Gas sensor and method of detecting gas concentration

Details Gas sensor and method of detecting gas concentration Gas sensor and method of detecting gas concentration

2006-02-07

2006-02-07

Olsen, Kaj (Department: 1753)

Electrolysis: processes, compositions used therein, and methods

Electrolytic analysis or testing

For organic compound

C205S784500, C204S425000, C204S427000

Reexamination Certificate

active

06994780

ABSTRACT:
A gas sensor includes a measurement gas chamber into which a measurement gas is introduced. An oxygen pumping cell adjusts an oxygen concentration in the measurement gas chamber. An oxygen monitor cell has a monitor electrode exposed in the measurement gas chamber. The monitor electrode has an oxidizing activity with respect to a specific component of the measurement gas. A sensor cell has a sensor electrode exposed in the measurement gas chamber. The sensor electrode has an oxidizing activity with respect to the specific component of the measurement gas which is lower than the oxidizing activity of the monitor electrode. An oxygen-ion current in the oxygen monitor cell is detected. An oxygen-ion current in the sensor cell is detected. A concentration of the specific component of the measurement gas is detected from a relation between the detected oxygen-ion currents in the oxygen monitor cell and the sensor cell.

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