ILT2500 CW and Pulsed/Flash Light Measurement System

ILT2500 flash meter

ILT2500 CW and Pulsed/Flash Light Measurement System

Part Number: ILT2500


  • Large, 4.3" capacitive touch screen display
  • Hand-held, ergonomic design
  • Built-in Faraday Cage for low end stability
  • Broadest measurement range in its class at 9 decades
  • Flash measurement capability with:
    • Flash App:  for 0 to 250 Hz with graphical profile
    • Beacon App:  .3 to 4 Hz for NFPA72 strobe testing with programmable flash count, integral, peak and frequency
  • Includes DataLight III comprehensive software package for both Mac and PC
  • Made in the USA


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ILT2500 Light Measurement System for Pulsed Light and Flash Applications


The ILT2500 is the most versatile light measurement system ever designed by ILT.  It combines the ease-of-use of our hand-held, portable optometer, the measurement range of a research/lab radiometer, and pulsed light profiling similar to an oscilloscope.  Together with our NIST traceable / ISO/IEC 17025:2017 Accredited calibration, and a wide array of sensors, input optics, integrating spheres, the applications for the ILT2500 abound!


ILT2500 Meter App


Meter is the standard application for steady-state light measurements and includes features such as Integrate, Hold, Zero, Min/Max/Peak, as well as data recording, all with the touch of a button.  The screen can be viewed in both portrait (tall) and landscape (wide) modes. 






ILT2500 Flash App


Flash is designed for measurement of pulsed light sources such as Xenon Pulse UV lamps.  It includes a flash count, profile of the peak of the flash, as well as the integrated dosage readings.






ILT2500 Beacon App


Beacon is for slower pulsed/flashing sources including NFPA72 strobe testing.  Measure from .3 to 4 Hz. 








ILT2500 Home Screen


The Home Screen allows users to select the application or program to run.  Survey allows data to be sorted by location or light source, and Light Stack has a programmable color changing display (red/yellow/green) and sound alert for quick troubleshooting. 







ILT2500 Trend App








Trend has all the same features of Meter, however the numerical display is greatly reduced in size to allow for a large graph.  The graph can be programmed as a line or bar chart, and is also available in portrait or landscape orientations. 



Technical Specifications

ILT2500 with detectors
  • 5 pA - 1mA current - 9 decades of light intensity measurements
  • 5V reverse bias for phototubes
  • Automatic ranging and averaging
  • 4 GB internal memory
  • 0 - 40 degree C operating temp
  • USB:  Micro for data download
  • USB:  Mini for charging and Datalight III PC & Mac light measurement software
  • Dimensions:  1 3/5" x 3"  x 6"  (H x W x L)
  • Detector/Sensor connector:  15 pin connector
  • CE certified:  No RF noise