Gas detection
Deviations from Beers Law in NDIR Gas Sensors
Jun 15 2009
Author: Alan Doncaster on behalf of Clairair Ltd
Non Dispersive InfraRed sensors function by monitoring the absorption of infrared radiation in the wavelength range affected by target gases, typically in the 3-5 micron wavelength range. Aliphatic hydrocarbons absorb in this region due to the fundamental C-H bond stretches and carbon dioxide absorbs in this region due to the fundamental asymmetric O=C=O stretch.
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