Oxygen sensor

Details Oxygen sensor Oxygen sensor

G - Physics

01

N

324/25

G01N 27/30 (2006.01)

Patent

CA 1151729

ABSTRACT OF THE DISCLOSURE An oxygen sensor for detecting an oxygen concentration in a gas under test such as exhaust gas from an internal combustion engine of an automobile, The oxygen sensor comprises an oxygen concentration sensing ele- ment made of an oxygen ion conductive metal oxide which produces an electro- motive force in accordance with a difference between an oxygen concentration in the gas under test and an oxygen concentration in a reference gas, a porous layer of refractory metal oxide formed on a surface of the oxygen concentration sensing element which is to be exposed to the gas under test, and an electrode formed thereon. The peel-off of the electrode is prevented and a high- response oxygen sensor is provided, These sensors find use in fuel control systems in which the air : fuel ratio in gas for supply to an internal combus- tion engine is controlled at a constant value, These sensors exhibit a high response and better durability than the known sensors,

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