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LuxCal250 Lux and Luminance Meter Calibration

The LuxCal250 provides accurate luxmeter calibration over an exceptionally wide dynamic range.

lux cal250

Comprising a light-tight enclosure housing standards of illuminance, Bentham’s LuxCal250 presents a straightforward and cost-effective calibration solution obviating requirements typical of traditional, distance-based calibration.

Designed as a high-performance, all-in-one calibration solution, the capabilities of the LuxCal250 may be extended to encompass precise luminance meter calibration with the LumiCal50, alongside representing a UKAS accredited calibration device with the LuxCal .

Based on an exceptionally stable, colour-filtered quartz tungsten halogen lamp, the output levels are varied via neutral density filters, providing a range of calibration levels. The LuxCal250 and LumiCal50 are both calibrated in our dedicated laboratory with respect to standards calibrated by Physicalish Technische Bundesanstalt (PTB, Germany).

Core benefits


  • Houses standards in light tight enclosure with easy access to position devices under test
  • Colour shifted (2856K quartz tungsten halogen (QTH) standards (CIE illuminant A)
  • Output level of the illuminance calibrator is varied via four neutral density filters, providing five calibration levels
  • Lab jack and height gauge, featuring a laser alignment aid, allow accurate positioning of device under test
  • Output level of the luminance calibrator is varied via three neutral density filters, providing four calibration levels
  • Includes high performance 610 programmable constant current power supply
  • Calibration traceable to Physicalish Technische Bundesanstalt (PTB, Germany)


  • ISO/CIE 19476:2014, Characterization of the performance of illuminance meters and luminance meters
  • CIE S 023/E:2013, Characterization of the performance of iluminance meters and luminance meters
  • Luxmeter calibration
  • Luminance meter calibration
  • UKAS accredited calibration

Reported Parameters

  • Illuminance (lx)
  • Optional Luminance (cd.m-2)


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