Water-proof type oxygen sensor

Details Water-proof type oxygen sensor Water-proof type oxygen sensor

1990-05-02

1991-08-06

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204426, 204427, 204429, G01N 27407

Patent

active

050375261

ABSTRACT:
A water-proof type oxygen sensor including a sensor element having inner and outer electrodes at inner and outer surfaces, respectively; a metallic cap for housing the sensor element; a gas-tight sealing member provided in the cap for isolating the exhaust gases from the air; communicating openings provided in the cap for communicating a space inside the cap with the air; and a communicating member arranged around the outer periphery of the communicating openings and having gas permeability and water-repellent property. The inner and outer electrodes are adapted to contact with air and exhaust gases. The communicating member is cylindrical and is fixed to the metallic cap through a metallic fixing member having a coefficient of thermal expansion almost equal to that of the metallic cap.

REFERENCES:
patent: 4123131 (1978-10-01), Pearce et al.
patent: 4717464 (1988-01-01), Oshima et al.
patent: 4786397 (1988-11-01), Barbieri et al.
patent: 4786399 (1988-11-01), Wertheimer et al.
patent: 4818364 (1989-04-01), Weber et al.
patent: 4883643 (1989-11-01), Nishio et al.

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