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Power and Energy Meter, USB Only Interface


  • Compact USB Interface for Power and Energy Measurements
  • Red C-Series Connector for Quick Exchange
  • Over 25 Compatible Sensors

PM100USB

Compatible with all C-Type
Power and Energy Sensors

Sensors Not Included

Data Transfer via Hi-Speed USB2.0 to PC

Related Items


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Item # PM100USB
Compatible Sensors Photodiode, Thermal, and Pyroelectric
Optical Power Rangea 100 pW to 200 W
Optical Energy Rangea 3 µJ to 15 J
Available Sensor Wavelength Rangea 185 nm - 25 μm
GUI Display Refresh Rate 300 Hz (PC Dependent)
Input Bandwidtha DC - 100 kHz
Photodiode Sensor Rangeb 50 nA - 5 mA
Thermopile Sensor Rangeb 1 mV - 1 V
Pyroelectric Sensor Rangeb 100 mV - 100 V
  • Sensor Dependent
  • Ranges Selectable in Watts (Photodiode and Thermopile) or Joules (Pyroelectric) and is dependent on the sensor used.

Features

  • Compact Console Interfaces Power and Energy Sensors with a PC
  • Same Functionality as the PM100D Console
  • Advanced Measurement and Display Features
  • Compatible with over 25 Photodiode, Thermal, and Pyroelectric Sensors
  • Sensor and USB PC Connections with Indicator Lights
  • No External Power Supply Required

The PM100USB Console is a compact power and energy meter interface which allows PC control of an attached power or energy sensor. It contains many of the same features as the PM100D and PM100A Consoles, except it does not have a display screen or built-in console controls. Instead, the console and sensor are completely controlled via a USB connection and the supplied software. The PM100USB converts the signal from the attached sensor and transfers it to the PC.

The PM100USB is compatible with more than 25 standard photodiode, slim photodiode, integrating sphere, fiber, thermal, and pyroelectric sensors (see Power Meter Compatibility Chart). Additionally, it allows the connection of unamplified anode or cathode grounded photodiodes with up to 5 mA photocurrent, thermal elements with a maximum output voltage of 1 V, and pyroelectric sensors with a maximum output voltate of 100 V. Depending on the connected sensor, it can measure optical powers in the range from 100 pW to 200 W and energy from 3 µJ to 15 J. When used together with the ultra compact S15xC Series fiber sensor, the PM100USB becomes a compact and portable fiber power meter that is ideal for multi sensor applications.

PM100x Series GUI
PM100USB Control Software

Computer Control
The PM100USB and connected sensor are controlled through a PC running the supplied software. The standard GUI offers three panels for the display of various numeric parameters, a larger main panel and two subpanels. The displayed parameter can be selected, i.e. power, energy and their min or max values as well as their units. The GUI offers data logging with graphical, tabular or histogram representation and statistical evaluation of the measurements. The data can be stored as a text file. A driver set for the integration into 3rd party software or customized applications is provided as well. For driver software, as well as programming reference guides for LabVIEW™, Visual C++, Visual C#, and Visual Basic, please see the Software tab.

Console Design
Like the PM100D the PM100USB features broad current and voltage measurement ranges and the capability of measuring power and energy. The AD converter allows for more measurement ranges of smaller spans, a higher acquisition rate, and higher precision. A selectable bandwidth of either 20 Hz or 100 kHz offers more flexibility and adaptability to specific measurement tasks while using photodiode sensors. The higher bandwidth is optimal for pulse-detection; the lower bandwidth offers better accuracy.

Additionally, the power meter can adapt to the thermal time constant of thermal sensors leading to significantly faster measurements with thermal sensors. Thermal sensors have an individual time constant that can vary greatly from unit to unit. Like the PM100D, the PM100USB can adjust to this individual constant for each sensor and thus minimize the response time of the system (sensor + console).

Fiber Power Meter Option
The compact, integrated, fiber sensors of the S15xC Series can be connected directly to the PM100USB turning the PM100USB into a compact, single unit fiber power meter. Any handling limitations due to cable movements or cable handling are avoided thus making this device ideal for multi-sensor applications that do not require a console but is controlled remotely via PC. The S150C offers exchangeable fiber adapters for FC, SMA, LC, SC, ST, and LC fiber connectors.

Sensor Upgrade Service
Thorlabs' Sensors and PM100USB Console are not compatible with old power meter consoles and sensor heads, respectively. We offer a sensor upgrade service if you want to use your existing sensors with a new power meter console. Note: upgraded sensors will be incompatible with old power meter consoles and new sensors converted to work with older consoles will not be compatible with the PM100USB. Please contact our tech support team for details.

Item # PM100USB
Display
Display Type External PC - Windows Application or Driver Set
Display Screens Windows Application Software Provided
GUI Refresh Rate 300 Hz (Dependent on PC and Settings)
Sensor Interface
Compatible Sensors All Photodiodes, Thermopiles, and Pyros
See below for full sensor specs
AD Converter 16 bit
Connector DB9F
Sensor Temperature Control Thermistor
Temperature Measurement Range -10 to 80 °C
Digital Outputs
Connector / Interface Mini USB / USB2.0
Power
Battery N/A
Charger / DC Input USB / PC Provided
Dimensions and Mounting
Dimensions (LxWxH) 93.1 mm x 60.4 mm x 28.7 mm
(3.67" x 2.38 " x 1.13")
Weight 0.15 kg (0.33 lbs)
Operating Temperature 0 to 40 °C
Storage Temperature -40 to 70 °C

Sensor Compatibility Specs

Item # PM100USB
Detector Compatibility Photodiode Sensors: S1xxC Series
Photodiodes (Max 5 mA)
Thermal Sensors: S3xxC Series
Thermopiles (Max 1V)
Pyroelectric Sensors: ESxxxC Series Pyros (Max 100V)
Measurement Ranges 6 Decades; 50 nA - 5 mA,
Sensor Dependent
4 Decades; 1 mV - 1 V,
Sensor Dependent
4 Decades; 100 mV - 100 V,
Sensor Dependent
Wavelength Ranges 200 nm - 1800 nm 190 nm - 25 μm 185 nm - 25 μm
Power / Energy Ranges 100 pW - 20 W 100 μW - 200 W 10 μJ - 15 J
Selectable Units W, W/cm², dBm, A W, W/cm², dBm, V J, J/cm², W, W/cm2, V
Accuracy ±0.2% of Full Scale (5 µA - 5 mA)
±0.5% of Full Scale (50 nA)
±0.5% of Full Scale (10 mV - 1 V)
±1% of Full Scale (1 mV)
±0.5% of Full Scale (100 mV - 100 V)
Display Resolution 1 pA / Responsivity Value (A/W) 1 µV / Responsivity Value (V/W) 100 µV / Responsivity Value (V/J)
Input Bandwidth DC - 100 kHz,
Dependent on Sensor and Settings
DC - 10 Hz,
Dependent on Sensor and Settings
DC - 3 kHz,
Dependent on Sensor and Settings
Wavelength Correction Sensor Dependent; nm (A/W) Sensor Dependent; nm (V/W) Sensor Dependent; nm (V/J)

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

PM100USB Sensor Connector

D-type Female

DB9 Female

Pin Connection
1 +5 V (Drive max 50 mA from this pin)
2 DO NOT USEa
3 Photodiode Ground (Anode), Thermal and Pyro Sensor Ground, Analog Ground
4 Photodiode Cathode
5 Pyro-Electric Sensor +
6 DGND
7 Present: Connect this Pin via a 1 kΩ to 10 kΩ Resistor
to Pin 3 (AGND) to Enable a Custom Sensor
8 Thermal Sensor +
9 N.C.
  • Pin 2 is only used by the PM100USB to communicate with the EEPROM Digital I/O on Thorlabs sensor heads and must not be used with custom sensors. Connecting this pin may cause the PM100USB to malfunction.

Computer Connection

USB Type Mini-B

USB Mini-B

USB Type Mini-B to Type A Cable Included

Standard Photodiode Sensor Mounting Options

Thorlabs Standard Photosdiode Sensors compact design 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 SC, LC, and ST connections are also available.

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

FM90 Right Angle Flip-Mounts are shown to the right. Thorlabs also offers the TRB1 Articulating Post Mount. The lockable articulating mount offers almost unlimited positioning of the sensor head. The articulating mount is shown on an S13xC Slim Photodiode Sensor below.

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

Shown to the right are the KB1P 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 CP90F (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 mounts are used. See the picture on the right.

Thorlabs also offers the CP90F 30 mm Cage Plates with Quick-Release Mounts. These mounts feature magnetically coupled mounting for easy and repeatable mounting.

Note: Like the QRC1A, the CP90F can not be removed from a closed cage system.

Slim Photodiode Sensor Mounting Options

Thorlabs' Slim Photodiode Sensors are designed to fit into tight optic arrangements such as cages, lens tubs, 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 for which the sensor can be inserted into the cage, and the minimal space needed to take a power measurment.

The Slim Photodiode Sensors may also be mounted on a TRB1 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.

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 a 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, PC, SC, LC, SMA, and ST connectors with the sensors. Shown to the right is a 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 in the lab and in the field use.

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.

Mounting options include post (with insulating adapter) and cage configurations, shown to the right.

Compatible Power and Energy Meters

  • PM100A Analog Power Meter Console
  • PM100D Digital Power and Energy Meter Console
  • PM200 Touchscreen Power and Energy Meter Console
  • PM400 Capacitive Touchscreen Power and Energy Meter Console
  • PM100USB Power Meter USB Interface
  • PM160, PM160T, and PM160T-HP Wireless Handheld Power Meters with Bluetooth®
  • PM16 Series Compact USB Power Meters

The Power Meter Utilities software package is not compatible with the PM320E Benchtop Power Meter.

Software for Touchscreen, Handheld, and USB-Interface Power Meters

All of our touchscreen, handheld, and USB power meters come installed with the Power Meter Utilities software package that allows the power sensors to be controlled through a PC interface; this software is described and available for download below.

Power Meter Utilities Software (Current Release)

Version 1.0.2

GUIs and drivers for Thorlabs' Touchscreen, Handheld, and USB-Interface Power Meters. Contains the Optical Power Meter Utility, Multi Power Meter Utility, and Power Meter Monitor.

Software Download

Power Meter Utilities Software (Current Release)

This software package contains three GUI applications that can be used to control the touchscreen, handheld, or USB-interface power and energy meters remotely.

  • The Optical Power Meter Utility is a general application that can control one power meter connected to a PC via USB. With this GUI, power measurements can be viewed with a bar graph, histogram, or chart. Measurements can be programmed to run over periods of time, and the data can be viewed and saved using the program. It also has a statistics function that analyzes the minimum, maximum, standard deviation, and mean of a set of power measurements.
  • The Multi Power Meter Utility is an application that allows the readout from up to eight power meters to be viewed simultaneously, reducing clutter and allowing easier monitoring of multiple light sources. Each meter's wavelength correction can be individually set. This tool only provides a graph of power or energy versus time and an instantaneous power or energy readout.
  • The Power Meter Monitor allows remote wireless operation of our power meters that use Bluetooth technology (PM160 and PM160T). It can also be used to monitor and control our other touchscreen handheld, and USB-Interface power meters if they are connected via USB.

The software download page also provides firmware updates and programming reference notes for interfacing with our power and energy meter consoles using LabVIEW, Visual C++, Visual C#, and Visual Basic. Please see the Programming Reference tab on the software download page for more information and download links.

Optical Power Meter Utility
Click to Enlarge

Screenshot of the Optical Power Meter Utility
Power Meter Monitor
Click to Enlarge

Screenshot of the Power Meter Monitor
Multi Power Meter GUI
Click to Enlarge

Screenshot of the Multi Power Meter Utility
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. Our photodiode and thermal sensors are compatible with all of Thorlabs' current line of power meter consoles, while our pyroelectric sensors are compatible with all of our current power meter consoles except for the PM100A Analog Power Meter Console. 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 three 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.
  • 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.

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
Pyroelectric Power Sensors (Not Compatible with PM100A)
  • 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 20 ms 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.

Sensor Options
(Arranged by Wavelength Range)

Sensor Options
(Arranged by Power Range)


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Posted Comments:
Poster:jacyjacythomson
Posted Date:2017-04-24 16:15:16.97
Hi I am trying to develop a small program in LabVIEW like the PM100D Simple Example. I need the Commands to send to the instrument. These are similar to : SENS:AVER There should be a Programming Command Manual or a link on your website. Thank you, Jeff
Poster:swick
Posted Date:2017-04-26 04:52:50.0
This is a response from Sebastian at Thorlabs. Thank you for the inquiry. An overview of SCPI commands for our Power Meter Consoles can be found in the manual at chapter "SCPI Commands". I will contact you directly for further assistance.
Poster:asmirnov
Posted Date:2017-02-02 01:10:38.227
We use a number PM100USB interfaces. If two PM100USB connected simultaneously, some of them (about 15% of all) can hang up. It doesn`t depend on NI-VISA RTE/driver/firmware version, MotherBoard model etc. Is it a fabric or software defect?
Poster:swick
Posted Date:2017-02-03 05:41:03.0
This is a response from Sebastian at Thorlabs. Thank you for the feedback. Using more than one PM100USB simultaneously at one operating system should work without problems. The Power Meter Consoles are based on SCPI commands, which avoids driver conflicts in the operating system. A known issue which avoids using multiple devices at the same time could be USB-Hubs, bad quality USB cables and/or a slow PC. I will contact you directly for assistance and troubleshooting.
Poster:ddeng
Posted Date:2017-01-31 19:34:13.383
Could you support this PM100USB under Windows 10? I have one unit.
Poster:wskopalik
Posted Date:2017-02-01 03:22:18.0
This is a response from Wolfgang at Thorlabs. Thank you very much for your inquiry. You can use the software provided on the website to operate the PM100USB. Supported operating systems are Windows® XP (32 bit) SP3 or Windows® Vista, 7, 8.1, or 10 (32 bit, 64 bit). I will contact you directly to provide further assistance.
Poster:ester0904bond
Posted Date:2016-03-28 09:22:41.837
Can this modal do data sampling up to 100kHz? if can, can we do that in labview? thank you
Poster:besembeson
Posted Date:2016-03-28 09:49:18.0
Response from Bweh at Thorlabs USA: This may not be possible, even with a photodiode sensor though we have a 16 bit AD converter in the PM100USB. Speed loss could come from the queries of commands which always checks the availability/status of the sensor. You could write your own routines which allows for faster sampling rates but the USB 2.0 port will limit this and the PM100USB has no analog output to bypass this. You may consider instead the PM100D, PM100A or the PM200.
Poster:roger_york
Posted Date:2016-03-11 19:01:25.26
Is there anyway to interface the PM100USB with a MacBook Air?
Poster:shallwig
Posted Date:2016-03-14 11:53:36.0
This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. At the moment we have unfortunately no drivers available to run our power meter software with Apple OS.
Poster:nherrick
Posted Date:2015-10-22 16:40:57.477
What do you think are the chances of being able to use the PM100USB with a raspberry pi?
Poster:tschalk
Posted Date:2015-10-23 07:11:50.0
This is a response from Wolfgang at Thorlabs. Thank you for your inquiry. A Raspberry Pi usually works with a Linux-based operating system for which we unfortunately can't offer full support. There is however some information about the use of our powermeters in Linux and I will contact you directly about it.
Poster:johnhobbs
Posted Date:2015-09-30 13:34:26.513
Please fix your labview drivers for the PM100USB! I just upgraded to Labview 2015 and your labview drivers now hang up. I can send my labview driver if you want for the PM100USB. bottom line you cannot ini the PM100USB read the power and then close the device multiple times without it hanging up. I think your drives are not properly closing the resources for the device. best, John Hobbs
Poster:shallwig
Posted Date:2015-10-01 09:55:41.0
This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. We checked the drivers with Labview 2015 and could not reproduce this problem. I will contact you directly to troubleshoot this in more detail.
Poster:bo.jing
Posted Date:2015-05-26 17:42:20.707
The inner plastic (grey) USB connector on the PCB board inside the device detached itself at the soldering points. Can I send this unit back for repairs? We are quite disappointed at this obvious point of failure.
Poster:shallwig
Posted Date:2015-05-27 06:33:02.0
This is a response from Stefan at Thorlabs. Thank you very much for contacting us in this matter. We are really sorry for the inconveniences you had through this. I will contact you directly to handle the repair/exchange as soon as possible.
Poster:a.andreski
Posted Date:2015-05-12 17:41:44.017
Is there a way to read out a time-series of datapoints (lets say 1M samples) using your C-series photodioide sensors with a PM100USB but with a specific sampling rate?
Poster:tschalk
Posted Date:2015-05-13 07:02:08.0
This is a response from Thomas at Thorlabs. Thank you very much for your feedback. The maximum achievable sampling rate is about 300Hz. The GUI provides a function called fast logging which enables the maximum logging frequency of the unit. If you want to sample a signal in the MHz range you could use one of our amplified photodetectors in combination with a scope. I will contact you directly to discuss your application.
Poster:catox
Posted Date:2014-07-23 15:14:35.38
It would be great if you could offer a similar product with Serial via USB interface to remove the requirement for NI-VISA installation.
Poster:shallwig
Posted Date:2014-07-23 09:52:01.0
This is a response from Stefan at Thorlabs. Thank you very much for your feedback. At the moment it is not planned to offer the PM100USB in such a configuration. But the PM160 http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=7233&pn=PM160#7267 allows you to communicate with your PC without using VISA as it can additionally to USB also transmit data by Bluetooth. I will contact you directly to discuss your application in detail.
Poster:bagresci
Posted Date:2014-04-17 17:10:32.223
I found a method to communicate with pm100usb. I and using Agilient USBTMC kernel driver with Scientific linux 6.4. (http://www.home.agilent.com/upload/cmc_upload/All/usbtmc.html?&cc=KR&lc=kor). Below is my shell script : ./usbtmc_ioctl 1 reset ./usbtmc_ioctl 1 clear echo INIT > /dev/usbtmc1 while((i<100)) do ./usbtmc_ioctl 1 reset ./usbtmc_ioctl 1 clear echo READ? > /dev/usbtmc1 cat /dev/usbtmc1 ((i=i+1)) done ./usbtmc_ioctl 1 reset ./usbtmc_ioctl 1 clear echo ABOR > /dev/usbtmc1 ./usbtmc_ioctl 1 reset ./usbtmc_ioctl 1 clear
Poster:shallwig
Posted Date:2014-04-17 08:49:33.0
This is a response from Stefan at Thorlabs. Thank you very much for your feedback and sharing this helpful information with us. I will contact you directly to discuss any open questions you have in this matter.
Poster:hadmack
Posted Date:2013-07-08 17:48:23.577
Could you please provide an update on the compatibility of PM100USB with the Linux USBTMC driver?
Poster:tschalk
Posted Date:2013-07-10 08:40:00.0
This is a Response from Thomas at Thorlabs. Thank you very much for your inquiry. To control the device with Linux you would need a USBTMC-driver for Linux and the instrument-driver-code for the corresponding SCPI commands to communicate via the USBTMC driver. The low level specifications are the followings: - Universal Serial Bus Test and Measurement Class Specification (USBTMC) Revision 1.0. USB Implementers Forum. April 14, 2003 - and - Universal Serial Bus Test and Measurement Class, Subclass USB488 Specification (USBTMC-USB488) Revision 1.0. April 14, 2003 - and the command structures are - IEEE Std 488.2-1992; IEEE Standard Codes, Formats, Protocols, and Common Commands For Use With IEEE Std 488.1-1987, IEE Standard Digital Interface for Programmable Instrumentation - and the used command format is - Standard Commands For Programmable Instruments (SCPI) -. You can use the source code of our instrument driver which is an open source code under LGPL. This one can be changed so that it is possible to use the Linux - USBTMC communication instead of the NI functions. I will contact you directly for more detailed information.
Poster:jvigroux
Posted Date:2012-06-20 09:54:00.0
A response from Julien at Thorlabs: Thank you for your feedback! The communication of the PM100USB is based on the USBTMC protocol. We rely on the VISA engine to create a stable overlayer on the USBTMC but if one does not want to use the VISA engine, it is of course possible to address the USB port directly at a USBTMC level. I will contact you to discuss further the possible approaches for the driver implementation you plan.
Poster:gnishi
Posted Date:2012-06-19 20:45:33.0
It would be great to provide the Linux driver or low level USB specification to write the driver. We don't need NI plat form, which consumes huge resources (incl. cost.), to drive this powermeter.
Poster:jjurado
Posted Date:2011-04-06 16:35:00.0
Response from Javier at Thorlabs to last poster: Thank you very much for your feedback. I will share your comments with our design engineers for the PM100USB. Please check back with us at techsupport@thorlabs.com if you would like to check on the status of this project.
Poster:
Posted Date:2011-04-06 18:40:07.0
It would be great to have a product like this compatible with Android, and be able to use on a tablet or smartphone.
Poster:jjurado
Posted Date:2011-02-14 18:14:00.0
Response from Javier at Thorlabs to huw.major: Thank you for submitting your inquiry. The crashing is most likely due to an older firmware version of the PM100USB power meter. You can upgrade to version 1.3 by installing the Device Firmware Upgrade wizard and following the instructions. You can download the firmware application via the following link: http://www.thorlabs.com/software_pages/ViewSoftwarePage.cfm?Code=PM100x I will follow up with you directly.
Poster:huw.major
Posted Date:2011-02-14 11:52:53.0
Hi, I have 3 of these products and am trying to use them for prolonged testing purposes, > 1000Hrs constant use. I find them very easy to set up and use, but I have found that they constantly crash. I am using a Labview 2009 program, based on your supplied Labview example code, which seems to work fine most of the time. However, I am getting sporadic crashed of 1 or more power meters which require a power down to fix. The code is running under Windows 7, do you know of any issues with this combination?
Poster:huw.major
Posted Date:2011-02-14 11:37:25.0
Hi, I have 3 of these products and am trying to use them for prolonged testing purposes, > 1000Hrs constant use. I find them very easy to set up and use, but I have found that they constantly crash. I am using a Labview 2009 program, based on your supplied Labview example code, which seems to work fine most of the time. However, I am getting sporadic crashed of 1 or more power meters which require a power down to fix. The code is running under Windows 7, do you know of any issues with this combination?
Poster:huw.major
Posted Date:2011-02-14 11:32:47.0
Hi I have 3 of these products and am trying to use them for prolonged testing purposes, >1000Hrs constant use. I find them very easy to set up and use, but, I have found that they constantly crash. I am using a Labview 2009 program based on your supplied Labview code which seems to work fine most of the time. However, I am getting sporadic crashes of 1 or more power meters which require a power down to fix. The code is running under Windows 7, do you know of any problems with this combination?
Poster:julien
Posted Date:2011-01-28 11:41:52.0
a response from Julien at Thorlabs: Thank you for your feedback. Several PM100USBs can be connected to the same hub. We actually provide a small utility software that allows to readout up to 8 PM100USB simultaneously. This utility can be downloaded from the software page of the PM100USB. Concerning the Iphone compatibility, the PM100USB software is entirely NI VISA based, which is as of now unfortunately not compatible with Iphones yet.
Poster:mobrien
Posted Date:2011-01-27 12:46:16.0
I was wondering if you have given any thought to making a PM100USB App for the iPhone etc. Our company currently does not provide smartphones or tablets to its employees but you can kind of see where things are heading... On a related topic, we have one of these, could I connect multiple PM100USBs to a single USB port via a USB hub? Mike

Thorlabs offers a wide selection of power and energy meter consoles, ranging from the touch screen PM400 to the analog PM100A. Key specifications of all of our power meter consoles are presented below to help you decide which device is best for your application. We also offer self-contained wireless power meters.

When used with our C-series sensors, Thorlabs' power meter consoles 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 sensors are also capable of displaying the current or voltage delivered by the sensor. Alternatively, a current or voltage equivalent to the measured value is provided at the analog output.

Item # PM100A PM100D PM100USB PM200 PM400 PM320E
(Click Photo to Enlarge) PM100A PM100D PM100USB PM200 PM400 PM320E
Description Analog Power Meter Console Digital Power and Energy Meter Console USB Power and Energy Meter Interface Touchscreen Power and Energy Meter Console Touchscreen Power and Energy Meter Console with Multi-Touch Dual-Channel Benchtop Power and Energy Meter Console
Compatible Sensors Photodiode and Thermal Photodiode, Thermal, and Pyroelectric
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)
3.67" x 2.38 " x 1.13"
(93.1 mm x 60.4 mm x 28.7 mm)
6.70" x 4.93" x 1.48"
(170.2 mm x 125.1 mm x 37.5 mm)
5.35" x 3.78" x 1.16"
(136.0 mm x 96.0 mm x 29.5 mm)
4.8" x 8.7" x 12.8"
(122 mm x 220 mm x 325 mm)
Channels 1 2
External Temperature Sensor Input
(Sensor not Included)
- - - - Instantaneous Readout and Record Temperature Over Time -
External Humidity Sensor Input (Sensor not Included) - - - - Instantaneous Readout and  Record Humidity Over Time -
GPIO Ports - 4, Programmable 4, Programmable -
Source Spectral Correction - - - Yes! Yes! -
Attenuation Correction - - - Yes! Yes! -
External Trigger Input - - -  yes -  yes
Display
Type Mechanical Needle and LCD Display with Digital Readout 320 x 240 Pixel Backlit Graphical LCD Display No Built-In Display
Controlled via GUI for PC
Resistive Touchscreen with Color Display Protected Capacitive Touchscreen with Color Display 240 x 128 Pixels
Graphical LCD 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)
- 4.65" x 3.48"
(118.0 mm x 88.5 mm)
3.7" x 2.1"
(95 mm x 54 mm)
3.7" x 2.4"
(94.0 mm x 61.0 mm)
Refresh Rate 20 Hz Up to 500 Hz
(PC Dependent)
100 Hz 10 Hz (Numerical)
25 Hz (Analog Simulation)
20 Hz
Measurement Viewsa
Numerical yes yes Requires PCb yes yes
Mechanical Analog Needle yes - - - - -
Simulated Analog Needle - yes Requires PCb yes Yes! yes
Bar Graph - yes Requires PCb yes Yes! yes
Trend Graph - yes Requires PCb yes Yes! Yes!
Histogram - yes Requires PCb - - Yes!
Statistics Yes! yes Requires PCb yes Yes! yes
Memory
Type - SD Card - NAND Flash NAND Flash -
Size - 2 GB - 128 MB 4 GB -
Power
Battery LiPo 3.7 V 1300 mAh - LiPo 3.7 V 2600 mAh LiPo 3.7 V 2600 mAh -
External 5 VDC via USB or Included AC Adapter 5 VDC via USB 5 VDC via Included Power Supply 5 VDC via USB Selectable Line Voltage: 100 V, 115 V, 230 V (±10%)
  • These are the measurement views built into the unit. All of our power meter consoles except the PM320E can be controlled using the Power Meter Utilities software package. The PM320E has its own software package.
  • The PM100USB does not have a built-in monitor, so all data displays are through the Optical Power Meter Software GUIs.

Power and Energy Meter, USB Only Interface

USB Power Energy Meter App Clamp
Click for Details
PM100USB Mounted to
Post with ECM225 Clamp
  • Compact USB Power and Energy Meter Interface
  • Compatible with Over 25 Photodiode, Thermal, and Pyroelectric Sensors
  • Console Comes Calibrated with Certificate of Calibration
  • 1 GB USB Memory Stick with Software Including LabVIEW™ and LabWINDOWS™ /CVI Driver Set, and Operating Manual
  • Post-Mountable with ECM100 and ECM225, and Attachable to Other Housings with EPS225

Please note that sensors are not included with the PM100USB console. For information about our compatible sensors, please see the sensor descriptions below.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
PM100USB Support Documentation
PM100USBUSB Power and Energy Meter Interface for C-Type Sensors
$427.38
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Standard Photodiode Power Sensors

S120C and quick release 30mm Cage System
Click to Enlarge
S120C and CP90F 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.

Item #a S120VC S120C S121C S122C
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%
Coating/Diffuser Reflective ND (OD1.5)d Reflective ND (OD1)e Reflective ND (OD2)f 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 Mountingd,e,f Universal 8-32 / M4 Tap, Post Not Included
Aperture Thread External SM1 (1.035"-40)
Compatible Fiber Adapters S120-FC, S120-SMA, S120-ST, S120-LC, and S120-SC (Not Included)
Compatible Consoles PM400, PM200, PM100D, PM100A, PM100USB, and PM320E
  • For complete specifications, please see the Specs tab here.
  • Measured with PM100D console in low bandwidth setting.
  • Beam diameter > 1 mm.
  • 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.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
S120VC Support Documentation
S120VCStandard Photodiode Power Sensor, Si, 200 - 1100 nm, 50 mW
$424.32
Today
S120C Support Documentation
S120CStandard Photodiode Power Sensor, Si, 400 - 1100 nm, 50 mW
$306.00
Today
S121C Support Documentation
S121CStandard Photodiode Power Sensor, Si, 400 - 1100 nm, 500 mW
$332.52
Today
S122C Support Documentation
S122CStandard Photodiode Power Sensor, Ge, 700 - 1800 nm, 40 mW
$610.98
Today

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
CP022SM1-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
CP02/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.

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%
Coating/Diffuser Reflective ND (OD1.5)c Reflective ND (OD2)g 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-FC, S120-SMA, S120-ST, S120-LC, and S120-SC
FBSM: Integrate Sensor into FiberBench Setups
Compatible Consoles PM400, PM200, PM100D, PM100USB, PM100A, and PM320E
  • 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.
  • 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 / Ships
S130VC Support Documentation
S130VCSlim Photodiode Power Sensor, Si, 200 - 1100 nm, 50 mW
$616.08
Today
S130C Support Documentation
S130CSlim Photodiode Power Sensor, Si, 400 - 1100 nm, 500 mW
$508.98
Today
S132C Support Documentation
S132CSlim Photodiode Power Sensor, Ge, 700 - 1800 nm, 500 mW
$723.18
Today
SM1A29 Support Documentation
SM1A29Customer Inspired!SM1 Thread Adapter for Slim Photodiode Sensors
$42.08
Today
FBSM Support Documentation
FBSMFiberBench Mount for Slim Photodiode Sensors
$41.82
Today

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)
Neutral Density Filter Reflective (OD 1.5)
Cable Length 1.5 m
Post Mounting Universal 8-32 / M4 Tap, Post Not Included
Compatible Consoles PM400, PM200, PM100D,
PM100USB, PM100A, and PM320E
  • For complete specifications, please see the Specs tab here.
  • Measured with PM100D console in low bandwidth setting.
  • Beam diameter > 1 mm.
  • Wavelength Range: 350 nm to 1100 nm
  • Sensitive to Optical Powers from 10 nW to 150 mW
  • Designed to Measure Optical Power 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 to locate the 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 CAL1 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 / Ships
S170C Support Documentation
S170CCustomer Inspired!Microscope Slide Power Sensor, 350 - 1100 nm, 150 mW
$1,137.30
Today

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 PM400, PM200, PM100D, PM100USB, PM100A, and PM320E
  • For complete specifications, please see the Specs tab here.
  • Measured with 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-S200 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 / Ships
S175C Support Documentation
S175CCustomer Inspired!Microscope Slide Thermal Power Sensor, 300 nm - 10.6 µm, 2 W
$1,137.30
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.

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 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-SMA, S120-ST, S120-SC, S120-LC, and S140-BFA Bare Fiber Adapter (Not Included)
Compatible Consoles PM400, PM200, PM100D, PM100USB, PM100A, and PM320E
  • 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 / Ships
S140C Support Documentation
S140CIntegrating Sphere Photodiode Power Sensor, Si, 350 - 1100 nm, 500 mW
$702.78
Today
S142C Support Documentation
S142CIntegrating Sphere Photodiode Power Sensor, Si, 350 - 1100 nm, 5 W
$975.12
Today
S144C Support Documentation
S144CIntegrating Sphere Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 500 mW
$825.18
Today
S145C Support Documentation
S145CIntegrating Sphere Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 3 W
$1,012.86
Today
S146C Support Documentation
S146CIntegrating Sphere Photodiode Power Sensor, InGaAs, 900 - 1650 nm, 20 W
$1,012.86
Today
S148C Support Documentation
S148CCustomer Inspired!Integrating Sphere Photodiode Power Sensor, InGaAs, 1200 - 2500 nm, 1 W
$847.62
Today
S180C Support Documentation
S180CIntegrating Sphere Photodiode Power Sensor, MCT (HgCdTe), 2.9 - 5.5 µm, 3 W
$3,685.26
Lead Time

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 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.

Item #a S150C S151C S154C S155C
Sensor Image
(Click the Image to Enlarge)

S150C

S151C

S152C

S153C

Included Connectors FCe & SMA FCe
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%
Resolutionb 10 pW (-80 dBm) 100 pW (-70 dBm) 10 pW (-80 dBm) 100 pW (-70 dBm)
Measurement Uncertaintyc ±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%
Coating/Diffuser N/A Absorptive ND (Schott NG3) N/A
Head Temperature Measurementd NTC Thermistor 3 kΩ
Aperture Thread External SM05 (0.535"-40)
Fiber Adapters Included: PM20-FC and PM20-SMA
Optional: PM20-LC, PM20-SC, and PM20-ST
Included: PM20-FC
Optional: PM20-LC, PM20-SC, PM20-ST, and PM20-SMA
Compatible Consoles PM400, PM200, PM100D, PM100USB, PM100A, and PM320E
  • For complete specifications, please see the Specs tab here.
  • 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.
  • 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-connectorized fiber. 
Based on your currency / country selection, your order will ship from Newton, New Jersey  
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S150C Support Documentation
S150CCompact Fiber Photodiode Power Sensor, Si, 350 - 1100 nm, 5 mW
$306.00
Today
S151C Support Documentation
S151CCompact Fiber Photodiode Power Sensor, Si, 400 - 1100 nm, 20 mW
$348.84
Today
S154C Support Documentation
S154CCompact Fiber Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 3 mW
$439.62
Today
S155C Support Documentation
S155CCompact Fiber Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 20 mW
$503.88
Today

High-Resolution Thermal Sensors

Low Power High Resolution Thermal Sensor Absorption
Click to Enlarge

The S302C has the same absorption curve as the S305C and S310C. The S405 shares the same absorption curve with the S415C, S425C, and S245C-L. (All are sold below.)
  • 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
  • S302C: Extra Insulation Minimizes Measurement Drift
  • S405C: Accomodates Average Optical Power Densities up to 1.5 kW/cm²
  • See the Full Web Presentation for More Information

Thorlabs offers three 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 to the right.

Aperture sizes from Ø9.3 mm to Ø12 mm allow 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 (available here), 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 S302C includes more thermal shielding than our other thermal power sensors. This insulation mitigates the effect of external thermal disturbances on the power measurement. However, the insulation also results in the sensor cooling down more slowly than our other sensors after becoming hot.

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

Item #a S401C S302C S405C
Sensor Image
(Click the Image to Enlarge)
S401C S302C S405C
Wavelength Range 190 nm - 20 µm 190 nm - 25 µm 190 nm - 20 µm
Optical Power Range 10 µW - 1 W (3 Wb) 100 µW - 2 W (2.5 Wb) 100 µW - 5 W 
Input Aperture Size Ø10 mm Ø10 mm with Adapter, Ø12 mm Without Ø10 mm
Active Detector Area
10 mm x 10 mm Ø12 mm 10 mm x 10 mm
Max Optical Power Density 500 W/cm² (Avg.) 200 W/cm² (Avg.) 1.5 kW/cm² (Avg.)
Detector Type Thermal Surface Absorber (Thermopile)
with Background Compensation
Thermal Surface Absorber (Thermopile)
Linearity ±0.5% ±1% ±0.5%
Resolutionc 1 µW 1 µW 5 µW
Measurement Uncertaintyd ±3% @ 1064 nm
±5% @ 190 nm - 10.6 µm
±3% @ 1064 nm
±5% @ 190 nm - 25 µm
±3% @ 1064 nm 
±5% @ 250 nm - 17 µm
Response Timee 1.1 s 12 s
(3 s from 0 to 90%)
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")
Ø40 mm x 41 mm
(Ø1.57" x 1.61")
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 N/A NTC Thermistor
Cable Length 1.5 m
Post Mounting Universal 8-32 / M4 Taps
(Post Not Included)
M4 Threaded Tap,
Includes Ø1/2" Post, 60 mm Long
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 M14 x 1 Internal SM05
Accessories Externally SM1-Threaded Adapter
Light Shield with Internal SM05 Threading
Externally SM1-Threaded Adapter Externally SM1-Threaded Adapter
Compatible Consoles PM400, PM200, PM100D, PM100A, PM100USB, and PM320E
  • 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 and 2 minutes for the S302C. The S405C saturates for optical input powers >5 W.
  • Measurement taken with the PM200 console for the S401C, the PM100D console for the S302C, and the PM400 console for he 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 here for additional information.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
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S401C Support Documentation
S401CThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 1 W, Ø10 mm
$740.52
Today
S302C Support Documentation
S302CThermal Power Sensor Head, Surface Absorber, 0.19 - 25 µm, 2 W, Ø12 mm
$740.52
Today
S405C Support Documentation
S405CNEW!Thermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 5 W, Ø10 mm
$704.00
Today

Thermal Sensors for Max Powers from 5 W to 10 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.
  • Optical Power Resolution of 100 µW or 200 µW
  • S415C and S425C Feature Removable Heat Sinks
  • S305C and S310C Have 4-40 Taps for Use with Our 30 mm Cage Systems
  • All Include a Thermistor Used to Monitor Temperature of Sensor Head
  • 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 here). The housing of the S305C features an aperture with internal SM05 (0.535"-40) threading, the apertures of the S415C and S425C have internal SM1 threading, and the aperture of the S310C is not threaded.

The S305C has slim profile, and a sensor housing that has virtually the same dimensions as a 30 mm cage plate, which makes it particularly useful in tight spaces.

The S415C and S425C 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.

The S310C has 4-40 taps at three corners that are compatible with our 30 mm cage systems

Item #a S305C S415C S310C S425C
Sensor Image
(Click Image to Enlarge)
S305C S415C S310C S425C
Wavelength Range 190 nm - 25 µm 190 nm - 20 µm 190 nm - 25 µm 190 nm - 20 µm
Optical Power Range 10 mW - 5 W (10 Wb) 2 mW - 10 W (20 Wb) 10 mW - 10 W (15 Wb) 2 mW - 10 W (20 Wb)
Input Aperture Size Ø10 mm Ø15 mm Ø20 mm Ø25.4 mm
Active Detector Area
Ø10 mm Ø15 mm Ø20 mm Ø27 mm
Max Optical
Power Density 
200 W/cm² (Avg.) 1.5 kW/cm² (Avg.) 200 W/cm² (Avg.) 1.5 kW/cm² (Avg.)
Detector Type Thermal Surface Absorber (Thermopile)
Linearity ±1% ±0.5% ±1% ±0.5%
Resolutionc 100 µW 100 µW 200 µW 100 µW
Measurement
Uncertaintyd
±3% @ 1064 nm
±5% @ 190 nm - 2940 nm
±3% @ 1064 nm
±5% @ 250 nm - 17 µm
±3% @ 1064 nm
±5% @ 190 nm - 1064 nm
±3% @ 1064 nm
±5% @ 250 nm - 17 µm
Response Timee 1.5 s
(<1 s from 0 to 90%)
0.6 s 2.7 s
(<1 s from 0 to 90%)
0.6 s
Cooling Convection (Passive)
Housing Dimensions
(Without Adapter)
40.6 mm x 40.6 mm x 15 mm
(1.60" x 1.60" x 0.59")
50.8 mm x 50.8 mm x 35.0 mm
(2.00" x 2.00" x 1.38")
55 mm x 55 mm x 54.5 mm
(2.17" x 2.17" x 2.15")
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 Tap
(Post Not Included)
Universal 8-32 / M4 Taps
(Post Not Included)
M6 Threaded Taps, Includes Ø1/2" Post, 75 mm Long Universal 8-32 / M4 Taps
(Post Not Included)
30 mm Cage Mounting Three 4-40 Tapped Holes - Four 4-40 Tapped Holes -
Aperture Threads Internal M14 x 1 Internal SM1 - Internal SM1
Removable Heatsink - Yes - Yes
Accessories Externally SM1-Threaded Adapter Externally SM1-Threaded Adapter Externally SM1-Threaded Adapter Externally SM1-Threaded Adapter
Compatible Consoles PM400, PM200, PM100D, PM100USB, PM100A, and PM320E
  • For complete specifications, please see the Specs tab here.
  • Two Minute Maximum Exposure Time
  • Measurement taken with the PM100D console for the S305C and S310C and with the PM400 for the S415C and S425C. 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). 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 here for additional information.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
S305C Support Documentation
S305CCustomer Inspired!Thermal Power Sensor Head, Surface Absorber, 0.19 - 25 µm, 5 W, Ø10 mm
$740.52
Today
S415C Support Documentation
S415CNEW!Thermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 10 W, Ø15 mm
$726.00
Today
S310C Support Documentation
S310CThermal Power Sensor Head, Surface Absorber, 0.19 - 25 µm, 10 W, Ø20 mm
$740.52
Today
S425C Support Documentation
S425CNEW!Thermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 10 W, Ø25.4 mm
$792.00
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.
  • S314C and S322C Have 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
  • All Include a Thermistor Used to Monitor Temperature of Sensor Head
  • 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 here). 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.


Item #a S314C S350C S425C-L S322C
Sensor Image
(Click Image to Enlarge)
S314C S350C S425C-L S322C
Wavelength Range 250 nm - 11 µm 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) 10 mW - 40 W (60 Wb) 2 mW - 50 W (75 Wb) 100 mW - 200 W (250 Wb)
Input Aperture Size Ø25 mm Ø40 mm Ø25.4 mm Ø25 mm
Active Detector Area
Ø25 mm Ø40 mm Ø27 mm Ø25 mm
Max Optical Power Density 2 kW/cm² (Avg.) 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 1 mW 100 µW 5 mW
Measurement Uncertaintyd ±3% @ 1064 nm
±5% @ 250 nm - 2940 nm
±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 4 s
(<1 s from 0 to 90%)
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)
100.0 mm x 100.0 mm x 54.2 mm
(3.94" x 3.94" x 2.13")
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
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 - - Four 4-40 Tapped Holes
Aperture Threads - - Internal SM1 -
Removable Heatsink - - Yes -
Accessories Externally SM1-Threaded Adapter - Externally SM1-Threaded Adapter Externally SM1-Threaded Adapter
Compatible Consoles PM400, PM200, PM100D, PM100USB, PM100A, and PM320E
  • 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 wase 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 S314C, 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 here for additional information.
  • 12 VDC power supply is included.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
S314C Support Documentation
S314CThermal Power Sensor Head, Surface Absorber, 0.25 - 11 µm, 40 W, Ø25 mm
$916.98
Today
S350C Support Documentation
S350CThermal Power Sensor Head, Surface Absorber, 0.19 - 1.1 µm and 10.6 µm, 40 W, Ø40 mm
$1,095.48
3-5 Days
S425C-L Support Documentation
S425C-LNEW!Thermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 50 W, Ø25.4 mm
$858.00
Today
S322C Support Documentation
S322CThermal Power Sensor Head, Surface Absorber, 0.25 - 11 µm, 200 W, Ø25 mm, Fan Cooled
$1,356.60
3-5 Days

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 PM400, PM200, PM100D, PM100A, PM100USB, and PM320E
  • 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 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 here 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.

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.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
S370C Support Documentation
S370CThermal Power Sensor Head, Volume Absorber, 0.4 - 5.2 µm, 10 W, Ø25 mm
$1,137.30
Today
S470C Support Documentation
S470CThermal Power Sensor Head, Volume Absorber, 0.25 - 10.6 µm, 0.1mW - 5W, Ø15 mm
$1,157.70
Today

Pyroelectric Energy Sensors

ES220C with a 30 mm Cage System
Click to Enlarge

ES220C Sensor Mounted in a 30 mm Cage System
  • For General Purpose and High Energy Optical Pulse Measurements
  • Black Broadband Coating with Flat Response Over a Wide Wavelength Range
  • Ceramic Coating with High Damage Thresholds for High-Energy-Density Lasers
  • Sensor Areas from Ø11 mm to Ø45 mm
  • BNC Connector for Oscilloscope Use
  • C-Series Connector Adapter for Use with Compatible Thorlabs Consoles (See Table Below)
  • See the Full Web Presentation for More Information

These 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 black broadband or ceramic coating is used for low or high power measurements, respectively. Large sensor areas from Ø11 mm - Ø45 mm allow easy alignment. The energy sensors features BNC connectors for use with an oscilloscope, as well as standard power meter connectors which contain NIST and PTB-traceable calibration data.

Item #a ES111C ES120C ES145C ES220C ES245C
Sensor Image
(Click the Image to Enlarge)
ES111C ES120C ES145C ES220C ES245C
Aperture Size Ø11 mm Ø20 mm Ø45 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 500 µJ - 3 J 1 mJ - 15 J
Detector Type Pyroelectric Energy Sensor with Black Broadband Coating Pyroelectric Energy Sensor with Ceramic Coating
Resolution 100 nJ 1 µJ 1 µJ 25 µJ 50 µJ
Linearity ±1%
Measurement Uncertainty ±5% @ 0.185 - 25 µm
Housing Dimensions Ø36 mm x 16 mm Ø50 mm x 18 mm Ø75 mm x 21 mm Ø50 mm x 18 mm Ø75 mm x 21 mm
Cable Length 1.5 m
Post Mounting 8-32 Mounting Thread, 8-32 and M4 Insulating Adapters Included
Cage Mounting N/A Four 4-40 Taps for
30 mm Cage Systems
N/A Four 4-40 Taps for
30 mm Cage Systems
N/A
Compatible Consoles PM400, PM200, PM100D, PM100USB, and PM320E
  • For complete specifications, please see the Specs tab here.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
ES111C Support Documentation
ES111CPyroelectric Energy Sensor, Broadband Coating, 0.185 - 25 µm, 150 mJ
$1,293.36
Today
ES120C Support Documentation
ES120CPyroelectric Energy Sensor, Broadband Coating, 0.185 - 25 µm, 500 mJ
$1,346.40
Today
ES145C Support Documentation
ES145CPyroelectric Energy Sensor, Broadband Coating, 0.185 - 25 µm, 2 J
$1,554.48
Today
ES220C Support Documentation
ES220CPyroelectric Energy Sensor, Ceramic Coating, 0.185 - 25 µm, 3 J
$1,616.70
Today
ES245C Support Documentation
ES245CPyroelectric Energy Sensor, Ceramic Coating, 0.185 - 25 µm, 15 J
$1,877.82
Today

Recalibration Service for Photodiode Power Sensors

Calibration Service Item # Corresponding Power Meter Sensors
CAL1 S120VC, S120C, S121C, S170C, S140C, S142C, S150C, S151C
CAL2 S122C, S144C, S145C, S146C, S154C, S155C
CAL-S130 S130VC, S130C
CAL-S132 S132C
CAL4 S148C, S180C

Thorlabs offers Calibration Services for our photodiode optical power sensors. To ensure accurate measurements, we recommend recalibrating the sensors annually. Recalibration of the console is included with the recalibration of a sensor. See the table to the right for details.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
CAL1 Support Documentation
CAL1Recalibration Service for Si Power Meter Sensors Except S130 Series
Part Number:  Serial Number:
$143.82
Lead Time
CAL2 Support Documentation
CAL2Recalibration Service for Ge & InGaAs Power Meter Sensors Except S132 Series and S148C
Part Number:  Serial Number:
$162.18
Lead Time
CAL-S130 Support Documentation
CAL-S130Recalibration Service for Si Power Meter Sensors for S130 Series and PM160
Part Number:  Serial Number:
$167.28
Lead Time
CAL-S132 Support Documentation
CAL-S132Recalibration Service for Ge Power Meter Sensors for S132 Series only
Part Number:  Serial Number:
$177.48
Lead Time
CAL4 Support Documentation
CAL4Recalibration Service for MCT and Extended InGaAs Mid-IR Power Sensors (S148C and S180C)
Part Number:  Serial Number:
$289.68
Lead Time

* A member of our team will contact you with an RMA Number and return instructions. Please do not ship your item prior to being contacted.

Recalibration Service for Thermal Power Sensors

Compatible Thermal Sensors
S175C S401C S302C S405C S305C S415C S310C S425C S314C S350C S425C-L S322C S370C S470C

Thorlabs offers Calibration Services for our thermal optical power sensors. To ensure accurate measurements, we recommend recalibrating the sensors annually. When returning a sensor for calibration, please also be sure to include the console used with it, as they will be calibrated together.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
CAL-S200 Support Documentation
CAL-S200Recalibration Service for Thermal Sensors
Part Number:  Serial Number:
$182.58
Lead Time

* A member of our team will contact you with an RMA Number and return instructions. Please do not ship your item prior to being contacted.

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