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:
Jun. 25, 2019
Filed:
Oct. 18, 2017
Applicant:
Ngk Insulators, Ltd., Nagoya, Aichi, JP;
Inventors:
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/20 (2006.01); F01N 11/00 (2006.01); G01N 33/00 (2006.01); G01N 27/416 (2006.01); G01N 27/419 (2006.01);
U.S. Cl.
CPC ...
F01N 11/007 (2013.01); F01N 3/2066 (2013.01); G01N 27/419 (2013.01); G01N 27/4162 (2013.01); G01N 33/0054 (2013.01); F01N 2560/021 (2013.01); F01N 2560/025 (2013.01); F01N 2560/20 (2013.01); F01N 2610/02 (2013.01); Y02A 50/246 (2018.01); Y02T 10/24 (2013.01);
Abstract
An apparatus for measuring ammonia concentration measures ammonia concentration in a target gas with a sensor element including a mixed potential cell. The apparatus for measuring ammonia concentration includes an electromotive force acquisition section, an oxygen concentration acquisition section, and an ammonia concentration derivation section. The ammonia concentration derivation section derives the ammonia concentration in the target gas from the relationship represented by formula (1):EMF=α log()−β log()+γ log()×log()+B   (1)