 μW or 5 μW
    • S401C and S405C Have Thermistors Used to Monitor Temperature of Sensor Head
    • S401C: Background Compensation for Low-Drift Measurements
    • S405C: Accommodates Average Optical Power Densities Up to 1.5 kW/cm2;
    • See the Full Web Presentation for More Information

    Click to Enlarge
    Figure 624B  S401C Thermal Sensor with Included Light Shield

    Thorlabs offers two broadband thermal power sensors designed to measure low optical power sources with high resolution. Each thermal sensor's broadband coating has a flat spectral response over a wide wavelength range, as shown in Figure 624C.

    An aperture size of Ø10 mm allows for easy alignment and measurement of large-spot-size laser sources. For easy integration with Thorlabs' lens tube systems and SM1-threaded (1.035"-40) fiber adapters, each sensor has either external SM1 threading or includes an externally SM1-threaded adapter.

    The S401C uses active thermal background compensation to provide low-drift power measurements. This is implemented through the use of two similar sensor circuits. One sensor circuit is the type all thermal power sensors share: it measures heat flow from light absorber to heat sink. The other sensor circuit monitors the ambient temperature. It is located within the housing and measures heat flow from heat sink towards the absorber. The measurements of the two sensor circuits are subtracted, which minimizes the effect of thermal drift on the laser power measurement. (For information about how the external thermal disturbances can affect thermal power sensor readings, see the Operation tab.) The broadband coating used on this thermal sensor offers high absorption at wavelengths between 0.19 and 20 µm (shown in the graph), which makes the sensor ideal for use with aligning and measuring Mid-IR Quantum Cascade Lasers (QCLs). The included, internally SM05-threaded (0.535"-40) light shield is shown in Figure 624B.

    The S405C has internal SM05 (0.535"-40) threading that is directly compatible with SM05 lens tubes, and it can also connect directly to Thorlabs' 30 mm Cage Systems.

    Thorlabs offers a recalibration service for these sensors, which can be ordered below (see Item # CAL-THPY).

    Low Power High Resolution Thermal Sensor Absorption
    Click to Enlarge
    Figure 624C  The S405 shares the same absorption curve with the S415C, S425C, and S245C-L. (All are sold below.)
    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    S401C Support Documentation
    S401CThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 10 µW - 1 W, Ø10 mm
    		$922.80
    Today
    S405C Support Documentation
    S405CThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 100 µW - 5 W, Ø10 mm
    		$877.29
    Today

    Thermal Sensors for Max Powers of 10 W

    Table 620A  Specifications
    Item #a S415C S425C
    Sensor Image
    (Click Image to Enlarge)    		 S415C S425C
    Wavelength Range 190 nm - 20 µm 190 nm - 20 µm
    Optical Power Range 2 mW - 10 W (20 Wb) 2 mW - 10 W (20 Wb)
    Input Aperture Size Ø15 mm Ø25.4 mm
    Active Detector Area
    		 Ø15 mm Ø27 mm
    Max Optical
    Power Density     		 1.5 kW/cm2 (Avg.) 1.5 kW/cm2 (Avg.)
    Detector Type Thermal Surface Absorber (Thermopile)
    Linearity ±0.5% ±0.5%
    Resolutionc 100 µW 100 µW
    Measurement
    Uncertaintyd    		 ±3% @ 1064 nm
    ±5% @ 250 nm - 17 µm    		 ±3% @ 1064 nm
    ±5% @ 250 nm - 17 µm
    Response Timee 0.6 s 0.6 s
    Cooling Convection (Passive)
    Housing Dimensions
    (Without Adapter)    		 50.8 mm x 50.8 mm x 35.0 mm
    (2.00" x 2.00" x 1.38")    		 50.8 mm x 50.8 mm x 35.0 mm
    (2.00" x 2.00" x 1.38")
    Temperature Sensor
    (In Sensor Head)    		 NTC Thermistor
    Cable Length 1.5 m
    Post Mounting Universal 8-32 / M4 Taps
    (Post Not Included)    		 Universal 8-32 / M4 Taps
    (Post Not Included)
    30 mm Cage Mounting - -
    Aperture Threads Internal SM1 Internal SM1
    Removable Heatsink Yes Yes
    Accessories Externally SM1-Threaded Adapter Externally SM1-Threaded Adapter
    Compatible Consoles PM400, PM100D, PM100A, and PM5020
    Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM102, PM102A, PM102U, and PM100USB
    • For complete specifications, please see the Specs tab here.
    • Two Minute Maximum Exposure Time
    • Measurement taken with the PM400 with the acceleration circuit switched off. Resolution performance will be similar with our other power meter consoles.
    • Defined as the measurement uncertainty during calibration at the specified wavelengths for a beam diameter > 1 mm. The ±3% specification was determined by laser calibration, and the ±5% specification was determined through spectral calibration, in which values were interpolated using the laser calibration data and the absorption curve for the absorber. Calibration can be performed at 10.6 µm upon request.
    • Typical natural response time (0 - 95%). Our power consoles can provide estimated measurements of optical power on an accelerated time scale (typically <1 s). As the natural response times of the S415C and S425C are fast, these do not benefit from accelerated measurements and this function cannot be enabled. See the Operation tab for additional information.
    • 100 µW Optical Power Resolution
    • Thermistors Used to Monitor Temperature of Sensor Head
    • Removable Heat Sinks Included
    • See the Full Web Presentation for More Information

    These thermal power sensors are designed for general broadband power measurements of low and medium power light sources. All include an externally SM1-threaded (1.035"-40) adapter, with threading concentric with the input aperture. The adapters are useful for mounting Ø1" Lens Tubes and Fiber Adapters (available below). The apertures of the S415C and S425C have internal SM1 threading.

    These sensors operate with fast (<0.6 s) natural response times, and their removable heat sinks provide a high degree of flexibility to those interested in integrating them into custom setups or replacing the included heat sink with one that is water or fan cooled. If replacing the heat sink, please note that the replacement must provide heat dissipation adequate for the application.

    Thorlabs offers a recalibration service for these sensors, which can be ordered below (see Item # CAL-THPY).

    Thermal Sensor Absorption Mid-Power Thermal
    Click to Enlarge
    Figure 620B  The absorption curves of each of the thermal power sensors designed for use with low and medium power optical sources.
    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    S415C Support Documentation
    S415CThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 2 mW - 10 W, Ø15 mm
    		$904.71
    Today
    S425C Support Documentation
    S425CThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 2 mW - 10 W, Ø25.4 mm
    		$986.96
    Today

    Thermal Sensors for Max Powers from 40 W to 200 W

    Thermal Sensor Absorption Mid-Power Thermal
    Click to Enlarge
    Figure 621A  The absorption curves of each of the thermal power sensors designed for use with low and medium power optical sources.
    • Thermistors Used to Monitor Temperature of Sensor Head
    • S322C Has 4-40 Taps for Use with Our 30 mm Cage Systems
    • S350C Has Ø40 mm Aperture Well Suited to Excimer and Other Lasers with Large Spot Sizes
    • S425C-L Features Removable Heat Sink
    • S322C is Fan Cooled with an Optical Power Range Up to 200 W
    • See the Full Web Presentation for More Information

    These thermal power sensors are designed for general broadband power measurements of low and medium power light sources. With the exception of the S350C, all include an adapter with external SM1 (1.035"-40) threading concentric with the input aperture. This allows the sensors to be integrated into existing Ø1" lens tube systems in addition to being compatible with fiber adapters (available below). The aperture of the S425C-L has internal SM1 threading.

    The S425C-L operates with a fast (<0.6 s) natural response time and has a removable heat sink, which provides a high degree of flexibility to those interested in integrating them into custom setups or replacing the included heat sink with one that is water or fan cooled. If replacing the heat sink, please note that the replacement must provide heat dissipation adequate for the application.

    Thorlabs offers a recalibration service for these sensors, which can be ordered below (see Item # CAL-THPY).


    Table 621B  Specifications
    Item #a S350C S425C-L S322C
    Sensor Image
    (Click Image to Enlarge)    		 S350C S425C-L S322C
    Wavelength Range 190 nm- 1.1 µm, 10.6 µm 190 nm - 20 µm 250 nm - 11 µm
    Optical Power Range 10 mW - 40 W (60 Wb) 2 mW - 50 W (75 Wb) 100 mW - 200 W (250 Wb)
    Input Aperture Size Ø40 mm Ø25.4 mm Ø25 mm
    Active Detector Area
    		 Ø40 mm Ø27 mm Ø25 mm
    Max Optical Power Density 2 kW/cm2 (Avg.) 1.5 kW/cm2 (Avg.) 4 kW/cm2 (Avg., CO2) 
    Detector Type Thermal Surface Absorber (Thermopile)
    Linearity ±1% ±0.5% ±1%
    Resolutionc 1 mW 100 µW 5 mW
    Measurement Uncertaintyd ±3% @ 1064 nm
    ±5% @ 190 nm - 1100 nm, 10.6 µm    		 ±3% @ 1064 nm 
    ±5% @ 250 nm - 17 µm    		 ±3% @ 1064 nm
    ±5% @ 266 nm - 1064 nm
    Response Timee 9 s
    (1 s from 0 to 90%)    		 0.6 s 5 s
    (1 s from 0 to 90%)
    Cooling Convection (Passive) Forced Air with Fanf
    Housing Dimensions
    (Without Adapter, if Applicable)    		 100 mm x 100 mm x 54.2 mm
    (3.94" x 3.94" x 2.13")    		 100.0 mm x 100.0 mm x 58.0 mm
    (3.94" x 3.94" x 2.28")    		 100 mm x 100 mm x 86.7 mm
    (3.94" x 3.94" x 3.41")
    Temperature Sensor
    (In Sensor Head)    		 NTC Thermistor
    Cable Length 1.5 m
    Post Mounting M6 Threaded Taps, Includes
    Ø1/2" Post, 75 mm Long    		 Universal 8-32 / M4 Taps
    (Post Not Included)    		 M6 Threaded Taps, Includes
    Ø1/2" Post, 75 mm Long
    30 mm Cage Mounting - - Four 4-40 Tapped Holes
    Aperture Threads - Internal SM1 -
    Removable Heatsink - Yes -
    Accessories - Externally SM1-Threaded Adapter Externally SM1-Threaded Adapter
    Compatible Consoles PM400, PM100D, PM100A, and PM5020
    Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM102, PM102A, PM102U, and PM100USB
    • For complete specifications, please see the Specs tab here.
    • Two Minute Maximum Exposure Time
    • Measurement taken with the PM100D console, except for the S425C-L in which the PM400 was used. In all cases, the acceleration circuit was switched off. Resolution performance will be similar with our other power meter consoles.
    • Defined as the measurement uncertainty during calibration at the specified wavelengths for a beam diameter > 1 mm. The ±3% specification was determined by laser calibration, and the ±5% specification was determined through spectral calibration, in which values were interpolated using the laser calibration data and the absorption curve for the absorber. Calibration can be performed at 10.6 µm upon request.
    • Typical natural response time (0 - 95%). Our power consoles can provide estimated measurements of optical power on an accelerated time scale (typically <1 s) for the S350C and S322C. As the natural response time of the S425C-L is fast, the S425C-L does not benefit from acceleration and this function cannot be enabled. See the Operation tab for additional information.
    • 12 VDC power supply is included.
    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    S350C Support Documentation
    S350CThermal Power Sensor Head, Surface Absorber, 0.19 - 1.1 µm and 10.6 µm, 10 mW - 40 W, Ø40 mm
    		$1,365.13
    Today
    S425C-L Support Documentation
    S425C-LThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 2 mW - 50 W, Ø25.4 mm
    		$1,069.20
    Lead Time
    S322C Support Documentation
    S322CThermal Power Sensor Head, Surface Absorber, 0.25 - 11 µm, 100 mW - 200 W, Ø25 mm, Fan Cooled
    		$1,690.54
    Today

    Thermal Sensors for High Max Power Density Laser Pulses

    Table 622A  Specifications
    Item #a S370C S470C
    Sensor Image
    (Click the Image to Enlarge)    		 S370C S470C
    Wavelength Range 400 nm - 5.2 µm 250 nm - 10.6 µm
    Optical Power Range 10 mW - 10 W (15 Wb) 100 µW - 5 W (Pulsed and CW)
    Input Aperture Size Ø25 mm Ø15 mm
    Active Detector Area
    		 Ø25 mm Ø16 mm
    Max Optical Power Density 35 W/cm2 (Avg.); 100 GW/cm2 (Peak)
    Detector Type Thermal Volume Absorber (Thermopile)
    Linearity ±1% ±0.5%
    Resolutionc 250 µW 10 µW
    Measurement Uncertaintyd ±3% @ 1064 nm 
    ±5% @ 400 nm - 1064 nm    		 ±3% @ 1064 nm 
    ±5% @ 250 nm - 10.6 µm
    Response Timee 45 s
    (3 s from 0 to 90%)    		 6.5 s
    (<2 s from 0 to 90%)
    Cooling Convection (Passive)
    Housing Dimensions
    (Without Adapter, if Applicable)    		 75 mm x 75 mm x 51.2 mm
    (2.95" x 2.95" x 2.02")    		 45.0 mm x 45.0 mm x 18.0 mm
    (1.77" x 1.77" x 0.71")
    Temperature Sensor
    (In Sensor Head)    		 N/A N/A
    Cable Length 1.5 m
    Post Mounting M6 Threaded Taps, Includes
    Ø1/2" Post, 75 mm Long    		 Universal 8-32 / M4 Tap
    (Post Not Included)
    30 mm Cage Mounting Four 4-40 Tapped Holes -
    Aperture Threads - External SM1
    Accessories Externally SM1-Threaded Adapter -
    Compatible Consoles PM400, PM100D, PM100A, and PM5020
    Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM102, PM102A, PM102U, and PM100USB
    • For complete specifications, please see the Specs tab here.
    • Two Minute Maximum Exposure Time
    • Measurement taken with the PM100D console for the S370C and with the legacy PM200 for the S470C. In all cases, the acceleration circuit was switched off. Resolution performance will be similar with our other power meter consoles.
    • Defined as the measurement uncertainty during calibration at the specified wavelengths for a beam diameter > 1 mm. The ±3% specification was determined by laser calibration, and the ±5% specification was determined through spectral calibration, in which values were interpolated using the laser calibration data and the absorption curve for the absorber. Calibration can be performed at 10.6 µm upon request.
    • Typical natural response time (0 - 95%). Our power consoles can provide estimated measurements of optical power on an accelerated time scale (typically <2 s). See the Operation tab for additional information.
    • Designed for Optical Power Measurements of Nd:YAG Lasers
    • Ideal for Applications with High Peak Pulse Powers
    • S370C: Ø25 mm Aperture for Large-Spot-Size Beams
    • S470C: High-Sensitivity for High-Peak-Power Pulses with Low Average Power
    • See the Full Web Presentation for More Information

    The S370C and S470C Thermal Sensors are designed to measure short and highly energetic laser pulses. All of these units are post-mountable for free-space applications and feature NIST-traceable data stored in the sensor connector.

    These thermal power sensors are unique in that they have thermal volume absorbers, where our other thermal power sensors have thermal surface absorbers. The volume absorber consists of a Schott glass filter. Incident pulses are absorbed and the heat is distributed throughout the volume. In this way, pulses that would have damaged the absorption coating of a thermal surface absorber are safely measured by these thermal volume absorbers. 

    The S370C features a large Ø25 mm aperture ideal for large-spot-size beams, and it is compatible with average powers from 10 mW to 10 W (CW).

    In comparison, the S470C is faster, as the glass absorber volume is reduced and other design parameters have been optimized for speed. This results in a different optical power range, with the ability to measure powers down to 100 µW. The Ø15 mm aperture is of the S470C is smaller, and it has a lower max average power of 5 W. Its 10 µW resolution is better than the 250 µW resolution of the S370C.

    Thorlabs offers a recalibration service for these sensors, which can be ordered below (see Item # CAL-THPY).

    Thermal Sensor Absorption Pulsed Lasers
    Click to Enlarge
    Figure 622B  This absorption curve is shown over a broader wavelength range than the sensors' operating ranges. See Table 622A for the operating wavelength range of each sensor.
    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    S370C Support Documentation
    S370CThermal Power Sensor Head, Volume Absorber, 0.4 - 5.2 µm, 10 mW - 10 W, Ø25 mm
    		$1,417.25
    Lead Time
    S470C Support Documentation
    S470CThermal Power Sensor Head, Volume Absorber, 0.25 - 10.6 µm, 100 µW - 5 W, Ø15 mm
    		$1,442.68
    Today

    Thermal Position & Power Sensors

    Item #a S440C S442C
    Sensor Image
    (Click the Image to Enlarge)
    Wavelength Range 190 nm - 20 µm
    Optical Power Range 0.5 mW - 5 W 10 mW - 50 W
    Input Aperture Size 17 mm x 17 mm Ø17.5 mm
    Max Optical Power Density 1.5 kW/cm2
    Detector Type Four Thermopiles in Quadrant Configuration
    Linearity ±1%
    Resolutionb 50 µW 1 mW
    Measurement Uncertaintyc ±5% at 1064 nm;
    ±7% for 250 nm - 17 µm
    Position Resolution 5 µm 10 µm
    Position Accuracyd 50 µm (Ø1 mm Circle)
    200 µm (Ø6 mm Circle)    		 100 µm (Ø1 mm Circle)
    300 µm (Ø6 mm Circle)
    Position Repeatabilityd 15 µm (Ø1 mm Circle)
    100 µm (Ø6 mm Circle)    		 25 µm (Ø1 mm Circle)
    150 µm (Ø6 mm Circle)
    Response Timee <1.1 s <0.6 s
    Cooling Convection (Passive)
    Housing Dimensions
    (Without Adapter)    		 40.6 mm x 40.6 mm x 8.9 mm
    (1.60" x 1.60" x 0.35")    		 100.0 m x 100.0 mm x 57.8 mm
    (3.94" x 3.94" x 2.28")
    Temperature Sensor
    (In Sensor Head)    		 NTC Thermistor
    Cable Length 1.5 m
    Post Mounting One 8-32 / M4 Universal Tap Two 8-32 / M4 Universal Taps
    30 mm Cage Mounting Four Ø6 mm Through Holes -
    Aperture Threads - Internal SM1 (1.035"-40)
    Accessories - Externally SM1-Threaded Adapter
    Compatible Consoles PM400 and PM5020
    Compatible Interfaces PM102, PM102A, and PM102U
    • For complete specifications, please see the Specs tab here.
    • Measured Using the PM400 Console with Acceleration Circuit Switched Off
    • Beam Diameter > 1 mm
    • Valid within the Specified Area at the Center of the Sensor
    • Typical Natural Response Time (0 - 95%)
    • Segmented Quadrant Position-Sensing Detector
    • S440C: High Sensitivity; 30 mm Cage System Compatible
    • S442C: High Power; Heat Sink Included
    • See the Full Web Presentation for More Information

    The S440C and S442C position sensors use thermopiles to obtain high-resolution measurements of a beam's position and power. The detector area consists of four thermopile-based sensors arranged as quadrants of a square. The quadrants are mechanically coupled but electrically isolated; thus, heat is free to flow across the entire active area, but the signal from each quadrant measures the response in only that quadrant's thermopile. The XY position of the beam is determined by comparing the signal intensity measured for each quadrant.

    The S440C detector is optimized for high sensitivity from 0.5 mW to 5 W. The housing features four Ø6 mm through holes for compatibility with 30 mm cage systems, as well as an 8-32 / M4 universal tap for post mounting. The S442C detector is compatible with higher power levels from 10 mW up to 50 W. The housing includes a heat sink for superior heat dissipation, as well as two 8-32 / M4 universal taps for post mounting.

    Both detectors feature C-Series connectors which contain NIST- and PTB-traceable calibraion data. The sensors can be controlled using the PM400 or PM5020 power meter console or PM102 series power meter interfaces. The system can be configured to display a visual trace of the position over time, a graph of the X and Y positions over time, a table of measurement statistics, or a simple numerical readout of the incident power. See the full web presentation and the PM400 manual for details.

    For information on recalibration services for these products, please contact Tech Support.

    Low Power High Resolution Thermal Sensor Absorption
    Click to Enlarge
    Click Here for Raw Data
    Figure 690A  The wavelength range of the data in this graph is limited by the detector used during testing. The thermal position detectors are capable of operating at up to 20 µm.
    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    S440C Support Documentation
    S440CCustomer Inspired! Thermal Power Sensor Head, Position Sensing, 0.19 - 20 µm, 0.5 mW - 5 W, 17 mm x 17 mm
    		$1,503.51
    Today
    S442C Support Documentation
    S442CCustomer Inspired! Thermal Power Sensor Head, Position Sensing, 0.19 - 20 µm, 10 mW - 50 W, Ø17.5 mm
    		$1,327.31
    Today

    Standard Pyroelectric Energy Sensors

    Table 623A  Specifications
    Item #a ES111C ES120C ES145C
    Sensor Image
    (Click the Image to Enlarge)    		 ES111C ES120C ES145C
    Input Aperture Size Ø11 mm Ø20 mm Ø45 mm
    Wavelength Range 0.185 - 25 µm
    Energy Range 10 µJ - 150 mJ 100 µJ - 500 mJ 500 µJ - 2 J
    Max Repetition Rateb 40 Hz 30 Hz 30 Hz
    Max Power Density
    (Pulse Width)
    		 8 MW/cm2
    (10 ns Pulse)
    Max Pulse Energy Density
    (Pulse Width)    		 0.15 J/cm2
    (1 µs Pulse)
    Coating (Click for Plot) Black Broadband
    Resolution 100 nJ 1 µJ 1 µJ
    Linearity ±1%
    Measurement Uncertainty ±5% @ 190 nm - 25 µm ±5% @ 185 nm - 25 µm ±5% @ 185 nm - 25 µm
    Housing Dimensions Ø36 mm x 16 mm Ø50 mm x 18 mm Ø75 mm x 21 mm
    Active Detector Area 95.0 mm2 314.2 mm2 1590.4 mm2
    Cable Length 1.5 m (60")
    Post Mounting 8-32 Mounting Thread, 8-32 and M4 Insulating Adapters Included
    Cage Mounting N/A Four 4-40 Threaded Holes
    for 30 mm Cage Systems    		 N/A
    Compatible Consoles PM400, PM100D, and PM5020
    Compatible Interfaces PM103, PM103A, PM103E, PM103U, and PM100USB
    • For complete specifications, please see the Specs tab here.
    • @ 1 MΩ Load Resistor
    • For General Purpose Optical Pulse Measurements
    • Black Broadband Coating with Flat Response Over a Wide Wavelength Range
    • Ø11 mm, Ø20 mm, or Ø45 mm Sensor Area
    • BNC Connector for Oscilloscope Use
    • Each Sensor Includes:
      • C-Series Connector Adapter for Use with Compatible Thorlabs' Consoles (See Table 623A or the Console Selection Tab)
      • Two Electrically Isolating Post Adapters (One Imperial and One Metric)
    • See the Full Web Presentation for More Information

    The ES1xxC Standard Pyroelectric Sensors are designed to measure pulsed coherent and incoherent sources. Pyroelectric sensors are not suited for CW measurements, as they convert energy from light pulses into voltage pulses. The black broadband coating on these sensors is ideal for low power, wavelength-independent energy measurements due to its flat absorption profile (see Table 623A). Large sensor areas of Ø11 mm, Ø20 mm, or Ø45 mm aid with easy alignment. The sensors can be connected directly to an oscilloscope with a 1 MΩ input resistance via the BNC connector. To accommodate higher repetition rates when connected to an oscilloscope, the load resistance can be reduced. Each energy sensor includes a BNC to C-Series adapter that contains NIST- and PTB-traceable calibration data.

    Thorlabs offers a recalibration service for these energy sensors, which can be ordered below (see Item # CAL-THPY).

    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    ES111C Support Documentation
    ES111CPyroelectric Energy Sensor, Black Coating, 0.185 - 25 µm, 150 mJ, Ø11 mm, 40 Hz
    		$1,611.71
    Today
    ES120C Support Documentation
    ES120CPyroelectric Energy Sensor, Black Coating, 0.185 - 25 µm, 500 mJ, Ø20 mm, 30 Hz
    		$1,677.82
    Today
    ES145C Support Documentation
    ES145CPyroelectric Energy Sensor, Black Coating, 0.185 - 25 µm, 2 J, Ø45 mm, 30 Hz
    		$1,937.12
    Today

    High-Energy Pyroelectric Energy Sensors

    ES220C with a 30 mm Cage System
    Click to Enlarge
    Figure 744A  ES220C Sensor Mounted in a 30 mm Cage System
    • For High-Energy Optical Pulse Measurements Up to 15 J
    • Ceramic Coating with High Damage Threshold for High-Energy-Density (Up to 0.45 J/cm2) Lasers
    • Ø20 mm or Ø45 mm Sensor Area
    • BNC Connector for Oscilloscope Use
    • Each Sensor Includes:
      • C-Series Connector Adapter for Use with Compatible Thorlabs' Consoles (See Table 744B or the Console Selection Tab)
      • Two Electrically Isolating Post Adapters (One Imperial and One Metric)
    • See the Full Web Presentation for More Information

    The ES2xxC High-Energy Pyroelectric Sensors are designed to measure pulsed coherent and incoherent sources. Pyroelectric sensors are not suited for CW measurements, as they convert energy from light pulses into voltage pulses. A ceramic coating is used for high energy measurements as high as 3 J for the ES220C sensor or 15 J for the ES245C sensor. Large Ø20 mm or Ø45 mm sensor areas aid with easy alignment. The sensors can be connected directly to an oscilloscope with a 1 MΩ input resistance via the BNC connector. To accommodate higher repetition rates when connected to an oscilloscope, the load resistance can be reduced. Each energy sensor also includes a BNC to C-Series adapter that contains NIST- and PTB-traceable calibration data.

    Thorlabs offers a recalibration service for these energy sensors, which can be ordered below (see Item # CAL-THPY).

    Table 744B  Specifications
    Item #a ES220C ES245C
    Sensor Image
    (Click the Image to Enlarge)    		 ES220C ES245C
    Input Aperture Size Ø20 mm Ø45 mm
    Wavelength Range 0.185 - 25 µm
    Energy Range 500 µJ - 3 J 1 mJ - 15 J
    Max Repetition Rateb 30 Hz 30 Hz
    Max Power Density
    (Pulse Width)
    		 65 MW/cm2
    (7 ns Pulse @ 355 nm)
    Max Pulse Energy Density
    (Pulse Width)    		 0.45 J/cm2
    (7 ns Pulse @ 355 nm)
    Coating (Click for Plot) Ceramic
    Resolution 25 µJ 50 µJ
    Linearity ±1%
    Measurement Uncertainty ±5% @ 0.185 - 25 µm
    Housing Dimensions Ø50 mm x 18 mm Ø75 mm x 21 mm
    Active Detector Area 314.2 mm2 1590.4 mm2
    Cable Length 1.5 m (60")
    Post Mounting 8-32 Mounting Thread, 8-32 and M4 Insulating Adapters Included
    Cage Mounting Four 4-40 Threaded Holes for 30 mm Cage Systems N/A
    Compatible Consoles PM400, PM100D, and PM5020
    Compatible Interfaces PM103, PM103A, PM103E, PM103U, and PM100USB
    • For complete specifications, please see the Specs tab here.
    • @ 1 MΩ Load Resistor
    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    ES220C Support Documentation
    ES220CPyroelectric Energy Sensor, Ceramic Coating, 0.185 - 25 µm, 3 J, Ø20 mm, 30 Hz
    		$2,014.66
    Today
    ES245C Support Documentation
    ES245CPyroelectric Energy Sensor, Ceramic Coating, 0.185 - 25 µm, 15 J, Ø45 mm, 30 Hz
    		$2,340.04
    Lead Time

    Fast Pyroelectric Energy Sensors

    Table 742A  Specifications
    Item #a ES308C ES312C ES412C
    Sensor Image
    (Click the Image to Enlarge)    		 ES308C ES312C ES412C
    Input Aperture Size Ø8 mm Ø12 mm Ø12 mm
    Wavelength Range 0.185 - 25 µm 0.185 - 25 µm 0.185 - 2.5 µm
    Energy Range 500 µJ - 1 J 100 µJ - 1 J 50 µJ - 500 mJ
    Max. Repetition Rateb 1 kHz 250 Hz 2 kHz
    Max Power Density
    (Pulse Width)    		 8 MW/cm2
    (10 ns Pulse)    		 5 MW/cm2
    (10 ns Pulse)
    Max Pulse Energy Density
    (Pulse Width)    		 80 mJ/cm2
    (10 ns Pulse)    		 50 mJ/cm2
    (10 ns Pulse)
    Coating
    (Click for Plot)    		 Black Broadband Metal
    Resolution 5 µJ 1 µJ 1 µJ
    Linearity ±1%
    Measurement Uncertainty ±5% @ 0.185 - 25 µm ±5% @ 0.185 - 2.5 µm
    Housing Dimensionsc Ø38 mm x 15 mm Ø38 mm x 15 mm Ø38 mm x 15 mm
    Active Detector Area 50.3 mm2 113.1 mm2 113.1 mm2
    Cable Length 1.5 m (60")
    Post Mounting 8-32 and M4 Combi Mounting Thread
    Aperture Thread External SM1 (1.035"-40) Thread
    Thread Depth: 3.0 mm (0.12")
    Compatible Consoles PM400, PM100D, and PM5020
    Compatible Interfaces PM103, PM103A, PM103E, PM103U, and PM100USB
    • For complete specifications, please see the Specs tab here.
    • @ 1 MΩ Load Resistor
    • Including SM1 Thread Depth
    • For Measurements of Repetition Rates up to 10 kHz
    • Two Coating Options:
      • Black Broadband Coating with Flat Response from 185 nm to 25 µm
      • Metal Coating for 185 nm to 2.5 µm to Support Detecting Repetition Rates up to 2 kHz*
    • Ø8 mm or Ø12 mm Sensor Areas
    • BNC Connector for Oscilloscope Use
    • Includes C-Series Connector Adapter for Use with Compatible Thorlabs' Consoles (See Table 742A or the Console Selection Tab)
    • See the Full Web Presentation for More Information

    The ES3xxC and ES412C Fast Pyroelectric Sensors are designed to measure pulsed coherent and incoherent sources with high repetition rates up to 2 kHz. Pyroelectric sensors are not suited for CW measurements, as they convert energy from light pulses into voltage pulses. The ES3xxC sensors have a black broadband that provides a flat response from 185 nm to 25 µm, and, depending on the sensor size, can support measurements of repetition rates up to 1 kHz. The metal-coated ES412C sensor can detect repetition rates up to 2 kHz over a more limited wavelength range of 185 nm to 2.5 µm. Ø8 mm or Ø12 mm sensor areas are available, and each input aperture has external SM1 (1.035"-40) threads for compatibility with our SM1-threaded lens tubes. These energy sensors have BNC connectors for connection to an oscilloscope with a 1 MΩ load input resistance; using these sensors with a different load resistance may lead to reduced speed. A BNC to C-Series adapter containing NIST- and PTB-traceable calibration data is also included with each sensor.

    Thorlabs offers a recalibration service for these energy sensors, which can be ordered below (see Item # CAL-THPY).

    *To detect repetition rates up to 10 kHz, Thorlabs also offers the ES408C Pyroelectric Sensor, which can be controlled using the PM103 Series Power and Energy Meter Interfaces; as the PM400 console, PM100D console, and PM100USB interface can only support sensors with repetition rates up to 3 kHz, they should not be used with the ES408C sensor.

    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    ES308C Support Documentation
    ES308CPyroelectric Energy Sensor, Black Coating, 0.185 - 25 µm, 1 J, Ø8 mm, 1 kHz
    		$1,489.76
    Lead Time
    ES312C Support Documentation
    ES312CPyroelectric Energy Sensor, Black Coating, 0.185 - 25 µm, 1 J, Ø12 mm, 250 Hz
    		$1,547.06
    Today
    ES412C Support Documentation
    ES412CPyroelectric Energy Sensor, Metal Coating, 0.185 - 2.5 µm, 500 mJ, Ø12 mm, 2 kHz
    		$1,604.36
    Today

    Manufacturer Recalibration Service for Photodiode Power Sensors

    Table 236A  Compatibility
    Calibration Service Item # Compatible Sensors
    CAL-UVPD S120VC
    CAL-PD S116C, S120C, S121C, S170C, S140C, S142C, S142CL, S150C, S151C, PM16-120, PM16-121, PM16-140
    CAL-UVPD2 S130VC
    CAL-PD2 S130C, PM16-130, PM160
    CAL-NS NS170C
    CAL-IRPD S122C, S144C, S145C, S145CL, S146C, S154C, S155C, PM16-122, PM16-144
    CAL-IRPD2 S132C
    CAL-MIRPD S148C, S180C

    Thorlabs offers traceable recalibration services for our photodiode optical power sensors. To ensure accurate measurements, we recommend recalibrating the sensors annually. The manufacturer calibration of a power sensor includes recalibration of a single-channel console or interface at no additional cost; this is unavailable for the accredited calibration option. If you wish to calibrate one or more sensors with a dual-channel console, each sensor and console calibration service will need to be purchased individually. For more details on these recalibration services, please click the Documents () icons below.

    Refer to Table 236A for the appropriate calibration service Item # that corresponds to your power sensor.

    Requesting a Calibration
    Thorlabs provides two options for requesting a calibration:

    1. Complete the Returns Material Authorization (RMA) form. When completing the RMA form, please enter your name, contact information, the Part #, and the Serial # of each item being returned for calibration; in the Reason for Return field, select "I would like an item to be calibrated." In the Further Details field, please indicate "Manufacturer Calibration" or the desired calibration part number below in order to differentiate from the ISO17025 accredited calibration option. Once the form has been submitted, a member of our RMA team will reach out to provide an RMA Number, return instructions, and to verify billing and payment information.
    2. Select the appropriate sensor calibration Item # below, enter the Part # and Serial # of the sensor that requires recalibration, and then Add to Cart. If you would like a console calibrated with your sensor, repeat this process for Item # CAL-PM1 or CAL-PM2 below, entering the console Item # and Serial #. A member of our RMA team will reach out to coordinate the return of the item(s) for calibration. Note that each console calibration Item # represents the cost of calibrating a console alone; if requesting a single-channel console calibration with a sensor calibration, the appropriate discount will be applied when your request is processed. Should you have other items in your cart, note that the calibration request will be split off from your order for RMA processing.

    Please Note: To ensure your item being returned for calibration is routed appropriately once it arrives at our facility, please do not ship it prior to being provided an RMA Number and return instructions by a member of our team.

    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    CAL-UVPD Support Documentation
    CAL-UVPDManufacturer Recalibration Service for S120VC UV-Extended Silicon Photodiode Power Sensor
    Part Number:  Serial Number:
    		$206.73
    Lead Time
    CAL-PD Support Documentation
    CAL-PDManufacturer Recalibration Service for Single-Power-Range Silicon Photodiode Power Sensors
    Part Number:  Serial Number:
    		$179.20
    Lead Time
    CAL-UVPD2 Support Documentation
    CAL-UVPD2Manufacturer Recalibration Service for S130VC Extended-UV Silicon Photodiode Power Sensor
    Part Number:  Serial Number:
    		$245.50
    Lead Time
    CAL-PD2 Support Documentation
    CAL-PD2Manufacturer Recalibration Service for Dual-Power-Range Silicon Photodiode Power Sensors
    Part Number:  Serial Number:
    		$208.47
    Lead Time
    CAL-NS Support Documentation
    CAL-NSManufacturer Recalibration Service for Second-Order Nonlinear Crystal with Silicon Photodiode Sensor
    Part Number:  Serial Number:
    		$358.45
    Lead Time
    CAL-IRPD Support Documentation
    CAL-IRPDManufacturer Recalibration Service for Single-Power-Range Germanium or InGaAs Photodiode Power Sensors
    Part Number:  Serial Number:
    		$202.10
    Lead Time
    CAL-IRPD2 Support Documentation
    CAL-IRPD2Manufacturer Recalibration Service for Dual-Power-Range Germanium or InGaAs Photodiode Power Sensors
    Part Number:  Serial Number:
    		$221.16
    Lead Time
    CAL-MIRPD Support Documentation
    CAL-MIRPDManufacturer Recalibration Service for Extended InGaAs or MCT Photodiode Power Sensors
    Part Number:  Serial Number:
    		$360.99
    Lead Time

    In-House ISO17025 Accredited Recalibration Service for Photodiode Power Sensors

    Table 791A  Compatibility
    Calibration Service Item # Compatible Sensors
    CAL-UVPDD S120VC
    CAL-PDD S116C, S120C, S121C, S170C, S140C, S142C, S142CL, S150C, S151C, PM16-120, PM16-121, PM16-140
    CAL-UVPD2D S130VC
    CAL-PD2D S130C, PM16-130, PM160
    CAL-IRPDD S122C, S144C, S145C, S145CL, S146C, S154C, S155C, PM16-122, PM16-144
    CAL-IRPD2D S132C
    CAL-MIRPDD S148C

    Thorlabs offers ISO17025 accredited recalibration services for our photodiode optical power sensors. If you wish to calibrate one or more sensors with a console, each sensor and console calibration service will need to be purchased individually. ISO17025 accredited calibrations are performed in accordance with DIN EN ISO/IEC 17025:2018. Thorlabs GmbH's calibration laboratory is accredited by the German Accreditation Body (DAkkS), the national accreditation authority of the Federal Republic of Germany. The scope of services is described here in English or German. For more details on these recalibration services, please see the Recalibration tab or click the Documents () icons below.

    Refer to Table 791A for the appropriate calibration service Item # that corresponds to your power sensor.

    Requesting a Calibration
    Thorlabs provides two options for requesting a calibration:

    1. Complete the Returns Material Authorization (RMA) form. When completing the RMA form, please enter your name, contact information, the Part #, and the Serial # of each item being returned for calibration; in the Reason for Return field, select "I would like an item to be calibrated." In the Further Details field, please indicate "ISO17025 Accredited Calibration" or the desired calibration part number below in order to differentiate from the manufacturer calibration option. Once the form has been submitted, a member of our RMA team will reach out to provide an RMA Number, return instructions, and to verify billing and payment information.
    2. Select the appropriate sensor calibration Item # below, enter the Part # and Serial # of the sensor that requires recalibration, and then Add to Cart. If you would like a console calibrated with your sensor, repeat this process for Item # CAL-PM1, CAL-PM1D, CAL-PM2, or CAL-PM2D below, entering the console Item # and Serial #. A member of our RMA team will reach out to coordinate the return of the item(s) for calibration. Note that each console calibration Item # represents the cost of calibrating a console alone; if requesting a single-channel console calibration with a sensor calibration, the appropriate discount will be applied when your request is processed. Should you have other items in your cart, note that the calibration request will be split off from your order for RMA processing.

    Please Note: To ensure your item being returned for calibration is routed appropriately once it arrives at our facility, please do not ship it prior to being provided an RMA Number and return instructions by a member of our team.

    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    CAL-UVPDD Support Documentation
    CAL-UVPDDNEW!ISO17025 Accredited Calibration Service for S120VC UV-Extended Silicon Photodiode Power Sensor
    Part Number:  Serial Number:
    		$597.98
    Lead Time
    CAL-PDD Support Documentation
    CAL-PDDNEW!ISO17025 Accredited Calibration Service for Single-Power-Range Silicon Photodiode Power Sensors
    Part Number:  Serial Number:
    		$518.35
    Lead Time
    CAL-UVPD2D Support Documentation
    CAL-UVPD2DNEW!ISO17025 Accredited Calibration Service for S130VC Extended-UV Silicon Photodiode Power Sensor
    Part Number:  Serial Number:
    		$710.10
    Lead Time
    CAL-PD2D Support Documentation
    CAL-PD2DNEW!ISO17025 Accredited Calibration Service for Dual-Power-Range Silicon Photodiode Power Sensors
    Part Number:  Serial Number:
    		$531.30
    Lead Time
    CAL-IRPDD Support Documentation
    CAL-IRPDDNEW!ISO17025 Accredited Calibration Service for Single-Power-Range Germanium or InGaAs Photodiode Power Sensors
    Part Number:  Serial Number:
    		$584.57
    Lead Time
    CAL-IRPD2D Support Documentation
    CAL-IRPD2DNEW!ISO17025 Accredited Calibration Service for Dual-Power-Range Germanium or InGaAs Photodiode Power Sensors
    Part Number:  Serial Number:
    		$639.69
    Lead Time
    CAL-MIRPDD Support Documentation
    CAL-MIRPDDNEW!ISO17025 Accredited Calibration Service for Extended InGaAs Photodiode Power Sensors
    Part Number:  Serial Number:
    		$921.23
    Lead Time

    Manufacturer Recalibration Service for Thermal Power and Pyroelectric Energy Sensors

    Table 317A Compatibility
    Sensor Type Sensor Item #s
    Thermal Power S175C, S302Ca, S305Ca, S310Ca, S314Ca,S322C, S350C, S370C, S401C, S405C, S415C, S425C, S425C-L, S470C, PM160T, PM160T-HP, PM16-401, PM16-405
    Pyroelectric Energy ES111C, ES120C, ES145C, ES220C, ES245C, ES308C, ES312C, ES408C, ES412C
    • This former catalog item is now offered as a special.

    Thorlabs offers recalibration services for our Thermal Power and Pyroelectric Energy Sensors. To ensure accurate measurements, we recommend recalibrating the sensors annually. Recalibration of a single-channel power and/or energy meter console or interface is included with the recalibration of a sensor at no additional cost. If you wish to calibrate one or more sensors with a dual-channel console, each sensor and console calibration service will need to be purchased individually.

    Please note that the CAL-THPY recalibration service cannot be used for our Thermal Position & Power Sensors; recalibration for these sensors can be requested by contacting Tech Support. Table 317A lists the sensors for which the CAL-THPY recalibration service is available.

    Requesting a Calibration
    Thorlabs provides two options for requesting a calibration:

    1. Complete the Returns Material Authorization (RMA) form. When completing the RMA form, please enter your name, contact information, the Part #s, and the Serial #s of all sensors or consoles being returned for calibration; in the Reason for Return field, select "I would like an item to be calibrated." All other fields are optional. Once the form has been submitted, a member of our RMA team will reach out to provide an RMA Number, return instructions, and to verify billing and payment information.
    2. Enter the Part # and Serial # of the item that requires recalibration below and then Add to Cart. If you would like a console calibrated with your sensor, repeat this process for Item # CAL-PM1 or CAL-PM2 below, entering the console Item # and Serial #. A member of our RMA team will reach out to coordinate the return of the item(s) for calibration. Note that each console calibration Item # represents the cost of calibrating a console alone; if requesting a single-channel console calibration with a sensor calibration, the appropriate discount will be applied when your request is processed. Should you have other items in your cart, note that the calibration request will be split off from your order for RMA processing.

    Please Note: To ensure your item being returned for calibration is routed appropriately once it arrives at our facility, please do not ship it prior to being provided an RMA Number and return instructions by a member of our team. Pyroelectric energy sensors returned for recalibration or servicing must include the separate BNC to DB9 adapter, which contains the sensor EEPROM.

    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    CAL-THPY Support Documentation
    CAL-THPYRecalibration Service for Thermal Power and Pyroelectric Energy Sensors at 1064 nm
    Part Number:  Serial Number:
    		$227.50
    Lead Time

    Manufacturer Recalibration of Power & Energy Meter Electronics

    Table 719A  Compatibility
    Calibration Service Item # Compatible Consoles & Interfaces
    Single-Channel
    CAL-PM1 PM100D, PM100A, PM400, PM100USB,
    PM101 Series, PM102 Series, PM103 Series
    Dual-Channel
    CAL-PM2 PM5020, Previous-Generation PM320E

    These traceable recalibration services are for the power and/or energy meter electronics of our consoles and interfaces. To ensure accurate measurements, we recommend recalibrating annually. The manufacturer calibration of a power sensor includes recalibration of a single-channel console or interface at no additional cost; this is unavailable for the accredited calibration option. If you wish to calibrate one or more sensors with a dual-channel console, each sensor and console calibration service will need to be purchased individually. For more details on these recalibration services, please click the Documents () icons below. 

    Table 719A lists the power and/or energy meter consoles and interfaces that can be calibrated using the CAL-PM1 and CAL-PM2 recalibration services.

    Requesting a Calibration
    Thorlabs provides two options for requesting a calibration:

    1. Complete the Returns Material Authorization (RMA) form. When completing the RMA form, please enter your name, contact information, the Part #, and the Serial # of each item being returned for calibration; in the Reason for Return field, select "I would like an item to be calibrated." In the Further Details field, please indicate "Manufacturer Calibration" or the desired calibration part number below in order to differentiate from the ISO17025 accredited calibration option. Once the form has been submitted, a member of our RMA team will reach out to provide an RMA Number, return instructions, and to verify billing and payment information.
    2. Select the appropriate Item # below, enter the Part # and Serial # of the item that requires recalibration, and then Add to Cart. If you would like to calibrate one or more sensors with your console, repeat this process for the appropriate sensor recalibration service above, entering the console Item # and Serial #. A member of our RMA team will reach out to coordinate return of the item(s) for calibration. Note that each console calibration Item # represents the cost of calibrating a console alone; if requesting a single-channel console calibration with a sensor calibration, the appropriate discount will be applied when your request is processed. Should you have other items in your cart, note that the calibration request will be split off from your order for RMA processing.

    Please Note: To ensure your item being returned for calibration is routed appropriately once it arrives at our facility, please do not ship it prior to being provided an RMA Number and return instructions by a member of our team.

    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    CAL-PM1 Support Documentation
    CAL-PM1Manufacturer Recalibration of Single-Channel Power and/or Energy Meter Electronics
    Part Number:  Serial Number:
    		$84.32
    Lead Time
    CAL-PM2 Support Documentation
    CAL-PM2Manufacturer Recalibration of Dual-Channel Power and Energy Meter Electronics
    Part Number:  Serial Number:
    		$224.83
    Lead Time

    In-House ISO17025 Accredited Recalibration of Power & Energy Meter Electronics

    Table 792A  Compatibility
    Calibration Service Item # Compatible Consoles & Interfaces
    Single-Channel
    CAL-PM1D PM100D, PM100A, PM400, PM100USB,
    PM101 Series, PM102 Series, PM103 Series
    Dual-Channel
    CAL-PM2D PM5020

    These ISO17025 accredited recalibration services are for the power and/or energy meter electronics of our consoles and interfaces. If you wish to calibrate one or more sensors with a console, each sensor and console calibration service will need to be purchased individually. ISO17025 accredited calibrations are performed in accordance with DIN EN ISO/IEC 17025:2018. Thorlabs GmbH's calibration laboratory is accredited by the German Accreditation Body (DAkkS), the national accreditation authority of the Federal Republic of Germany. The scope of services is described here in English or German. For more details on these recalibration services, please see the Recalibration tab or click the Documents () icons below.

    Table 792A lists the power and/or energy meter consoles and interfaces that can be calibrated using the CAL-PM1D and CAL-PM2D recalibration services.

    Requesting a Calibration
    Thorlabs provides two options for requesting a calibration:

    1. Complete the Returns Material Authorization (RMA) form. When completing the RMA form, please enter your name, contact information, the Part #, and the Serial # of each item being returned for calibration; in the Reason for Return field, select "I would like an item to be calibrated." In the Further Details field, please indicate "ISO17025 Accredited Calibration" or the desired calibration part number below in order to differentiate from the manufacturer calibration option. Once the form has been submitted, a member of our RMA team will reach out to provide an RMA Number, return instructions, and to verify billing and payment information.
    2. Select the appropriate Item # below, enter the Part # and Serial # of the item that requires recalibration, and then Add to Cart. If you would like to calibrate one or more sensors with your console, repeat this process for the appropriate sensor recalibration service above, entering the console Item # and Serial #. A member of our RMA team will reach out to coordinate return of the item(s) for calibration. Note that each console calibration Item # represents the cost of calibrating a console alone; if requesting a single-channel console calibration with a sensor calibration, the appropriate discount will be applied when your request is processed. Should you have other items in your cart, note that the calibration request will be split off from your order for RMA processing.

    Please Note: To ensure your item being returned for calibration is routed appropriately once it arrives at our facility, please do not ship it prior to being provided an RMA Number and return instructions by a member of our team.

    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Universal Price Available
    CAL-PM1D Support Documentation
    CAL-PM1DNEW!ISO17025 Accredited Calibration for Single-Channel Power and/or Energy Meter Electronics
    Part Number:  Serial Number:
    		$244.22
    Lead Time
    CAL-PM2D Support Documentation
    CAL-PM2DNEW!ISO17025 Accredited Calibration for Dual-Channel Power and/or Energy Meter Electronics
    Part Number:  Serial Number:
    		$545.51
    Lead Time
    Additional Optical Power and Energy Meters
  • Photodiode Power Sensors

  • Thermal Power Sensors

  • Thermal Position & Power Sensors

  • Pyroelectric Energy Sensors

  • Digital Handheld Power & Energy Meter Console

  • Multi-Touch Power & Energy Meter Console

  • Analog Handheld Power Meter Console

  • Dual-Channel Benchtop Power & Energy Meter Console

  • Power and Energy Meters, USB Interface

  • Power Meter Bundles

  • Wireless Power Meter with Sensor

  • Compact USB Power Meters

  • Field Power Meter for Terminated Fibers

  • Power Meter Tutorial