IR sensors are durable against ambient temperature changes, humidity, high gas concentrations and preventive gases like hydrogen sulphide. IR sensors make reliable measurements in places where the density of flammable gas is very high or very low.
Both catalytic and infrared sensors are used for detection of flammable gases. However lifetime of IR sensors are longer than catalytic sensors. Also catalytic sensor’s calibration should be done more frequently than Infrared sensors. These parameters should be considered while choosing gas detector.
For more information about gas detectors:
– Crowcon Talking Gas Technical Documents
– Karataş, Ö. “Endüstriyel Tesislerde Patlayıcı, Yanıcı ve Zehirli Gazlar İçin Gaz Algılama Sistemleri”