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PbS-CAL Spectral Responsivity Standard (1500-3000nm)

  • PBS_CAL Lead Sulphide Photodiode Detector Chip
  • PbS-CAL Spectral Responsivity reference Standard 1500-3000nm

Calibrated in our dedicated laboratory, in photoconductive mode, with respect to standards calibrated by the Physicalish Technische Bundesanstalt (PTB, Germany), a calibration range of 1500-3000nm is on offer.

Housing a 3x3mm active area lead sulphide photodiode, the PbS-CAL delivers enhanced linearity and exceptionally low noise. Operated in the photoconductive mode with a chopped input, the signal generated by this detector is best measured in using a trans-impedance amplifier such as the Bentham 477 followed by the 496 DSP lock-in amplifier. Control of the thermo-electric element is assured by the CPS1/CPS1M.

Core benefits


  • Spectral responsivity standard, 1500-3000nm (A.W-1)
  • General purpose lead sulphide photodiode
  • High sensitivity 3x3 mm diameter active area
  • Calibration performed with respect to the Physicalish Technische Bundesanstalt (PTB, Germany)
  • Compatible with the entire range of Bentham monochromators and accessories
  • Recommended for use with the 400 Series of detection electronics


MaterialLead sulphide
Active area3x3 mm
Spectral response range1000-3000nm
Operating modePhotoconductive
Shunt resistance (typ.)0.7MΩ
Peak wavelength (typ.)2600nm
NEP<5 x 10-12 W.Hz-1/2
Maximum cooler current1A
Recommended chopping frequency175/ 225 Hz
Temperature controlChange to Via CPS1/ CPS1M Peltier Cooler Controller
Operating temperature-10°C


Measurement typeSpectral responsivity
Wavelength range1500-3000nm
Wavelength interval5nm
TraceabilityPhysicalish Technische Bundesanstalt (PTB, Germany)
Calibration frequencyThree yearly recommended


Max. operating temperature-20 to +60°C
CompatibilityFour M3 clearance holes (Bentham slit pattern)


CALIBRATION-DH-PBS-TESpectral responsivity calibration 1500-3000nm

Ordering Information

DH_PBS_TELead sulphide spectral responsivity reference standard
CALIBRATION-DH-PBS-TESpectral responsivity calibration 1500-3000nm

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