Detection of CO{HD 2 {B in a hyperbaric gaseous environment

摘要

An infrared source emits radiaiton which is transmitted through a chamber containing a mixed sample of gas. The gas is subjected to density modulation by a piston which compresses and expands the gas in the chamber in a precisely controlled manner. An infrared detector measures the amount of radiation passing through the gas so that the gas concentration is determined by the fractional change in radiation at the detector. The invention also includes a specific radiation detector for detecting the radiation and monitoring the total light flux reaching the detector.