Oxygen sensing element formed as laminate of thin layers on subs

Details Oxygen sensing element formed as laminate of thin layers on subs Oxygen sensing element formed as laminate of thin layers on subs

1982-02-12

1983-12-06

Kaplan, G. L.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204426, G01N 2758

Patent

active

044192134

ABSTRACT:
An oxygen sensing element of the type having a solid electrolyte oxygen concentration cell formed as a laminate of thin layers on a ceramic substrate in which a heater is embedded and end portions of lead wires are inserted. To enhance reliability of insulation between a lead wire through which heater current flows and lead wires connected to the concentration cell electrodes, the end portion of the heater lead wire is inserted into the substrate so as to make close contact with a terminal portion of the heater over substantially the entire length thereof and is completely shielded from environmental atmosphere by the substrate. Accordingly, even though a carbonaceous substance may be deposited on the substrate surface during practical use of the element, the possibility of heater current leaking of the concentration cell is obviated.

REFERENCES:
patent: 4264425 (1981-04-01), Kimura et al.
patent: 4300991 (1981-11-01), Chiba et al.
patent: 4304652 (1981-12-01), Chiba et al.

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