Oxygen sensor

Details Oxygen sensor Oxygen sensor

1991-02-07

1993-02-16

Niebling, John

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204410, 204406, 204426, G01N 2726

Patent

active

051868105

ABSTRACT:
An oxygen ion conductive solid-electrolyte plate (1) has first and second opposite surfaces. A plurality of negative electrodes (21b, 22b) and positive electrodes (21a, 22a) are formed on the first and second surfaces of the solid-electrolyte plate (1), respectively, and each of the plurality of negative electrodes (21b, 22b) is opposed to each of the plurality of positive electrodes (21a, 22a). A spacer (5 or 7) is hermetically secured to the first surface of the electrolyte plate (1) and at the same time surrounds each of the plurality of negative electrodes (21b, 22b). A sealing plate (3) is also hermetically secured to the spacer (5 or 7). A plurality of closed spaces (61, 62) are thus defined as spaces surrounded by the solid-electrolyte plate (1), spacer (5 or 7) and sealing plate (3). A plurality of windows (41, 42) are provided in the sealing plate. Each of the plurality of closed spaces (61, 62) embraces one negative electrode of the plurality of negative electrodes (21b, 22b) and one window of the plurality of windows (41, 42). Each of the plurality of closed spaces (61, 62) communicates with the external space through one of the plurality of windows (41, 42). Each of the plurality of windows (41, 42) allows oxygen molecules to diffusely flow from the environment into each of the plurality of closed spaces (61, 62) through each of the plurality of windows (41, 42).

REFERENCES:
patent: 3942104 (1976-03-01), Byrue
patent: 4668374 (1987-05-01), Bhagat et al.
patent: 4670128 (1987-06-01), Mase et al.
patent: 4728411 (1988-03-01), Mase et al.
patent: 4808293 (1989-02-01), Fukuda et al.
patent: 4824548 (1989-04-01), Iino et al.
patent: 4927517 (1990-05-01), Mizutani et al.

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