Electrochemical device

Details Electrochemical device Electrochemical device

1986-10-23

1988-09-06

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204426, 204427, G01N 2746

Patent

active

047691239

ABSTRACT:
An electrochemical device for dealing with a measurement gas in an external measurement-gas space, including an electrochemical sensing element having a pumping cell and a sensing cell. The pumping cell has a first planar solid electrolyte body, and a first and a second electrode disposed on corresponding areas of opposite surfaces of the first solid electrolyte body. The sensing cell has a second planar solid electrolyte body, and a third and a fourth electrode disposed on the second solid electrolyte body. The sensing element has an internal measurement-gas space communicating with the external measurement-gas space, so that the measurement gas is introduced into the internal measurement-gas space with a predetermined diffusion resistance. The first and third electrodes are substantially exposed to the internal measurement-gas space. A reference gas is accommodated in a reference-gas space to which the second and fourth electrodes are substantially exposed to the reference-gas space. Thus, none of the electrodes are directly exposed to the external measurement-gas space.

REFERENCES:
patent: 4304652 (1981-12-01), Chiba et al.
patent: 4384935 (1983-05-01), DeJong
patent: 4496455 (1985-01-01), Linder et al.
patent: 4502939 (1985-03-01), Holfelder et al.
patent: 4505806 (1985-03-01), Yamada
patent: 4505807 (1985-03-01), Yamada
patent: 4568443 (1986-02-01), Asayama et al.
patent: 4574627 (1986-03-01), Sakurai et al.
patent: 4579643 (1986-04-01), Mase et al.
patent: 4591421 (1986-05-01), Yamada et al.
patent: 4647364 (1987-03-01), Mase et al.

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