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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.:

US 12546742 B1

PDFFull Text
Date of Patent:
Feb. 10, 2026

Filed:

Oct. 18, 2023

Gas sensor

Applicant:

Ngk Insulators, Ltd., Nagoya, JP;

Inventors:

Yusuke Watanabe, Nagoya, JP;

Daichi Ichikawa, Nagoya, JP;

Assignee:

NGK INSULATORS, LTD., Nagoya, JP;

Attorney:

MATTINGLY & MALUR, PC

Primary Examiner:

Freddie Kirkland, III

Int. Cl.
CPC ...
G01N 27/409 (2006.01); G01N 27/12 (2006.01); G01N 27/30 (2006.01); G01N 27/41 (2006.01); G01N 27/419 (2006.01); G01N 33/00 (2006.01); G01N 27/406 (2006.01);
U.S. Cl.
CPC ...
G01N 27/409 (2013.01); G01N 27/12 (2013.01); G01N 27/301 (2013.01); G01N 27/41 (2013.01); G01N 27/419 (2013.01); G01N 33/0037 (2013.01); G01N 27/4067 (2013.01);
Abstract

A gas sensor includes a sensor element including an element body, a measurement pump cell including an inner measurement electrode, an adjustment pump cell including an inner adjustment electrode and a reference electrode, a control apparatus that performs an adjustment pump control process of adjusting the oxygen concentration in the oxygen concentration adjustment chamber so that an adjustment voltage reaches an adjustment voltage target value, and a measurement pump control process of pumping out oxygen in the measurement chamber so that a measurement voltage reaches a measurement voltage target value. The control apparatus detects the specific gas concentration in the measurement-object gas based on a measurement pump current, and the control apparatus detects a water concentration in the measurement-object gas based on a change in the measurement pump current when at least one of the adjustment voltage target value or the measurement voltage target value is changed.

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