P/N 203794

Portable laser power meter for up to 50 W.

    • 19 mm Ø
    • 55 mm Ø
    • 10 x 10 mm
    • H - Standard (up to 250 W)
    • W - Very high power density
    • H - Standard (up to 10 kW)
    • H - Standard (up to 3 kW)
    • H - Standard (up to 500 W)
    • H - Standard (up to 6 kW)
    • Silicon (up to 800 mW)
    • Power
    • Power and Energy
    • Energy

Traceable calibration:

Logo nist

Product family key features


This mid to high power handheld probe is so compact it fits in your pocket!


The touch screen color LCD allows for a friendly user interface. You can make a measurement with just the touch of a button!

User Settable

You can set the wavelength, brightness and screen orientation to adapt to your application.

Data Logging

Save your data to the internal memory and then transfer it to your PC over the USB connection.

From Low to High Powers

Thanks to a low noise level and high damage threshold, the PRONTO can measure powers from 1 W to 50 W.

Fully Calibrated

The PRONTO-50-W5 comes fully calibrated: every wavelength between 248 nm and 2.5 μm.

Hands-Free Operation

Place it on a flat surface or use one of the 2 threaded holes that we have integrated in the casing for safe use with optical stands.

Compatible stand



    USB cable for MAESTRO, U-LINK (USB), and PRONTO.

  • Calibration certificate

  • Transport case

  • Personal wavelength correctionTM Certificate

Measurement capabilities

  • Maximum average power

    50 W
  • Minimum average power

    0.5 W
  • Noise equivalent power

    4 mW
  • Spectral range1

    0.193 - 10 μm
  • Power calibration uncertainty

    ±3 %
  • Exposure time

    5 s
    • 1. For the calibrated spectral range, see the user manual.

Damage thresholds

  • Maximum average power density1

    100 kW/cm²
  • Maximum energy density2

    1.1 J/cm²
  • Maximum allowable casing temperature

    65 °C
    • 1. At 1064 nm, 10 W CW. May vary with wavelength and average power.
    • 2. At 1064 nm, 7 ns, 10 Hz. May vary with wavelength and pulse width.

Controller and GUI specifications

  • Battery type

    Rechargeable Li-ion
  • Battery life

    17 hours or 4,200 measurements (with brightness set at 25%)
  • Display resolution

    1 mW
  • Display size

    28.0 x 35.0 mm (128 x 160 pixels)
  • Display type

    Touch Screen Color LCD
  • Backlight

  • Internet upgrades via

  • Data storage

    50,000 pts
  • Battery recharge via


Physical characteristics

  • Aperture diameter

    19 mm
  • Absorber

  • Dimensions

    59.0W x 181.4L x 17.0D
  • Weight

    0.21 kg
  • Mounting holes

    2 x 8-32


Measure extremely high average power density lasers with the W absorber

The W absorber can handle tightly focused beams thanks to its extremely high average power density damage threshold of 100 kW/cm2. It measures from UV to IR but is not suitable for CO2 laser wavelengths.

Customers enjoy:

  • Ideal for UV lasers and tightly focused beams
  • Very low risk of damaging the equipment






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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