Gas sensing element

Details Gas sensing element Gas sensing element

1987-03-25

1990-02-20

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204408, 204425, 204427, G01N 2746

Patent

active

049024000

ABSTRACT:
A gas sensing element having a co-fired laminar structure including an electrochemical cell having a planar solid electrolyte body, and at least two electrodes disposed on the planar solid electrolyte body. The sensing element further includes two generally planar heaters which are formed on opposite sides of the electrochemical cell, respectively, and which are spaced apart from each other in a direction perpendicular to the planar solid electrolyte body, and a generally planar thermosensitive portion formed as an integral part of the laminar structure, for detecting a temperature of the laminar structure in the neighborhood of at least one of the electrodes of the electrochemical cell. The thermosensitive portion may partially define a diffusion chamber into which a measurement gas in an external space is introduced under a predetermined diffusion resistance, so that one of the electrodes is exposed to the introduced measurement gas.

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patent: 4722779 (1988-02-01), Yamada et al.
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Laid Open Publication No. 58-124943, (Japanese Patent Application No. 57-6846).

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