Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1991-07-23
1993-08-24
Niebling, John
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204424, 204426, G01N 27409
Patent
active
052385493
ABSTRACT:
In an oxygen concentration detector which comprises an oxygen ion-conducting solid electrolyte, a pair of electrodes, provided on both sides of the solid electrolyte, as counterposed against each other, at least one of the electrodes being exposed to a sample gas, an oxygen ion-conducting diffusion-resistant layer, provided on the electrode exposed to the sample gas and having a predetermined porosity thereby to promote the diffusion of the sample gas, the present oxygen concentration detector is characterized by an electrically insulating porous layer, made of an electrically insulating material, provided between the electrode exposed to the sample gas and the diffusion-resistant layer and having a lower porosity than that of the diffusion-resistant layer and can accurately detect an oxygen concentration of the sample gas with current-voltage characteristics free from hysteresis.
REFERENCES:
patent: 4177112 (1979-12-01), Suzuki et al.
patent: 4356065 (1982-10-01), Dietz
patent: 4402820 (1983-09-01), Sand et al.
Makino Daisuke
Naito Masataka
Shibata Masahiro
Leader William T.
Niebling John
Nippon Soken Inc.
Nippondenso Co. Ltd.
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