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. 29, 1997
Filed:
Oct. 18, 1995
Applicant:
Inventor:
Lars Stormbom, Vantaa, FI;
Assignee:
Vaisala Oy, Helsinki, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73 2321 ; 73 3102 ;
Abstract
The invention relates to a method and sensor structure for measuring the concentration of nonpolar gases such as carbon dioxide. According to the method, the concentration of the nonpolar gas adsorbed/absorbed in a polymer film (2) is determined by detecting the weight of the polymer film (2). According to the invention, the dielectric coefficient of the polymer film (2) is measured, and on the basis of this, a correction is made in the concentration measurement result obtained from the weight measurement. (FIG. 1)