Dual-Channel Benchtop Optical Power and Energy Meter Console


  • Fast Data Acquisition and Visualization Up to 100 kS/s
  • Configurable Analog Outputs with Smart Signal Correction
  • USB, Ethernet, and RS232 Remote Control as Well as Web Browser Monitoring
  • All Functions Accessible by Both Touchscreen and Physical Controls

PM5020

Benchtop Optical Power and Energy Meter Console

Interactive GUI Available for Download to Demo All Features of the PM5020 Console

Related Items


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Item #a PM5020
Compatible Sensors Photodiode Power, Thermal Power, Thermal Position and Power, and Pyroelectric Energy
Number of Channels 2
Optical Power Rangeb 100 pW to 200 W
Optical Energy Rangeb 10 µJ to 15 J
Available Sensor Wavelength Rangeb 185 nm - 25 μm
Display Refresh Rate 25 Hz
Bandwidtha DC - 250 kHz
Photodiode Sensor Measurement Rangeb,c 2 nA - 10 mA
Thermopile Sensor Measurement Rangeb,c 2 mV - 1 V
Pyroelectric Sensor Measurement Rangeb,c 20 mV - 100 V
  • See the Specs tab for complete specifications.
  • Sensor Dependent
  • Ranges Selectable in Watts (Photodiode and Thermopile) or Joules (Pyroelectric)

Features

  • Large 5" Graphical Touchscreen Display with WVGA Resolution
  • Built-In GUI Features:
    • CW and Modulated Light Measurements
    • Fast On-Board and Remote Data Acquisition Up to 100 kS/s
    • Apply User-Provided Spectral Calibration and Attenuation Correction to Measurements
    • Built-In Calculator can Perform Cross-Channel Math Functions
  • Interactive GUI Available for Download to Demo All Front Panel Features (See Interactive Demo tab)
  • Device Inputs/Outputs:
    • Configurable Analog Outputs
    • Optical Shutter Control
    • Connect Up to Two External Temperature Probes and Two Fans
    • Digital I/O Interface Including User-Accessible I2C Bus
    • Remote Operation and Network Capabilities Via USB, Ethernet, or RS232
  • View Console Measurements via Web Browser on PCs within the Same Network
  • Compatible with All Thorlabs' C-Series Sensors
  • Optical Power Monitor PC Software Available (See Software Tab for Details)

Thorlabs’ PM5020 Dual-Channel Power and Energy Meter Console is ideal for precise optical measurements, laser and photodiode characterization, lifecycle measurements, and many more applications in the lab and on the manufacturing floor. The high-resolution 5" touchscreen can be configured for various single- and dual-channel measurement, visualization, and data acquisition views (see the Display tab for more details). Aside from the touchscreen, the console has five dynamic side menu buttons, a channel button to quickly switch the display between sensor 1 and sensor 2, as well as a rotary navigation knob. An interactive GUI is avilable for download to demo all the front panel features (see the Interactive Demo tab). The screen and buttons are also backlit and can be dimmed for operation in dark environments. The fast boot time of approximately 3 seconds, including the calibration data read out from the connected sensors, means that the device is ready to go at any time.

Users can 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 or energy measurement. Measured data, calibration information, screenshots, and attenuation curves can all be saved to the unit's internal 8 GB memory. The user can export the saved data to the connected PC via USB or using the Ethernet connection and the web interface (see the Display tab).

Sensor Compatibility
The PM5020 console is compatible with more than 35 photodiode power, thermal power, thermal position and power, and pyroelectric energy sensors designed for use from the UV to the Mid-IR. See the Sensor Selection tab for further information. The console also allows the connection of unamplified anode or cathode grounded photodiodes with up to 10 mA photocurrent, thermal elements with up to 1 V output voltage, and pyroelectric detectors with up to 100 V output voltage. Special modes for photodiode sensors can be used to measure the peak power of modulated signals or pulses down to a 10 μs pulse width with a sampling rate up to 100 kS/s. Pulse energy measurements with pyroelectric sensors are supported up to a repetition rate of 80 kHz.

The PM5020 power and energy meter console is sold as a single benchtop device with the sensors available separately. The compatible sensors are offered below. To view the full range of Thorlabs' power and energy meter consoles, please refer to the Console Selection tab.

Connectivity
For each channel, the PM5020 power meter has a configurable, wavelength- and offset-corrected analog output (AN1 and AN2). For thermal power and position sensors, the X1, X2, Y1, and Y2 digital-to-analog converter-controlled outputs each provide a voltage that corresponds to the beam position in X (X1, X2) or Y (Y1, Y2). For power or energy sensors, the X1 and X2 outputs for each channel can export a voltage proportional to the power or energy level; the Y1 and Y2 outputs provide a voltage resulting from a calculation performed on the signal using a mathematical formula in the settings menu. The Y1 and Y2 outputs can also be configured to provide an analog signal from up to two connected negative temperature coefficient (NTC) thermistors.

Thorlabs' SH05R(/M) or SH1(/M) optical shutters can be directly connected to the console using the Hirose cable included with the shutters. The shutters can be controlled and monitored either manually via the user interface or through a TTL signal.

Two external NTC thermistors such as the Thorlabs TSP-TH can be connected to the 2.5 mm stereo audio or the 10-pin PCB connector in the back panel. Their readings can be displayed or logged.

Two fans up to 12 V can be connected to a 10-pin PCB connector in the back panel. The fan speed can be controlled by three settings: the operating voltage, the revolutions per minute (rpm) if tachometer feedback from the fan is provided, or the temperature when coupled with an NTC input. This connector can be used as a power supply for fan-controlled power sensors such as the S322C thermal sensor.

The user-accessible 10-pin PCB digital port provides 5 V tolerant LVTTL/TTL logic. Four general input/output (I/O) pins can also be configured for additional functions such as pass/fail testing or shutter control and monitoring. A separate trigger input and output pin can support synchronized measurements. An I2C bus pin supports additional humidity and temperature sensors (see the manual for details). See the Front & Back Panel tab for details.

Remote Console Control
Three different interfaces are provided for remotely controlling the PM5020 console: high-speed USB interface, Ethernet, and RS232. All three interfaces allow the console to be fully controlled through Thorlabs' Optical Power Meter (OPM) Software. The PM5020 console can be integrated into custom made systems with the help of the provided SCPI commands and drivers. See the Software tab for details. Additionally, the Ethernet connection allows the console measurements to be viewed within a web browser on any PC within the same network (see the Web Browser View in the Display tab).

Sensor Upgrade Service
Thorlabs' PM5020 Console is not compatible with previous-generation A- and B-series sensor heads. We offer a sensor upgrade service to make your existing sensors compatible 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 PM5020 console. Please contact our Tech Support team for details.

Recalibration Service
Thorlabs offers recalibration services for the PM5020 console electronics (which can be ordered below using Item # CAL-PM2), our photodiode and thermal power sensors, and our pyroelectric energy sensors. 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 or 2) separately add Item # CAL-PM2 and each sensor recalibration service Item # offered below to your cart.

Specificationsa
Display
Type Graphical IPS LCD with Touch, 854 x 480 Pixels
Format Numerical, Bargraph, Needle, Graph Power/Position/Temperature, Statistics
Size 5.0" (4.32" x 2.43", 109.7 mm x 61.6 mm)
Update Rate 25 Hz
Sensor Interface
Compatible Sensors Thorlabs' C-Series Photodiode, Thermal Power,
Thermal Position & Power, and Pyroelectric Sensors
Photodiodes up to 10 mA
Thermopiles up to 1 V
Pyroelectric Sensors up to 100 V
See Table Below for Additional Details
Channels 2
Input Connectors Two DE-9 Female, Back Panel (Compatible with C-Series Connectors)
External Trigger
Connector BNC, Front Panel (TTL 5 V Max)
10-Pin PCB, Back Panel (TTL 5 V Max)
Analog Outputs
Connector Two BNC, Back Panel
Signal CH1, CH2 Amplified, Corrected Input Signal
Voltage Range -2.5 V to 10 V
Bandwidth Up to 250 kHz, Dependent on Sensor and Settings
Programmable Analog Output
Connector Four BNC, Back Panel
Signal Selectable: CH1; CH2; CH1-CH2; CH1/CH2; Position X, Y
Voltage Range -5 to 10 V; Programmable Gain and Offset
Bandwidth Up to 1 kHz, Dependent on Sensor and Settings
Shutter Control
Type Support for SH05R(/M) or SH1(/M) Optical Shutter with Interlock Input
Connector Hirose HR10-7R-6S, 2.5 mm Mono Audio
Power Rating 15 V, 0.5 A
Temperature Control
Type NTC
Connector 2 Channels: 2.5 mm Stereo Audio and 10-Pin PCB (Back Panel)
Digital I/O
Type 4 Configurable I/O Channels, 1 Trigger In/Output, I2C (LVTTL / TTL)
Connector 10-Pin PCB, Back Panel
Fan Control
Type 2 Channels, Voltage or rpm Control (12 V, 0.25 A)
Connector 10-Pin PCB, Back Panel
Power Rating 12 V, 0.25 A
Interface
Type 1 USB 2.0
Connector USB B, Back Panel
Type 2 Ethernet
Connector RJ45, Back Panel
Type 3 Serial RS232
Connector DE-9 Female, Back Panel
Power Supply
Line Voltage 100 to 240 V
Line Frequency 50 to 60 Hz
Maximum Power Consumption 30 W
Mains Supply Overvoltage Category II (Cat II)
General
Dimensions (W x H x D) 253.2 mm x 110.6 mm x 293.6 mm
(9.97" x 4.35" x 11.56")
Weightb 2.6 kg
Mounting Options Benchtop
Operating Temperature Rangec 0 to 40 °C
Storage Temperature Range -40 to 70 °C
Relative Humidity Max 80% up to 31 °C, Decreasing to 50% at 40 °C
Pollution Degree (Indoor Use Only) 2
Operation Altitude <2000 m Above Sea Level
  • All specs are valid at 23 ± 5°C and 45 ± 15% relative humidity (non-condensing).
  • This is the weight of the PM5020 power meter excluding all shipped accessories.
  • Non-Condensing


Sensor Compatibility Specs

Item # PM5020
Detector Compatibility Photodiode Power Sensors Thermal Power Sensors
Thermal Position & Power Sensors
Pyroelectric Energy Sensors
Measurement Ranges 21 Ranges: 2 nA to 10 mA
Ranges Selectable in W or A,
Sensor Dependent
9 Ranges: 2 mV to 1 V
Ranges Selectable in W or V,
Sensor Dependent
12 Ranges: 20 mV - 100 V
Ranges Selectable in J or V,
Sensor Dependent
Wavelength Ranges 200 nm - 1800 nm (Sensor Dependent) 190 nm - 25 μm (Sensor Dependent) 185 nm - 25 μm (Sensor Dependent)
Power / Energy Ranges 100 pW - 20 W (Sensor Dependent) 100 μW - 200 W (Sensor Dependent) 10 μJ - 15 J (Sensor Dependent)
Bandwidth DC - 250 kHz, Dependent on Sensor and Settings DC - 1 kHz, Dependent on Sensor and Settings N/A
Max Repetition Rate N/A N/A 80 kHz
Wavelength Correction Sensor Dependent; nm (A/W) Sensor Dependent; nm (V/W) Sensor Dependent; nm (V/J)
Units W, dBm, W/cm2, lx, A W, dBm, W/cm2, V J, J/cm2, W, W/cm2
Accuracy ±0.2% of Full Scale (1 µA - 10 mA Ranges)
±0.5% of Full Scale (2 nA - 400 nA Ranges)
±0.5% of Full Scale ±0.5% of Full Scale
Display Resolution 0.1 pA / Responsivity Value (A/W) 0.1 µV / Responsivity Value (V/W) 1 µV / Responsivity Value (V/J)

For a full list of the sensor head specifications please visit the Photodiode Power Sensors, Thermal Power Sensors, Thermal Position & Power Sensors, or Pyroelectric Energy Sensors pages. For other information, please contact Tech Support.

Interactive Downloadable Demo

Aspheric Lens Design Variables
Click to Enlarge

Screenshot of the Downloadable Interactive GUI

An interactive GUI is available for download to demo all the features of the front panel of the PM5020 power and energy meter console. For computers with a touchscreen, the demo supports all swipe gestures to switch screens. Otherwise, a mouse can be used to interact with these functions. The GUI provides the opportunity to browse all submenus and change settings.

For information on navigating the menus, please see the Display tab above, the PM5020 manual, or, in the GUI, click on the three lines in the top right of the touchscreen, and then select TIPS.  

The physical keys can be operated with the function keys <F1> to <F7> on the keyboard. Turning the control knob is done with the left and right arrow keys, and pressing the knob can be accomplished with the Enter key.

The demo GUI simulates operation with a S120C Photodiode Power Sensor and S405C Thermal Power Sensor Head connected to the device. These sensors can be individually disconnected. The simulated measured power levels for these devices can also be set over several decades.

Download Information

Click the button below to download the PM5020_Demo.exe file required to run the interactive GUI. This GUI requires a computer running Windows 7 or later. 

File Size: 4.2 MB

Software Download

PM5020 Dual-Channel Power and Energy Meter Console Touchscreen Display

The screenshots below provide an overview of some of the measurement settings, measurement views, functions, and calculators accessible through the touchscreen display of the PM5020 console. For a downloadable, interactive GUI to demo all of the touchscreen features, see the Interactive Demo tab. 

Settings Menus
Main Menu Digital I/O Control Panel
PM5020 Main Menu
Click to Enlarge
The main menu gives access to all measurement settings, data handling functions, and local and remote device configuration options. It also includes the laser calculator and settings for the optional accessories. PM5020 Digital I/O Control Panel
Click to Enlarge
The digital I/O control panel allows the user to configure the four I/O ports of the 10-pin PCB connector on the back panel. The pin settings are also used for pass/fail testing, disabling the analog outputs, and logging and shutter control. This control panel is also used to configure the BNC AUX I/O port on the front panel to either a TTL input or output.
Measurement Views
Single-Channel View Dual-Channel View
PM5020 Single-Channel View
Click to Enlarge
The numerical display shows a digital measurement of the power or energy with a bar graph along the bottom. The triangles on the bar graph show the min and max values detected during the measurement. The six rectangular subpanels immediately above the power or energy measurement are configurable displays, allowing the user to select additional parameters to view.

The four buttons on the bottom give quick access to wavelength correction, delta mode, zeroing, and attenuation correction.
PM5020 Dual-Channel View
Click to Enlarge
The dual-channel view shows the measurements from both channels, each accompanied by a bar graph visualization. The channel readings can be configured using the dynamic side menu. The dynamic side menu can only adjust the settings of one active channel at a time. The active channel is marked by either a blue (channel 1) or green (channel 2) indicator on the right-hand side.

The four buttons below the bar graph give quick access to wavelength correction, delta mode, zeroing, and attenuation correction.
Analog Needle View Position View (Thermal Position Sensors Only)
PM5020 Analog Needle View
Click to Enlarge
Measurements can be viewed with a simulated analog needle. The blue triangles are resettable indicators for the max and min measured power. The scale can be zoomed by a factor of 5. In this view, a power level dependent audio signal can be switched on to support tuning.

The four buttons on the bottom give quick access to wavelength correction, delta mode, zeroing, and attenuation correction.
PM5020 Position View
Click to Enlarge
When used with the S440C or S442C Thermal Position & Power Sensors, the PM5020 console can display the beam position within a Ø1 mm or Ø6 mm circle target representing the sensor surface. An optional trace visualizes the change in position. The total beam power, along with the exact x and y positions, are also displayed in this view.

The four buttons on the bottom give quick access to wavelength correction, delta mode, zeroing, and attenuation correction.
Data Logging View Statistics View
PM5020 Data Logging View
Click to Enlarge
The data logging view shows the power, energy, or position measurement as a function of time for both channels, as well as the readings for all connected temperature sensors. The measurements shown are sensor-dependent and user-configurable. The measurement interval can be set from 1 ms to 1 s. The start/stop conditions can be configured to manual, time, number of samples, or external signal input. After recording the data, zoom and pan functions allow the user to closely examine the data. PM5020 Statistics View
Click to Enlarge
In parallel with the data logging view, a statistics view shows the mean value, standard deviation, and the max/min ratio of the recorded data. Two boxplots give additional information on the statistical distribution of the data of each channel.
Scope View Graph View
PM5020 Scope View
Click to Enlarge
The scope view is a convenient way to watch alternating or CW power signals. A resolution of 10 µs and a sampling rate of up to 100 kS/s can be achieved. PM5020 Graph View
Click to Enlarge
The graph view allows the user to examine the recorded data. When applicable, it is possible to switch between power, temperature, or position records. To closely examine portions of the graph, use the zoom and pan functions of the display or the rotary control knob.
Calculations
Math View Calculator View
PM5020 Math View
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The math view allows the user to perform independent calculations on one or both channels. This view offers the calculation result based on the live measurement values of each channel (also displayed at the bottom of the panel), and six configurable subpanels. PM5020 Calculator View
Click to Enlarge
The PM5020 console features several calculators. The laser calculator screen allows the user to calculate laser beam parameters for CW and pulsed signals. A unit converter provides quick conversions between Watts and dBm or between wavelength, frequency, wavenumbers, and photon energy.

The channel wizard buttons import the actual measurement and settings values from channel 1 or channel 2 into the calculator.
Web Browser View
PM5020 Web View
Click to Enlarge
When the PM5020 console is connected to a network via Ethernet, it is possible to view the instrument by entering the IP address shown in the interface settings to the web browser of any PC within the same network.

The displayed website shows the measurement values of both channels, the math view, connected temperature or humidity sensors, and the I/O settings and shutter control.
The web browser allows the user to easily download recorded data and screenshots or watch the device log.

Front Panel

Back Panel

Callout Description
1 Display with Touch Screen
2 Power Button
3 Side Menu Buttons
4 Rotary Knob
5 Auxiliary Input/Output
(BNC Female, TTL 5 V Max)
6 Channel Button
Callout Description Callout Description
1 Y1 and Y2 Position
(BNC Female, -5 to 10 V)
8 DE-9 RS232 Connector
2 X1 and X2 Position
(BNC Female, -5 to 10 V)
9 RJ45 Ethernet Connector
3 Analog Out: AN1 and AN2
(BNC Female, -2.5 to 10 V)
10 IEC-60320 C14 Power Inlet
4 DE-9 Sensor Input Connectors 11 Type B USB Connector
5 10-Pin PCB Connector
Digital I/O Terminal
12 4 mm Banana Socket
Ground Terminal
6 2.5 mm Stereo Audio
NTC Connectors
13 2.5 mm Mono Audio
Interlock Connector
7 10-Pin PCB Connector
Fan & NTC Terminal
14 Hirose HR10A-7R-6S
Shutter Connector

Pin Diagrams

Pin Function Connection Pin Function Connection
1 Power Supply +5 V (Max Current 50 mA from this Pin) 6 DGND Digital Ground for EEPROM and 5 V Output
2 EEPROM Sensor Memory for the Calibration Data 7 PRESENT Sensor Recognition, NTC Input.
Connect a 1 kΩ - 10 kΩ Resistor to
Pin 3 (AGND) to Enable a Custom Sensor
3 AGND Analog Ground for Photodiode,
Thermal, Pyroelectric Sensor, NTC
4 PD - /
TH Q3
Photodiode Cathode Input
Thermal Position Sensor Input Quadrant 3
8 TH + /
TH Q1
Thermal Sensor +
Thermal Position Sensor Input Quadrant 1
5 PY + /
TH Q4
Pyroelectric Sensor Input
Thermal Position Sensor Input Quadrant 4
9 TH Q2 Thermal Position Sensor Input Quadrant 2

Channel 1 and Channel 2 Sensor Connectors

DE-9 Female

DE-9 Female

Pin Function Connection
1 N.C. Not Connected
2 TxD RS232: Connect to PC Terminal RxD (PC DE-9 Pin 2)
3 RxD RS232: Connect to PC Terminal TxD (PC DE-9 Pin 3)
4 N.C. Not Connected
5 GND RS232 Signal Ground: Connect to PC Terminal Ground (PC DE-9 Pin 5)
6,7,8,9 N.C. Not Connected


DE-9 RS232 Connector

RS232 Female

Pin Function Connection Pin Function Connection
1 I/O 0 Input/Output Ports
(Alternative Function: Pass/Fail or Disable Analog Ports)
6 GND Ground
2 I/O 1 7 SCL I2C Bus Clock
3 I/O 2 Input/Output Port
(Alternative Function: Shutter Control or Shutter Monitor)
8 SDA I2C Bus Data
4 I/O 3 Input/Output Port
(Alternative Function: Logging Control or Logging Monitor)
9 3V3 Power Supply for Accessories,
3.3 V, 100 mA Max
5 TRIG Trigger Input/Output 10 5 V Power Supply for Accessories,
5 V, 100 mA Max

Digital I/O

10-Pin PCB Connector

PCB Connector

Pin Function Connection Pin Function Connection
1 NTC 1 Input External NTC 1 6 GND Ground Fan 1
2 GND Ground NTC 2 7 TAC 1 Optional Tacho Signal of Fan 1
3 NTC 2 Input External NTC 2 8 FAN 2 Supply Fan 2
4 GND Ground NTC 2 9 GND Ground Fan 2
5 FAN 1 Supply Fan 1 10 TAC 2 Optional Tacho Signal of Fan 2


Fan Control

10-Pin PCB Connector

PCB Connector

PFM450E Shipping List
Click to Enlarge

Items Included with PM5020 (North American Power Cord Shown)

Item # PM5020 includes the following:

  • Dual-Channel Benchtop Optical Power and Energy Meter Console
  • USB 2.0 Cable, 2 m
  • Two Printed Circuit Board Connectors: FMC1.5/10-STF-3.5
  • Region-Specific Power Cord
  • Quick Reference
  • 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
  • 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

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.

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 PM160, PM160T, and PM160T-HP power meters are equipped with Bluetooth® connections.

Optical Power Meter Utility
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Power Measurement Mode: Set up and configure up to eight power meters.
Optical Power Meter Utility
Click to Enlarge

Power Tuning Mode: Simulated analog needle and digital measurement value provided. Delta Mode, enabled above, shows the fluctuation range during the measurement period.
Optical Power Meter Utility
Click to Enlarge

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

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

Position Statistics Mode: Statistics mode also provides aggregate information for thermal position & power sensors.
Optical Power Meter Utility
Click to Enlarge

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.

Standard Photodiode Sensor Mounting Options

The compact design of Thorlabs' Standard Photodiode Sensors allows easy integration into existing setups. Typical mounting configurations including post, cage, and lens tube options are available. Shown on this page are several different choices for mounting these sensors.

The Standard Photodiode Sensors are compatible with all S120-xx series fiber adapters. FC/PC and SMA adapters are shown on the right. Adapters for FC/APC, SC, LC, and ST connections are also available.

Flip mounts are convenient for quick power measurements from a static location. The sensor can be placed in the path of the laser beam for the power measurement and flipped down during normal operation of the system.

FM90(/M) Right-Angle Flip Mounts are shown to the right. Thorlabs also offers the TRB1(/M) Articulating Post Mount. The lockable articulating mount offers almost unlimited positioning of the sensor head.

The Standard Photodiode Sensors also feature externally SM1-threaded connections on the front face. The SM1 threading provides easy mounting to 1" lens tube systems and quick release mounts.

Shown to the right are the KB1P(/M) Quick-Release Post Mount and QRC1A Quick-Release 30 mm Cage Mount. Both mounts feature SM1 threaded connections to the sensor heads.

Note: Due to the thickness of the S12xC sensor, the QRC1A and CP44F (shown below) quick-release mounts can only be fully removed from the cage system by backing them off an open end. The two mounts are easily removed from the cage system if only three cage rods are used. See the picture on the right.

Thorlabs also offers the CP44F 30 mm Cage Plates with Quick-Release Mounts. These mounts feature magnetically coupled front and back plates for easy and repeatable mounting.

Note: Like the QRC1A, the CP44F cannot be removed from a closed cage system.

Slim Photodiode Sensor Mounting Options

Thorlabs' Slim Photodiode Sensors are designed to fit into space-restricted environments such as 30 mm cage systems and optic-dense free-space arrangements.

Shown to the right is a S130C Sensor inserted into a 30 mm cage system. The application shown highlights the ease with which the sensor can be inserted into the cage, and the minimal space needed to take a power measurement.

The Slim Photodiode Sensors may also be mounted on a TRB1(/M) Articulating Mount. This mount allows repeatable insertion of the sensor into tight optic arrangements. After the measurement is made, the sensor may be rotated out of the beam path for normal operation.

Compact Slim Photodiode Sensor Mounting Options

Thorlabs' Compact Slim Photodiode Sensors are designed to fit into even tighter spaces such as 16 mm cage systems, our slotted Ø1/2" lens tubes, and other optic-dense free-space arrangements.

Shown to the right is an S116C Sensor inserted into a 16 mm cage system. The application shown highlights the ease with which the sensor can be inserted into the cage, and the minimal space needed to take a power measurement.

The compact slim photodiode sensor has two 8-32 (M4) taps for post mounting. One tap mounts the sensor horizontally, as seen to the right, and one allows it to be mounted vertically. The sensor may also be mounted on a TRB1(/M) Articulating Mount. This mount allows repeatable insertion of the sensor into tight optic arrangements. After the measurement is made, the sensor may be rotated out of the beam path for normal operation.

Microscope Slide Photodiode Sensor Mounting Options

S170C Post Mounted with RA90
S170C Mounted on a Post

The S170C may be post mounted via the 8-32 (M4) tap in the side of the housing.

The S170C Microscope Slide Power Sensor is designed so that it can be mounted directly in a microscope slide holder. The 76.0 mm x 25.2 mm x 5.0 mm sensor head has the same footprint as a standard microscope slide and is compatible with most standard upright and inverted microscopes. The photo to the right shows the power sensor flipped over so that the engraved back of the housing can be used for alignment.

This power sensor also has an 8-32 (M4) tap for post mounting. In the photo to the far right, an RA90(/M) is used with two Ø1/2" posts to mount the sensor head in a horizontal orientation.

Integrating Sphere Photodiode Sensor Mounting Options

Thorlabs' Integrating Sphere Photodiode Sensor provides a low loss cavity for diverging, non-uniform, or off-axis beam measurements. These integrating spheres are ideal for all fiber-based applications due to the beam divergence at the end of the fiber.

Shown to the right is an S140C Integrating Sphere with S120-FC Fiber Adapter. Also shown is an S140C with an S140-BFA Bare Fiber Adapter. The Bare Fiber Adapter features a mounting clamp and light shield to decrease interference from ambient light.

Compact Fiber Photodiode Sensor Mounting Options

Thorlabs' Compact Fiber Photodiodes are the ideal choice for a portable, fiber-coupled power meter. The S15xC sensors are compatible with a wide variety of fiber connections. PM20-xx adapters are available to couple FC, APC, SMA, ST, SC, and LC connectors with the sensors. Shown to the right is an S150C Sensor with FC and SMA connector adapters.

Shown to the far right is a PM100D console with S150C sensor connected to a FC connectorized optical fiber. This setup is ideal for portable use in the lab or in the field.

Pyroelectric Energy Sensor Mounting Options

Thorlabs' Pyroelectric Energy Sensors are ideal for measuring pulsed sources. These pyroelectric sensors provide direct energy readings for those sources. The sensors are designed to handle medium- to high-energy pulses from excimer, YAG, and other high-power lasers.

Each sensor ships with an insulating adapter for Ø1/2" post mounting, and they are also compatible with our 30 mm cage system, as shown to the right.

Handheld Power Meter with iPad
Click to Enlarge

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 the lower right table 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.
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. The expandable table below sorts our sensors by type (e.g., photodiode, thermal, or pyroelectric) and provides key specifications.

Alternatively, the selection guide graphic further below arranges our entire selection of photodiode and thermal power sensors by wavelength (left) or optical power range (right). 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.

Photodiode Power Sensors
Thermal Power Sensors
Thermal Position & Power Sensors
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.
  • 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 Options
(Arranged by Wavelength Range)

Sensors by Wavelength

Sensor Options
(Arranged by Power Range)

Sensors by Power

Sensor Key


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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 below 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 PM101R PM101U PM102U PM103U PM100USB
(Click Photo to Enlarge) PM101 PM102 PM103 PM101A PM102A PM103A PM101R PM101U PM102U PM103U PM100USB
Operation Protocol USB, RS232, UART,
and Analog
USB and Analog SMA USB and
RS232
USB Operation USB
Sensor Compatibility
Photodiode - - -
Thermal Power - - -
Thermal Position & Power - - - - - - - -
Pyroelectric - - - - - - - a
Key Features
C-Series Sensor
DE-9 Connector
USB Connector Lockable Lockable Lockable Lockable Not Lockable
Serial DE-9 Connector - - - -
SMA Connector(s) - 1 Analog Power Output 3 Ports: Power, X-Position, and Y-Position 3 Ports: AO1, AO2, and
Digital I/O (Configurable as External Trigger Input)
- - -
DA-15 Universal Connector with
2 Auxiliary I/O Ports
GPIO Ports Also Configurable as Trigger Input (Pin 2) or for Pass/Fail Analysis (Pin 3) - - - -
External Temperature
Sensor Input
(Sensor Not Included)
NTC Thermistor - - - -
Display
Type No Built-In Display; Controlled via GUI for PC
Refresh Rateb Up to 1000 Hz Up to 1000 Hz Up to 1000 Hz Up to 1000 Hz Up to 300 Hz
Measurement Viewsc
Numerical Requires PC
Simulated Analog Needle Requires PC
Bar Graph Requires PC
Trend Graph Requires PC
Histogram Requires PC
Statistics Requires PC
Memory
Type Internal Non-Volatile Memory
for All Settings
Internal Non-Volatile Memory
for All Settings
Internal Non-Volatile Memory for All Settings Internal Non-Volatile Memory
for All Settings
-
Power
External 5 VDC via USB or
5 to 36 VDC via DA-15 Pins 1 and 9
5 VDC via USB 5 VDC via USB 5 VDC via USB 5 VDC via USB
  • 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.

Dual-Channel Benchtop Optical Power and Energy Meter Console

  • Single- and Dual-Channel Measurements
  • All Functions Accessible by Both Touchscreen and Physical Controls
  • Remote Operation and Network Capabilities Via USB, Ethernet, or RS232
  • 8 GB Internal Memory

The PM5020 Dual-Channel Optical Power and Energy Meter Console interfaces with one or two connected sensors to measure continuous wavelength and modulated light sources. This console is compatible with over 35 power, position, and energy sensors. 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.

Please note that sensors are not included with the PM5020 console. For information about our compatible sensors, see the sensor descriptions below. Thorlabs offers a recalibration service for the PM5020 console, which can be ordered below (see Item # CAL-PM2).

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
PM5020 Support Documentation
PM5020Dual-Channel Benchtop Optical Power and Energy Meter Console
$3,465.00
Lead Time

Standard Photodiode Power Sensors

S120C and quick release 30mm Cage System
Click to Enlarge
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 Below)
  • 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 a recalibration service for these photodiode power sensors, which can be ordered below (see Item # CAL-UVPD for UV-extended Si sensors, Item # CAL-PD for Si sensors and Item # CAL-IRPD for Ge sensors).

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 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 PM400PM100D, PM100A, and PM5020
Compatible Interfaces PM101, PM101A, PM101RPM101U, PM103, PM103A, 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 mW
$484.48
Today
S120C Support Documentation
S120CStandard Photodiode Power Sensor, Si, 400 - 1100 nm, 50 mW
$349.40
7-10 Days
S121C Support Documentation
S121CStandard Photodiode Power Sensor, Si, 400 - 1100 nm, 500 mW
$379.68
Today
S122C Support Documentation
S122CStandard Photodiode Power Sensor, Ge, 700 - 1800 nm, 40 mW
$697.61
7-10 Days

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 mW
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 mW
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
S130C Sensor in a 30 mm Cage

Click for Details

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 mW
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
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 a recalibration service for these photodiode power sensors, which can be ordered below (see Item # CAL-UVPD2 for UV-extended Si sensors, Item #CAL-PD2 for Si sensors, and Item # CAL-IRPD2 for Ge sensors).

Item #a S130VC S130C S132C
Sensor Image
(Click the Image to Enlarge)

S130VC

S130C

S132C

Aperture Size Ø9.5 mm
Wavelength Range 200 - 1100 nm 400 - 1100 nm 700 - 1800 nmb
Power Range
(with Filter)
500 pW - 0.5 mWc
(Up to 50 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, PM101RPM101U, PM103, PM103A, 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.
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.
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, 50 mW
$703.44
Today
S130C Support Documentation
S130CSlim Photodiode Power Sensor, Si, 400 - 1100 nm, 500 mW
$581.15
Today
S132C Support Documentation
S132CSlim Photodiode Power Sensor, Ge, 700 - 1800 nm, 500 mW
$825.73
7-10 Days
SM1A29 Support Documentation
SM1A29Customer Inspired! SM1 Thread Adapter for Slim Photodiode Sensors
$48.05
Today
FBSM Support Documentation
FBSMFiberBench Mount for Slim Photodiode Sensors
$47.74
Lead Time

Compact Slim Photodiode Power Sensor

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% (451 - 1000 nm)
±5% (400 - 450 nm, 1001 - 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, 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 the application photo below, 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 below.

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 a recalibration service for these photodiode power sensors, which can be ordered below (see Item # CAL-PD for Si sensors).


Click to Enlarge
View Imperial Product List
Item #QtyDescription
Imperial Product List
S116C1Compact Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 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, 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
S116C Sensor in a 16 mm Cage System

Click for Details

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, 50 mW
$430.50
Today
SM05A29 Support Documentation
SM05A29SM05-Threaded Adapter for Compact Slim Photodiode Sensors
$45.20
Lead Time

Microscope Slide Photodiode Power Sensor

Item #a S170C
Sensor Image
(Click Image to Enlarge)
S170C Microscope Slide Power Head
Overall Dimensions 76.0 mm x 25.2 mm x 5.0 mm
(2.99" x 0.99" x 0.20")
Active Detector Area 18 mm x 18 mm
Input Aperture 20 mm x 20 mm
Wavelength Range 350 - 1100 nm
Optical Power Working Range 10 nW - 150 mW
Detector Type Silicon Photodiode
Linearity ±0.5%
Resolutionb 1 nW
Calibration Uncertaintyc ±3% (440 - 980 nm)
±5% (350 - 439 nm)
±7% (981 - 1100 nm)
Responsivityd (Click for Plot) Typical Responsivity
Raw Data
Neutral Density Filter Reflective (OD 1.5)
Cable Length 1.5 m
Post Mounting Universal 8-32 / M4 Tap, Post Not Included
Compatible Consoles PM400PM100D, PM100A, and PM5020
Compatible Interfaces PM101, PM101A, PM101RPM101U, PM103, PM103A, 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.
  • Wavelength Range: 350 nm to 1100 nm
  • Sensitive to Optical Powers from 10 nW to 150 mW
  • 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
  • Index Matching Gel Utilized in Design to Prevent Internal Reflections
  • Information Stored in Connector
    • Sensor Data
    • NIST- and PTB-Traceable Calibration Data
  • Post Mountable via 8-32 (M4) Tap

The S170C Microscope Slide Power Sensor Head is a silicon photodiode sensor designed to measure the power at the sample in microscopy setups. The silicon photodiode can detect wavelengths between 350 nm and 1100 nm at optical powers between 10 nW and 150 mW. 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 photodiode has an 18 mm x 18 mm active area and is contained in a sealed housing behind a neutral density (ND) filter with OD 1.5. 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 bottom of the 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.

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-PD recalibration service available below. Please contact technical support for more information.

Thorlabs also offers a Microscope Slide Sensor Head with a thermal sensor; for complete specifications, the full presentation can 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
S170C Support Documentation
S170CCustomer Inspired! Microscope Slide Power Sensor, 350 - 1100 nm, 150 mW
$1,298.56
7-10 Days

Microscope Slide Thermal Power Sensor

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 PM400PM100D, PM100A, and PM5020
Compatible Interfaces PM101, PM101A, PM101RPM101U, 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
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

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 the image to the right, 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, 2 W
$1,298.56
Today

Integrating Sphere Photodiode Power Sensors

S142C and S140-BFA Bare Fiber Adapter
Click to Enlarge
S142C and S140-BFA Bare Fiber Adapter (Sold Separately)
S142C and S120-FC Fiber Adapter
Click to Enlarge

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, or Ø12 mm Input Aperture
  • Removable S120-FC Fiber Adapter (FC/PC and FC/APC) Included
  • Compatible Fiber Adapters for Terminated and Bare Fiber (See Table Below)
  • 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.

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.

The integrating spheres below feature large Ø5 mm, Ø7 mm, or Ø12 mm apertures, externally SM1-threaded (1.035"-40) front connections, enhanced shielding against electromagnetic interference, and an over-temperature alert sensor. 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. NIST-traceable data is stored in the sensor connector.

Thorlabs offers a recalibration service for these photodiode power sensors, which can be ordered below. See Item # CAL-PD for Si sensors, Item # CAL-IRPD for InGaAs sensors, and Item # CAL-MIRPD for extended InGaAs or MCT sensors.

Item #a S140C S142C S144C S145C S146C S148C S180C
Sensor Image
(Click the Image
to Enlarge)
S140C S142C S144C S145C S146C S144C Mid-IR Detector
Aperture Ø5 mm Ø12 mm Ø5 mm Ø12 mm Ø5 mm Ø7 mm
Wavelength Range 350 - 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 1 µW - 500 mW 1 µW - 3 W 10 µW - 20 W 1 µW - 1 W 1 µW - 3 W
Detector Type Si Photodiode InGaAs Photodiode Extended InGaAs Photodiode MCT (HgCdTe)
Photodiode
Linearity ±0.5%
Resolutionb 1 nW 10 nW 1 nW 10 nW
Measurement
Uncertaintyc
±3% (440 - 980 nm)
±5% (350 - 439 nm)
±7% (981 - 1100 nm)
±5%
Responsivityd
(Click for Plot)

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 mm
Cable Length 1.5 m
Post Mounting 8-32 and M4 Taps
Aperture Thread 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, and S140-BFA Bare Fiber Adapter (Not Included)
Compatible Consoles PM400PM100D, PM100A, and PM5020
Compatible Interfaces PM101, PM101A, PM101RPM101U, PM103, PM103A, 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 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, 500 mW
$802.43
Today
S142C Support Documentation
S142CIntegrating Sphere Photodiode Power Sensor, Si, 350 - 1100 nm, 5 W
$1,113.38
Today
S144C Support Documentation
S144CIntegrating Sphere Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 500 mW
$942.20
Today
S145C Support Documentation
S145CIntegrating Sphere Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 3 W
$1,156.48
Today
S146C Support Documentation
S146CIntegrating Sphere Photodiode Power Sensor, InGaAs, 900 - 1650 nm, 20 W
$1,156.48
Today
S148C Support Documentation
S148CCustomer Inspired! Integrating Sphere Photodiode Power Sensor, Extended InGaAs, 1200 - 2500 nm, 1 W
$967.81
Today
S180C Support Documentation
S180CIntegrating Sphere Photodiode Power Sensor, MCT (HgCdTe), 2.9 - 5.5 µm, 3 W
$4,207.80
Today

Fiber Photodiode Power Sensors

S150C and PM100D
Click to Enlarge

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 Below)
  • 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 a recalibration service for these photodiode power sensors, which can be ordered below (see Item # CAL-PD for Si sensors and Item # CAL-IRPD for InGaAs sensors).

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

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-STPM20-SC, and PM20-LC
Compatible Consoles PM400PM100D, PM100A, and PM5020
Compatible Interfaces PM101, PM101A, PM101RPM101U, PM103, PM103A, 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, 5 mW
$349.40
Today
S151C Support Documentation
S151CCompact Fiber Photodiode Power Sensor, Si, 400 - 1100 nm, 20 mW
$398.31
Today
S154C Support Documentation
S154CCompact Fiber Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 3 mW
$501.95
Today
S155C Support Documentation
S155CCompact Fiber Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 20 mW
$575.33
Lead Time

High-Resolution Thermal Power Sensors

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, PM101RPM101U, 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

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 the plot below.

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 the photo to the right.

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

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, 1 W, Ø10 mm
$845.52
7-10 Days
S405C Support Documentation
S405CThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 5 W, Ø10 mm
$803.82
Lead Time

Thermal Sensors for Max Powers of 10 W

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 PM400PM100D, PM100A, and PM5020
Compatible Interfaces PM101, PM101A, PM101RPM101U, 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

The absorption curves of each of the thermal power sensors designed for use with low and medium power optical sources.
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S415C Support Documentation
S415CThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 10 W, Ø15 mm
$828.94
Today
S425C Support Documentation
S425CThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 10 W, Ø25.4 mm
$904.30
Today

Thermal Sensors for Max Powers from 40 W to 200 W

Thermal Sensor Absorption Mid-Power Thermal
Click to Enlarge

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).


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% @ 351 nm
±5% @ 190 nm - 1100 nm
±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, PM101RPM101U, 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.
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S350C Support Documentation
S350CThermal Power Sensor Head, Surface Absorber, 0.19 - 1.1 µm and 10.6 µm, 40 W, Ø40 mm
$1,250.80
Today
S425C-L Support Documentation
S425C-LThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 50 W, Ø25.4 mm
$979.66
Today
S322C Support Documentation
S322CThermal Power Sensor Head, Surface Absorber, 0.25 - 11 µm, 200 W, Ø25 mm, Fan Cooled
$1,548.96
Today

Thermal Sensors for High Max Power Density Laser Pulses

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 PM400PM100D, PM100A, and PM5020
Compatible Interfaces PM101, PM101A, PM101RPM101U, 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

This absorption curve is shown over a broader wavelength range than the sensors' operating ranges. See the table for the operating wavelength range of each sensor.
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S370C Support Documentation
S370CThermal Power Sensor Head, Volume Absorber, 0.4 - 5.2 µm, 10 W, Ø25 mm
$1,298.56
Today
S470C Support Documentation
S470CThermal Power Sensor Head, Volume Absorber, 0.25 - 10.6 µm, 0.1mW - 5W, Ø15 mm
$1,321.86
7-10 Days

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
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.
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S440C Support Documentation
S440CThermal Power Sensor Head, Position Sensing, 0.19 - 20 µm, 5 W, 17 mm x 17 mm
$1,377.60
7-10 Days
S442C Support Documentation
S442CThermal Power Sensor Head, Position Sensing, 0.19 - 20 µm, 50 W, Ø17.5 mm
$1,216.16
7-10 Days

Standard Pyroelectric Energy Sensors

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, 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 to the Right 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 the table to the right). 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. Calibration values for both 1 MΩ and 100 kΩ resistors are given with the sensor certificate of calibration. 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).

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ES111C Support Documentation
ES111CPyroelectric Energy Sensor, Black Coating, 0.185 - 25 µm, 150 mJ, Ø11 mm, 40 Hz
$1,476.74
Today
ES120C Support Documentation
ES120CPyroelectric Energy Sensor, Black Coating, 0.185 - 25 µm, 500 mJ, Ø20 mm, 30 Hz
$1,537.31
Today
ES145C Support Documentation
ES145CPyroelectric Energy Sensor, Black Coating, 0.185 - 25 µm, 2 J, Ø45 mm, 30 Hz
$1,774.89
Today

High-Energy Pyroelectric Energy Sensors

ES220C with a 30 mm Cage System
Click to Enlarge

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 Below 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. Calibration values for both 1 MΩ and 100 kΩ resistors are given with the sensor certificate of calibration. 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).

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, PM103U, and PM100USB
  • For complete specifications, please see the Specs tab here.
  • @ 1 MΩ Load Resistor
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ES220C Support Documentation
ES220CPyroelectric Energy Sensor, Ceramic Coating, 0.185 - 25 µm, 3 J, Ø20 mm, 30 Hz
$1,845.94
Today
ES245C Support Documentation
ES245CPyroelectric Energy Sensor, Ceramic Coating, 0.185 - 25 µm, 15 J, Ø45 mm, 30 Hz
$2,144.07
Today

Fast Pyroelectric Energy Sensors

  • For High Repetition Rate Measurements
  • Two Coatings Available:
    • Black Broadband Coating with Flat Response from 185 nm to 25 µm
    • Metal Coating for Fast Pulse Lasers with Repetition Rates of up to 10 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 Below or the Console Selection Tab)
  • See the Full Web Presentation for More Information

These Fast Pyroelectric Sensors are designed to measure pulsed coherent and incoherent sources with high repetition rates up to 10 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 E4xxC sensors can detect repetition rates up to 10 kHz, depending on the sensor size, 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).

Item #a ES308C ES312C ES408C ES412C
Sensor Image
(Click the Image to Enlarge)
ES308C ES312C ES408C ES412C
Input Aperture Size Ø8 mm Ø12 mm Ø8 mm Ø12 mm
Wavelength Range 0.185 - 25 µm 0.185 - 2.5 µm
Energy Range 500 µJ - 1 J 100 µJ - 1 J 100 µJ - 1 J 50 µJ - 500 mJ
Max Repetition Rateb 1 kHz 250 Hz 10 kHz 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 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 Ø38 mm x 15 mm
Active Detector Area 50.3 mm2 113.1 mm2 50.3 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 PM5020 PM400, PM100D, and PM5020
Compatible Interfaces PM103, PM103A, PM103U, and PM100USB PM103, PM103A, and PM103U PM103, PM103A, PM103U, and PM100USB
  • For complete specifications, please see the Specs tab here.
  • @ 1 MΩ Load Resistor
  • Including SM1 Thread Depth
Based on your currency / country selection, your order will ship from Newton, New Jersey  
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ES308C Support Documentation
ES308CPyroelectric Energy Sensor, Black Coating, 0.185 - 25 µm, 1 J, Ø8 mm, 1 kHz
$1,365.00
Today
ES312C Support Documentation
ES312CPyroelectric Energy Sensor, Black Coating, 0.185 - 25 µm, 1 J, Ø12 mm, 250 Hz
$1,417.50
Today
ES408C Support Documentation
ES408CPyroelectric Energy Sensor, Metal Coating, 0.185 - 2.5 µm, 1 J, Ø8 mm, 10 kHz
$1,417.50
Today
ES412C Support Documentation
ES412CPyroelectric Energy Sensor, Metal Coating, 0.185 - 2.5 µm, 500 mJ, Ø12 mm, 2 kHz
$1,470.00
Today

Recalibration Service for Photodiode Power Sensors

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

Thorlabs offers recalibration services for our photodiode optical power 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.

Refer to the table to the right 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." 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. 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-UVPDRecalibration Service for S120VC UV-Extended Silicon Photodiode Power Sensor
Part Number:  Serial Number:
$189.42
Lead Time
CAL-PD Support Documentation
CAL-PD Recalibration Service for Single-Power-Range Silicon Photodiode Power Sensors
Part Number:  Serial Number:
$164.20
Lead Time
CAL-UVPD2 Support Documentation
CAL-UVPD2Recalibration Service for S130VC Extended-UV Silicon Photodiode Power Sensor
Part Number:  Serial Number:
$224.94
Lead Time
CAL-PD2 Support Documentation
CAL-PD2Recalibration Service for Dual-Power-Range Silicon Photodiode Power Sensors
Part Number:  Serial Number:
$191.01
Lead Time
CAL-IRPD Support Documentation
CAL-IRPD Recalibration Service for Single-Power-Range Germanium or InGaAs Photodiode Power Sensors
Part Number:  Serial Number:
$185.18
Lead Time
CAL-IRPD2 Support Documentation
CAL-IRPD2Recalibration Service for Dual-Power-Range Germanium or InGaAs Photodiode Power Sensors
Part Number:  Serial Number:
$202.64
Lead Time
CAL-MIRPD Support Documentation
CAL-MIRPDRecalibration Service for Extended InGaAs or MCT Photodiode Power Sensors
Part Number:  Serial Number:
$330.75
Lead Time

Recalibration Service for Thermal Power and Pyroelectric Energy Sensors

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. The table to the upper right 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:
$208.45
Lead Time

Recalibration of Power & Energy Meter Electronics

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 recalibration services are for the power and/or energy meter electronics of our consoles and interfaces. To ensure accurate measurements, we recommend recalibrating annually. Recalibration of a single-channel console or interface is included with these sensor recalibration services 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.

The table to the upper right 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." 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. 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-PM1Recalibration of Single-Channel Power and/or Energy Meter Electronics
Part Number:  Serial Number:
$77.25
Lead Time
CAL-PM2 Support Documentation
CAL-PM2Recalibration of Dual-Channel Power and Energy Meter Electronics
Part Number:  Serial Number:
$206.00
Lead Time