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Total Spectral Radiant Flux Standard (350-2000nm)

  • TSRF QTH total spectral radiant flux calibrator 350-2000nm

Calibrated in our dedicated laboratory with respect to standards calibrated by the Physicalish Technische Bundesanstalt (PTB, Germany), a calibration range of 380-780nm is offered.

Fitted with a grit-blasted 250W QTH lamp, stable lamp operation can be ensured by employing the lamp alongside the 610 precision constant current DC power supply. The TSRF standard is fitted with an E27 base and is easily adapted to integrating spheres and calibrated in the pins-up or pins-down orientation.

Core benefits


  • Open-frame spectral radiant flux calibration standard (mW-1.nm-1)
  • Calibration range 380-780nm
  • Designed for optimal performance when powered by the 610 contact current power supply
  • Calibration performed with respect to the Physicalish Technische Bundesanstalt (PTB, Germany)
  • Compatible with integrating spheres ranging from 500mm-2m diameter


Lamp typeGrit-blasted quartz halogen lamp, G6.35 base
Nominal lamp power and voltage250W, 24V
Operating current10.4A
Expected lifetime2000 hours
Peak spectral radiant flux (typ.)160 mW.nm-1 at 800nm
Total luminous flux (typ.)6547 lumens
Correlated colour temperature (typ.)3260 K
Chromaticity coordinates, CIE 1931 & 1976x = 0.4198, y = 0.3978, u' = 0.2422, v' = 0.5163


Measurement typeTotal spectral radiant flux
Wavelength range380-780nm
Wavelength interval5nm
TraceabilityPhysicalish Technische Bundesanstalt (PTB, Germany)
Calibration frequencyRecommended after 100 hours burn-time


Dimensions74L x 52W x 42H (mm)


CALIBRATION-TSRFSpectral radiant flux calibration 380-780nm (mW.nm-1)
TSRF QTH total spectral radiant flux calibrator top dimensions
TSRF calibration standard top profile
TSRF QTH total spectral radiant flux calibrator side dimensions
TSRF calibration standard side profile
TSRF QTH total spectral radiant flux calibrator front dimensions
TSRF calibration standard front profile

Ordering Information

CAL_TSRF_E27_250WTotal spectral radiant flux standard
CALIBRATION-TSRFSpectral radiant flux calibration 380-780nm (mW.nm-1)
PSU_610Current stabilised lamp power supply

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