Oxygen concentration detector

Details Oxygen concentration detector Oxygen concentration detector

1977-06-28

1979-05-01

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

204 1T, G01N 2746

Patent

active

041522320

ABSTRACT:
The present invention relates to an oxygen concentration detector to be used in a system which can simultaneously dispose of the three harmful elements in automotive emissions, i.e., unburnt hydrocarbons (unburnt HC), carbon monoxide (CO) and nitrogen oxides (NOx) through reaction with catalyst. In said detector an oxygen concentration cell comprises a solid electrolyte of a special ceramic material characterized by oxygen ion-conductivity; and the oxygen concentration of a measured gas can be analyzed by measuring the electromotive force generated through a difference in the oxygen partial pressure between the measured gas and a reference gas.

REFERENCES:
patent: 3619381 (1971-11-01), Fitterer
patent: 3904486 (1975-09-01), Faurschou et al.
patent: 3960693 (1976-06-01), Weyl et al.
patent: 4040930 (1977-08-01), Dillon

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