G - Physics
01
N
73/59, 340/140.1
G01N 21/00 (2006.01) G01N 21/35 (2006.01) G01N 33/00 (2006.01)
Patent
CA 1131732
ABSTRACT OF THE DISCLOSURE Apparatus for illuminating a gas or gas mixture and filtering the output thereof alternately with two filters. One filter has a passband at an absorption band of a gas to be detected. the other filter has a passband outside the absorption band.
321599
Itt Industries Inc.
Smart & Biggar
LandOfFree
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