Nohmi Bosai Kogyo Co., Ltd.

Takashi Handa

Yoshiaki Okayama

Koichi Endo

An element for selectively sensing carbon monoxide which is capable of sensing a lower concentration of CO in a quicker response time at ordinary temperatures without the need of heating the element with better SN and low temperature dependence.

Carbon monoxide sensing element and method of making same

Method of detecting carbon monoxide gas at temperatures of 100.degree. C. or less by using a detecting element containing stannic oxide as the main component, which element is prepared by mixing stannic oxide, antimony trioxide and platinum in atomic ratios of Sb/Sn = at least 0.005, Pt/Sn = at least 0.004 and Sb/Pt = at least 0.005, and sintering said mixture at a temperature of at least 625.degree. C.

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Kamakura, Japan

Takashi Handa