Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2002 · 20 citations · 5 references
EngineeringElectrical EngineeringMaterials ScienceOptoelectronicsPhotonicsSensorsGas SensorsOptical DetectorsOptical SensingOptical SensorsOptoelectronic DevicesPhotodetectorsDetectorsGas AbsorptionGas DetectionGas Detection LimitsGas Detection TechnologyGas SensingPower ConsumptionSemiconductor Gas Sensors
Recently developed mid-IR LED non-dispersive gas analyzers can replace conventional infrared gas monitors. The advantages of novel analyzers are compact size, fast response and low power consumption. InAsSb(P)- and InGaAs(Sb)-based LEDs developed and manufactured at Ioffe Physico-Technical Institute suit for optical gas sensing well because of narrow emission band and the possibility of making LED emission peak spectrally matched with the gas absorption maximum. We present estimations of gas detection limits for LED based optical sensors, sensor head constructions and some experimental results for CO2 and CH4 detectors based on LED-PbSe photoresistor and LED - InAs photodiode optopairs.
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