The DH-PbSe-Te detector is a large area (3 x 3mm) thermo-electrcially cooled detector. It is partuclarly suitable for accurate spectroradiometry and general spectrometry applications over the 1µm to 5µm range.

This device requires a.c. coupled detection electronics, typically comprising optical chopper and lock-in such as the Bentham 218 and 225, and a bias power supply such as the 215.

Sandwich detectors or 'two-colour' detectors are also available. An infrared transmitting silicon detector is mounted in front of the PbSe detector extending the wavelength covered by a single package down to less than 250nm