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:
Apr. 10, 1984
Filed:
Jul. 15, 1980
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
204426 ;
Abstract
A gas sensor wherein a first electrode whose surface is covered with an oxidizing catalyst, and a second electrode which is made of the same material as that of the first electrode and whose surface is exposed and can come into direct contact with a gas to-be-detected are disposed on a solid electrolyte which exhibits an oxygen ion conductivity. Since the gas sensor of this invention has the electrodes formed of the identical material, it has over a prior-art gas sensor the merits that secular changes are very little and that the operation is possible even at low temperatures. It can readily detect a combustible gas on the order of several tens p.p.m.