Carbon monoxide/hydrocarbon thin film sensor

Details Carbon monoxide/hydrocarbon thin film sensor Carbon monoxide/hydrocarbon thin film sensor

1993-12-23

1997-09-23

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

73 2331, 340633, G08B 1710

Patent

active

056709498

ABSTRACT:
A ceramic sensor comprising a thin film of Cu.sub.x Mn.sub.3-x O.sub.4 is provided that quantitatively measures the partial pressure of CO and hydrocarbon gases in a flowing system. The sensor is specific to both CO and hydrocarbon gases and is negligibly affected by the presence of the common automobile exhaust vapors NO and H.sub.2 O, within the operational temperature range from about 250.degree. to 450.degree. C. The CO/hydrocarbon sensor of the invention has other applications, such as monitoring CO and hydrocarbon levels in laboratories, mines, and industrial smoke stacks, and may be used in environments up to about 700.degree. C.

REFERENCES:
patent: 4968656 (1990-11-01), Fukuda et al.
patent: 5157921 (1992-10-01), Ito et al.
patent: 5252949 (1993-10-01), Kirby et al.

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