ACCU-CAL™ 50-LED Radiometers

For use with LED Light Curing Systems

CE Marked – Available Globally

Consistent curing requires periodic monitoring of visible energy intensity or dose. The ACCU-CAL™ 50-LED radiometer is simple to operate and offers repeatable measurement of visible light. The ACCU-CAL 50-LED can measure visible light energy emitted from lightguides (3 mm, 5 mm, and 8 mm), flood systems, and conveyors.

With a spectral sensitivity from 400 to 470 nm (blue portion of the visible spectrum), the ACCU-CAL 50-LED measures intensities from 1 mW/cm2 to 40 W/cm2. A specially designed photo sensor assembly protects the photo sensor from the high temperatures sometimes associated with today’s high-intensity spot lamps.

  • Measures range up to 40 W/cm2
  • Sensitive at measuring stray or reflected visible light (as little as 1 mW/cm2)
  • Only one calibration per year
  • Set screw locks lightguide in place
  • PTB and NIST traceable

Take advantage of the opportunity to evaluate our light curing systems for two weeks free of charge through our Try-and-Buy program.


Spectral Sensitivity: 350 to 450 nm

Intensity Range: 1 mW/cm2 to 40 W/cm2

Intensity (1 mW/cm2; to three significant digits)
Dose (1 mJ/cm2)

Calibration Period: 12 months

Operating Temperature Ranges Optometer: +5 to +40°C

Detector: 120°C continuous, Peak 200°C

Measurement Modes:
Intensity (mW/cm2)
Peak Intensity (mW/cm2)
Dose (mJ/cm2)

Light Sources:
Lightguides (3 mm, 5 mm, and 8 mm),
BlueWave® QX4™ LED Wands,
LED Flood Lamps

Power Supply: Two (2) AA batteries

Battery Life: 250 hours (automatic shutoff after 1 hour)

Sensor Dimensions:
Photo-Sensor Diameter = 9 mm
Diameter = 37 mm
Thickness = 8 mm
Cable Length = 1 M

Meter Dimensions: 145 mm (Length) x 63 mm (Width) x 30 mm (Thickness)

Radiometers & Accessories

Part # Product/Description
40505 ACCU-CAL™ 50-LED for LED Spot and Flood Units: Complete radiometer with 3 mm, 5 mm, and 8 mm lightguide adapters, lightguide simulator*, and an optical adapter for use with the BlueWave® QX4®; includes storage/carrying case
40519 ACCU-CAL™ 50-LED for LED Flood Units: Complete radiometer for LED flood and conveyor systems; includes storage/carrying case
39554 Flood to Spot Adapter Kit: Kit includes three lightguide adapters (3 mm, 5 mm, and 8 mm) and a lightguide simulator*
39556 Lightguide Adapter: Fits 3 mm ID lightguides (5 mm OD)
39557 Lightguide Adapter: Fits 5 mm ID lightguides (7 mm OD)
39558 Lightguide Adapter: Fits 8 mm ID lightguides
38408 Lightguide Simulator* (Fits all standard lightguide entrance fittings)
42218 BlueWave® QX4® Optic Adapter Upgrade Kit: This option is for customers who already own an ACCU-CAL™ 50-LED. The kit includes the optic adapter and updated software and calibration for your existing radiometer. The customer’s radiometer must be returned to Dymax for programming and calibration.

*A lightguide simulator is used to measure direct spot lamp intensity (required to calculate lightguide transmissions)


  • Simple to operate
  • Accurate measurement of curing energy
  • Can measure energy levels emitted from lightguides (3 mm, 5 mm, and 8 mm), BlueWave® QX4™ LED heads, and LED flood lamps.
  • Possesses a spectral sensitivity range of 350 – 450 nm
  • Intensity measurement from 1 mW/cm2 to 40 W/cm2
  • Ideal for measuring LED curing source energy levels
  • Specially designed photo-sensor assembly provides repeatable measurements and protection from high temperatures
ACCU-CAL 50-LED Radiometer
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