Polycrystalline lead sulfide detectors (PbS) detect infrared radiation in the wavelength range between 1 µm and 3.3 µm.
PbS detectors exhibit a higher sensitivity than PbSe detectors, by more than one order of magnitude; however, the time constant is longer. The IV-VI semiconductor PbS is a photodetector that reacts to incident IR radiation and changes its electrical resistance.
These detectors are used especially when large-area detectors are required because they are significantly less expensive than comparable InGaAs detectors. The typical chip size of LASER COMPONENTS’ standard detectors is 2 mm x 2 mm. Other configurations are also available upon request.
The fields of application are manifold, examples of which include:
- Temperature sensors – pyrometers
- Flame and spark detectors
- Moisture sensors
- Measurement of coatings and oil films
The standard size of detector elements in our lead sulfide series is 2 mm x 2 mm. Other sizes, as well as elements with Peltier cooling, are also available upon request.
Compared to InGaAs detectors, PbS elements, especially large-area designs, are available at a lower price and are thus still relevant.
- PbS Lead Sulfide Infrared Detectors PB25 (PDF, 85.3 KB)
- PbS Lead Sulfide Infrared TE Cooled Detector PB27 (PDF, 82.4 KB)
- PbS Lead Sulfide Infrared TE Ultimate Cooled Detector PB30 (PDF, 79.9 KB)