P/N 201850

PC interface for power & energy measurement. Single-channel, USB output.


Traceable calibration:

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Product family key features

The universal meter

Reads all heads:

  • Power: thermopiles, photo detectors and pyroelectrics
  • Energy: thermopiles (in single shot mode), photo detectors and pyroelectrics

Measure fJ energy levels

Thanks to a unique digital method for suppressing the noise on the lower ranges

External trigger

Synchronize your M-LINK to your pulsed laser or digital chopper

Digital (USB) output

Connect the M-LINK module directly to your PC

Powerful LabView software

Features include:

  • Complete instrument controls: range, trigger, wavelength, etc.
  • Live display in J and J/cm2 or W and W/cm2
  • Full statistics: min, max, mean, standard deviation, RMS stability, repetition rate, etc.
  • Graphic displays: strip chart, histogram, tuning needle and more
  • Data file collection and analysis

Detector compatibility



    USB cable for : P-LINK, S-LINK-2, M-LINK, Mach series, T-Rad and QUAD-4Track.

  • Calibration certificate

Controller and GUI specifications

  • Digital display size

    Computer screen
  • Data display

    Real time, scope, averaging, statistics and digital tuning needle
  • Analog output

    0-2 V
  • External trigger

    4.5 to 10 V @ 20 mA, optically isolated
  • Serial commands via


Power meter specifications

  • Power range

    4 pW - 30 kW
  • Digital resolution

    Current Scale/3000
  • Device accuracy

    ±0.5 % full scale
  • Statistics

    Current value, max, min, average, standard deviation, RMS & PTP stability, time
  • Response time

    Current value, max, min, average, standard deviation, RMS & PTP stability, time

Energy meter specifications

  • Energy range

    30 fJ to 30 kJ
  • Digital resolution

    Current Scale/3000
  • Device accuracy

    1 % ±2 digits (<1 kHz)
  • Software trigger level

    0.1 to 99.9 %, 0.1 % resolution, default 2 %
  • Repetition rate1

    1 000 Hz
  • Real-time data transfer

    1 000 Hz with time stamp, no missing point
  • Statistics

    Current value, max, min, average, standard deviation, RMS & PTP stability, pulse #, repetition rate and average power
    • 1. Maximum repetition rate may vary with PC and detector speeds.

Physical characteristics

  • Dimensions

    106W x 34H x 147D mm
  • Weight

    0.424 kg


This PC-Based monitor is compatible with all types of detectors - including thermopiles, pyroelectrics and photo detectors - for both power and energy measurements. The device is available as a single channel unit that directly interfaces with a computer using a USB 2.0 connection. The LabView software is included and comes with all the necessary features. The M-LINK also presents a unique digital technique of suppressing the noise, thereby extending the measurement range all the way down to the fJ level.


What makes the M-LINK so universal is its compatibility with every detector type and model we make, and our smart software that recognizes the type of detector attached, and configures itself accordingly. Some of the basic software features include:

  • Live digital reading
  • Full statistics
  • Strip chart
  • Histogram
  • Analog tuning
  • Data logging


If you need to measure low power levels, from pW to mW, then we recommend one of our PH or PH-B detectors. In the software screen shown on the left, we have taken a data set working in the “stats” display mode. We have set the batch size to 100 data points in the manual reset mode. You can see the live power (138 nW) and full complement of statistics: mean, max, min, RMS and PTP stability. In the bottom left hand corner you will note that a wavelength of 300 nm is displayed. This is where you will enter the wavelength of your laser and engage the wavelength correction factor.


You can select any of our thermal detectors to measure your laser power from a few μW up to 30 kW. We used one of our most sensitive thermopile detectors, model XLP12-3S-H2, to generate the software screen shown on the left. We have selected the “scope” mode, where you can view the live power reading (0.404 W), a bar graph and a strip chart while monitoring the power. This high level screen also provides access to range, trigger, auto scale, and many other monitor functions.


Need to measure the radiant flux (watts) or irradiance (W/cm2) of a broadband source like the sun, a lamp, a temperature controlled black body and/or a mid or far-IR laser? Our broadband pyroelectric detectors of the UM-B Series would be a great choice. To make the measurement that is displayed on the left, we set up our UM9B-BL detector with M-LINK, an SDC-500 Chopper running 10 Hz and our 725 °C black body source. The M-LINK recognizes the UM9B-BL detector, sets the wavelength to 633 nm where it is calibrated and prepares it to measure the voltage square wave it generates. We have engaged the area correction as the 9 mm detector is over filled with radiation. We are therefore measuring irradiance in W/cm2.


You can select one of our many large area pyroelectric detectors of the QE Series for energy measurements ranging from 50 nJ to 250 J and from DUV to Far IR. To demonstrate this capability, we have selected our QE8SP-B-BL and the M-LINK. We are looking at the “histogram” screen, where you can continue to view the live measurement and a histogram that shows the energy distribution of your data set, along with a best-fit Gaussian curve. Note that you still have access to the instrument controls, like range, trigger, wavelength, etc.


For measurements in the fJ to μJ range, and from UV to near-IR we suggest our PE3B-Si detector. It represents the state-of-the-art in low-end energy detector technology. Take advantage of our proprietary pulse averaging, noise reduction techniques available with M-LINK. In the example shown at the right, we have captured a data set while running in the “averaging” mode. The bars represent minimum (white) and maximum (blue) energy values. The strip chart is based on the average energy value. You get to select the number of “bins” represented here. “Pulse averaging” is available in the statistics screen.


If you are trying to measure a relatively high energy (joules) single pulse (up to 300 msec long), you will select one of our thermopile power detectors (like the UP50-W9), have it calibrated in single shot mode and use the M-LINK to make the measurement. In the screen at the right, we have captured a long pulse that had a duration of a few hundred milliseconds and are displaying the energy in the “scope” screen. Using a variety of our thermopile detectors, you can measure from 12 μJ to 500 J in a single pulse.

Leverage serial commands

Use our serial commands to communicate directly with the meter without using Gentec-EO's software. You can do so using a terminal emulator software, like PuTTY, or you can just integrate them directly into your own software. All essential functions of the meter are covered by a command. Refer to the user manual of the meter for the list of all commands available.


  • Build your own software
  • Suit your unique laser application requirements
  • Automate your measurements


Traceable calibration provides the ability to trace the readings of laser output measurements to known international measurement standards determined by the National Institute of Standards and Technology (NIST). This ensures that the measurements taken by the instruments are reliable and accurate.

Benefits include:

  • Make valid comparisons of measurements taken by other instruments inside and outside your organization and over time
  • Comply with regulations or conform to industry standards
  • Avoid costly measurement mistakes in your operations
  • Improve customer confidence in your laser systems
  • Ensure laboratory experiment validity
  • Demonstrate measurement accuracy easily with the calibration certificate we provide

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