INFRAROT-GASDETEKTOR.

摘要

PCT No. PCT/CA90/00288 Sec. 371 Date Jun. 26, 1991 Sec. 102(e) Date Jun. 26, 1991 PCT Filed Sep. 10, 1990 PCT Pub. No. WO91/05240 PCT Pub. Date Apr. 18, 1991.A nondispersive gas analyzer for use in monitoring the concentration of one or more gases, comprises a body having a cavity having an elliptical reflecting surface, defining a first focus and a second focus, for transmitting radiation between the focuses, a chamber (2) for holding a sample gas to be analyzed, one of the focuses being located within the sample chamber, a chamber (4) for holding an inert gas and a chamber (3) for holding an analyte gas, a radiation source (24) disposed at one of the focuses, and a radiation detector (26, 27) associated with each of the inert and analyte gas chambers for detecting the radiation passing through the sample gas and the inert gas and the radiation passing through the sample gas and the analyte gas located at the other of the focuses.