Gas detector

Details Gas detector Gas detector

1980-07-23

1982-08-10

Serwin, Ronald E.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

23232E, 338 34, 422 98, G01N 2706

Patent

active

043437680

ABSTRACT:
A gas detector of the type using an electric heater in which a substrate consists of an upper film of electrically insulating substance having a resistance to heat and a lower film of substance different from the substance of the upper film, a recess is formed below or under the upper film by removing part of the lower film, and a film of electrically conductive substance is deposited over the bridge of the upper film across the recess in the lower film, thereby providing a heating element characterized in that said heating element consists of a film of a substance having catalytic effects in the presence of a gas to be detected deposited on said electrically conductive substance or a material responsive to a gas to be detected, or consists of said electrically conductive substance having catalytic effects in the presence of a gas to be detected or a substance containing said substance having catalytic effects in the presence of a gas to be detected or a substance responsive to a gas to be detected, and said heating element is exposed to a gas to be detected.

REFERENCES:
patent: 3479257 (1969-11-01), Shaver
patent: 3901067 (1975-08-01), Boardman, Jr.
patent: 4039941 (1977-08-01), Morrison
patent: 4259292 (1981-03-01), Ichinose

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