Electrolysis: processes – compositions used therein – and methods – Electrolytic analysis or testing – For oxygen or oxygen containing compound
Patent
1998-02-26
2000-01-04
Warden, Sr., Robert J.
Electrolysis: processes, compositions used therein, and methods
Electrolytic analysis or testing
For oxygen or oxygen containing compound
205781, 204425, 204426, G01F 164, G01N 1700, G01N 2726
Patent
active
060106158
ABSTRACT:
Disclosed is a method for controlling a gas sensor comprising the steps of pumping-processing oxygen contained in a measurement gas introduced from external space into a first chamber by using a main pumping cell so that a partial pressure of oxygen in the first chamber is controlled to have a predetermined value at which a predetermined gas component as a measurement objective is not decomposable; decomposing the predetermined gas component contained in the measurement gas in a second chamber by the aid of a catalytic action and/or electrolysis by using a detecting pumping cell to pumping-process oxygen produced during the decomposition; and measuring the predetermined gas component contained in the measurement gas on the basis of a pumping current which flows during the pumping process; wherein the oxygen to be pumped out by the detecting pumping cell is pumped out toward an inner pumping electrode which is fixed to have a base electric potential (ground electric potential), of the main pumping cell. Accordingly, it is possible to facilitate miniaturization of a control circuit system of the gas sensor and reduction of the weight thereof.
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Kato et al., Thick Film Zr02 NOx Sensors, SAE Technical Paper Series, paper 960334, (Month unknown) 1996.
Hamada Yasuhiko
Kato Nobuhide
NGK Insulators Ltd.
Olsen Kaj K.
Warden, Sr. Robert J.
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