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Solid State Carbon Monoxide SensorA 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.
Document ID
19990108571
Acquisition Source
Langley Research Center
Document Type
Other - Patent
Authors
Upchurch, Billy T. (NASA Langley Research Center Hampton, VA United States)
Wood, George M. (NASA Langley Research Center Hampton, VA United States)
Schryer, David R. (NASA Langley Research Center Hampton, VA United States)
Leighty, Bradley D. (NASA Langley Research Center Hampton, VA United States)
Oglesby, Donald M. (NASA Langley Research Center Hampton, VA United States)
Kielin, Erik J. (NASA Langley Research Center Hampton, VA United States)
Brown, Kenneth G. (NASA Langley Research Center Hampton, VA United States)
DAmbrosia, Christine M. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
August 19, 2013
Publication Date
September 7, 1999
Subject Category
Instrumentation And Photography
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-Patent-5,948,965|NASA-Case-LAR-15525-1-CU
Patent Application
US-Patent-Appl-SN-845899|US-Patent-Appl-SN-016669

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