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:
Nov. 06, 2012
Filed:
Mar. 18, 2010
Makoto Matsuhama, Kyoto, JP;
Tomoko Seko, Kyoto, JP;
Shuji Takada, Kyoto, JP;
Hiroshi Mizutani, Kyoto, JP;
Takuji Oida, Kyoto, JP;
Masahiko Endo, Kyoto, JP;
Takuya Ido, Kyoto, JP;
Makoto Matsuhama, Kyoto, JP;
Tomoko Seko, Kyoto, JP;
Shuji Takada, Kyoto, JP;
Hiroshi Mizutani, Kyoto, JP;
Takuji Oida, Kyoto, JP;
Masahiko Endo, Kyoto, JP;
Takuya Ido, Kyoto, JP;
HORIBA, Ltd., Kyoto-shi, JP;
Abstract
The measurement sensitivity is improved by suppressing the surrounding temperature influence as much as possible, while realizing scale reduction, and by enlarging the detection signal, while reducing the production errors in enclosing a reference gas. Provided is a thermal conductivity sensor that detects thermal conductivity of a sample gas by using a Wheatstone Bridge circuit constructed in such a manner that measurement resistors that are brought into contact with the sample gas are disposed on a first side, and reference resistors that are brought into contact with a reference gas are disposed on a second side, and comparing the potential difference between connection points of the reference resistors and the measurement resistors. The measurement resistors disposed on the first side are assembled in one measurement space, and the reference resistors disposed on the second side are assembled in one reference space.