ACCU-CAL™ 50V Radiometers

For use with Visible Light Curing Systems

CE Marked – Available Globally

Consistent curing requires periodic monitoring of visible energy intensity or dose. The ACCU-CAL™ 50V radiometer is simple to operate and offers repeatable measurement of visible light. The ACCU-CAL 50V 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 50V 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: 400 to 470 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

Measurement Modes:
Intensity (mW/cm2 and W/cm2)
Peak Intensity (mW/cm2 and W/cm2)
Dose (J/cm2)

Light Sources: Lightguides (3 mm, 5 mm, and 8 mm)

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: 120 mm (Length) x 65 mm (Width) x 23 mm (Thickness)

Radiometers & Accessories

Part # Product/Description
40044 ACCU-CAL™ 50V for Flood Lamps and Conveyors: Complete radiometer (without lightguide adapters or lightguide simulator*); includes storage/carrying case
40043 ACCU-CAL™ 50V for Spot and Flood Lamps and Conveyors: Complete radiometer with lightguide adapters (3 mm, 5 mm, and 8 mm) and lightguide simulator*; includes storage/carrying case
39554 Flood to Spot Adapter Kit: Kit includes three lightguide adapters (3 mm, 5 mm, and 8 mm) and 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 (10 mm OD)
38408 5 mm lightguide simulator* with a standard D connection

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

Images & Diagrams


Part Number 40044 ACCU-CAL 50V for Floods & Conveyors only

PN 40044
ACCU-CAL™ 50V for floods and conveyors only.

Part Number 40043 ACCU-CAL 50V for Spots, Floods, and Conveyors

PN 40043
ACCU-CAL™ 50V for spots, floods and conveyors.

ACCU-CAL 50V Radiometer
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