Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1997-02-14
1999-03-23
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
25033903, 25033904, 250343, G01N 2135
Patent
active
058863486
ABSTRACT:
An infrared gas analyzer for measuring low concentrations of a target gas, on the order of parts per million, in a sample gas is comprised of a gas sampling chamber, an infrared light source, and a power source for energizing the light source. A plurality of filters is provided to transmit infrared radiation at certain wavelengths. The wavelengths are chosen such that the effects of unwanted gases (such as water and carbon dioxide) can be removed from the final output signal. A plurality of infrared detectors are responsive to the filters for producing a plurality of electrical signals. A circuit is provided for combining the plurality of electrical signals to produce an output signal representative of the concentration of the target gas independently of other gases in the sample gas. A method of measuring low concentrations of a target gas is also disclosed.
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Denes Louis J.
Guzman Alberto M.
Lessure Harold S.
Simizu Satoru
American Intell-Sensors Corporation
Hannaher Constantine
Jiron Darren M.
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