Ngk Insulators, Inc.

Junichiro Mizusaki

Takao Murase

Minoru Yokota

In a CO gas sensor composed of a CO gas sensing electrode,being made of Au or an Au alloy and a reference electrode,electrically connected to at least part of a surface of a solid electrolyte having an oxygen ion transfer property, which is superior in CO gas selectivity, in particular, reducing the affect of the co-existing oxygen to CO, and which works with a high precision at a high temperature, and in a CO gas measuring device using the gas sensor, the gas sensor being capable of determining a CO gas concentration by measuring a electromotive force change due to adsorption/oxidization of the carbon monoxide gas in the sensing electrode,when a constant current is caused to flow between the reference electrode,and the sensing electrode,or a current value caused by the oxidizing reaction of the carbon monoxide gas in the sensing electrode when a voltage is kept constant between the reference electrode,and the sensing electrode

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Sebdai, Japan

Junichiro Mizusaki