The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 1989
Filed:
Mar. 01, 1988
Masato Maeda, Tokyo, JP;
Yokogawa Electric Corporation, Tokyo, JP;
Abstract
An apparatus having a combustible gas detecting sensor and an O.sub.2 gas detecting sensor which are provided separately of each other, the combustible gas detecting sensor made of zirconia solid electrolyte and having an electrode exposed to reference gas and a molybdenum disilicide electrode exposed to gas to be measured, wherein the combustible gas detecting sensor is heated to an operating temperature which is different from the heating temperature of the O.sub.2 detecting sensor, thereby to measure the concentration of a wide range of combustible gas in the gas to be measured which is in an O.sub.2 gas rich state, by calculation based on the respective outputs of the two sensors.