G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/61 (2006.01) G01N 21/27 (2006.01) G01N 21/35 (2006.01)
Patent
CA 2109544
INFRARED GAS ANALYZER ABSTRACT OF THE DISCLOSURE An infrared gas analyzer, which is adapted to miniaturization, includes a source for emitting infrared radiation along an optical path, a detector positioned in the optical path to detect the radiation and produce a detector output, and a sample chamber positioned in the optical path between the source and the detector for containing a sample gas including the component gas to be detected. The source includes an infrared emitter that is enclosed within a gas-impervious envelope that is void of reactive gases. The source is a conventional incandescent light source that is operated at 50% of rated voltage in a continuous, non-chopped manner, with all of the radiation being directed through the sample chamber. The source is optically coupled directly with the sample chamber in order to avoid the reflection of infrared radiation back toward the source. A control is provided for controlling the source and processing the detector output to a component gas indication. The control processes the detector output continuously to the component gas indication with a response time of less than 250 milliseconds. The control also processes the detector output to a component gas indication independent of any reference signal. -25-
Armstrong Walter I.
Black Karl H.
Borden Ladner Gervais Llp
Sensors Inc.
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