Detectors made of lead sulfide (PbS) and lead selenide (PbSe) function as photoresistors that detect radiation in the infrared (IR) spectral range. As a special feature, large surface area detectors up to 10 x 10 mm are available for delivery.
PbSe 1 - 5 µm
Polycrystalline PbS is a standard semiconductor detector. During a product range overhaul in 2000, the properties were significantly improved.
PbS and PbSe Detectors
Just one year after starting the production of PbSe detectors, the BX series of Cal Sensors (headquartered in Santa Rosa, CA, and meanwhile operating a second production facility in Florida) has conquered the market for many applications. Compared to previous types they not only feature an increased sensitivity but also a higher detectivity and less low frequency noise. They are mainly used in medical analysis, in exhaust measurements in the manufacturing and automotive industries, and in the measurement of dampness and hydrocarbonates.
The BXP series already reaches a high sensitivity when uncooled at room temperature. The maximum is at 3.8 µm. The D* value (l pk, 1000 Hz, 1 Hz) is usually specified with 1.8 x 1010 cm Hz1/2 W-1 (at least 1.2 x 1010). Several types are available with element sizes ranging from 1x1 to 6x6 mm² in TO5 or TO8 housing. They are tested with 35 V/mm over the detector and with a 1 MW resistor in series.
The BXT series comes with a single or double level TE cooling. With single level cooling the detector reaches an operating temperature of -25 ºC, with double level cooling even -35 or -50ºC. A wavelength with maximum sensitivity is 4 to 4.5 µm. D* values are between 2.8 and 3.5 x 1010 cm Hz1/2 W-1, the time constant is 6 or 12 µs. Detectors are available in TO8, TO37, and TO66 cans.
MIRA4 is a four-channel detector that can detect up to four different gases. In the basic configuration four narrow-band filters are integrated for the detection of CmHn, CO2, and CO. The fourth filter acts as a reference.
- PbSe Infrared Detectors (PDF, 376.3 KB)
- SELECTION GUIDE FOR PbS & PbSe Infrared Detectors (PDF, 1.1 MB)
- PbS PbSe Multicolor Detectors (PDF, 733.1 KB)
- Thermoelectric Cooling (PDF, 239.3 KB)
- PIREPLUS IR-Emitter (PDF, 639.7 KB)
- PbS-PbSe-Detectors-Packages (PDF, 351.3 KB)
- IDA Compact integrated infrared detector assembly (PDF, 349.9 KB)
- PbSe Multicolor Detector with Peltier (PDF, 675.8 KB)
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