DH_INSB Dewar-Cooled Photodiode (1-5.5μm)

  • DH_INSB detector 1-5.5μm

Housing a 3mm active area indium antimonide photodiode (1-5.5µm), the DH_INSB is operated in the photovoltaic mode. Using an optically chopped input, the signal generated by this detector is best measured in using the 477 trans-impedance pre-amplifier followed by the 496 DSP lock-in amplifier. Operation in the cryogenic mode offers ultimate sensitivity and low noise performance.

The mounting flange supplied with the DH_INSB is compatible with the entire range of Bentham monochromators and accessories.

Core benefits


  • Dewar-cooled, Indium Antimonide detector
  • 3mm diameter active area
  • 8 hour Dewar hold time
  • Operated in AC mode
  • Compatible with Bentham's entire range of monochromators and accessories
  • Suitable for free standing applications
  • Recommended for use with 400 series detection electronics


Material Indium antimonide
Active area 3mm diameter
Spectral response range 1-5.5μm
Operating mode Photovoltaic
Shunt resistance (typ.) >200kΩ
Peak wavelength (typ.) 3.8µm
NEP 5.3 x 10-13W.Hz-1/2
Field of view 60°


Connector SMA
Compatibility Interface plate with 4 x M3 clearance holes (Bentham slit pattern)
Dimensions 64L x 64W x 133H (mm)
Dewar hold time (hours) > 8 (with liquid Nitrogen)

Ordering Information

DH_INSB_3 Dewar-cooled indium antimonide photodiode

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