Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample
Patent
1982-07-19
1986-08-26
Turk, Arnold
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing gas sample
73 23, 324 65R, 338 34, 338 35, 422 98, G01N 2712
Patent
active
046082328
ABSTRACT:
Gas sensor which is constructed of an electrically insulating base, electrodes formed on said base, and a gas sensitive film formed on the surface of said base at a portion where it detects a gas to be sensed, e.g., an oxygen gas. The gas sensor of the present invention is characterized in that the gas sensitive film is a thermal-sprayed film which is made of an oxide having a perovskite structure. The thermal-sprayed film has its surface formed with fine cracks to have its effective surface area increased so that the response is speeded up. Moreover, the thermal spraying process is so effected during the formation of the oxide film that an impurity to adversely affect the reliability may be avoided from being mixed.
The gas sensor may have said gas sensitive film coated with a ceramic material so that is performance may be further improved while protecting the gas sensitive film. Furthermore, it is also effective to add another sensor with the electrically insulating base being commonly used.
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patent: 4265930 (1981-05-01), Shinohara et al.
patent: 4276202 (1981-06-01), Schmidberger et al.
patent: 4359374 (1982-11-01), Sano et al.
Asahi Naotatsu
Sunano Naomasa
Hitachi , Ltd.
Turk Arnold
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