The passive infrared analysis gas sensors and mounted for multiple detector channels

摘要

Invention patent: b "passive infrared analysis gas sensors and mounted for multiple detector channels" d .The gas detector for passive infrared source (33) that uses a passive infrared source, and the space between the mounting detector (3), 79) and the source and the sample chamber.The gas detector (33) includes an infrared detector assembly (3, 79) to produce a first, a second and a third outputs.The first output being indicative of the radiation received in a first spectral range non neutral which is absorbable by a pre selected gas to be detected.The second output being indicative of the radiation received in a first spectral range neutral from the passive infrared source.And the third output being indicative of the radiation received in a second spectral range neutral from the passive infrared source.The signal processing means with the three outputs to determine the concentration of gas to be monitored.Additional detectors can be added to the assembly of detector to detect the radiation in the spectral bands characteristics of additional gas.