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:
Aug. 15, 1989
Filed:
Oct. 13, 1987
Applicant:
Inventors:
Toru Kodachi, Nagoya, JP;
Jun Usami, Aichi, JP;
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
204406 ;
Abstract
An oxygen analyzer using an oxygen sensor by which the oxygen concentration of a measuring gas can be detected. The oxygen sensor includes an oxygen pump and an oxygen concentration cell. The detecting principle is to vary the reference voltage to be compared with an output electromotive force of the oxygen concentration cell by using a predetermined relationship between the electromotive force and the pumping current, thus eliminating the need of using a reference air of which oxygen concentration is compared as a reference.