G - Physics – 01 – N
Patent
G - Physics
01
N
73/59
G01N 21/00 (2006.01)
Patent
CA 1083380
ABSTRACT OF DISCLOSURE A device as described whereby the concentration of a gas such as alcohol vapour can be measured using radiation absorption techniques in a pair of chambers. The chambers are elongated tubes, the first having a window at one end through which infra red radiation can pass with an optical reflector at the two ends of each tube so that radiation from a source and focused by an ellipsoidal reflector passes through the first tube in both directions and thence through the second. The reflected radiation leaves the second tube through a second window in the side of the tube, from where it passes to a detector. Passing the radiation in series through two or more parallel arranged chambers, conveniently located within a common housing increases the sensitivity.
292710
Adrian Werner
Borden Ladner Gervais Llp
LandOfFree
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