Solid state carbon monoxide sensor

Details Solid state carbon monoxide sensor Solid state carbon monoxide sensor

1997-04-28

1999-09-07

Williams, Hezron

Measuring and testing

Gas analysis

Gas of combustion

73 2501, 73 3105, 422 88, 422 97, G01N 2712, G01N 700, B01J 2340

Patent

active

059489650

ABSTRACT:
A means for detecting carbon monoxide which utilizes an un-heated catalytic material to oxidize carbon monoxide at ambient temperatures. Because this reaction is exothermic, a thermistor in contact with the catalytic material is used as a sensing element to detect the heat evolved as carbon monoxide is oxidized to carbon dioxide at the catalyst surface, without any heaters or external heating elements for the ambient air or catalytic element material. Upon comparison to a reference thermistor, relative increases in the temperature of the sensing thermistor correspond positively with an increased concentration of carbon monoxide in the ambient medium and are thus used as an indicator of the presence of carbon monoxide.

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patent: 5629474 (1997-05-01), Williams
patent: 5635136 (1997-06-01), Glaunsinger et al.

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