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:
Feb. 26, 1991
Filed:
Feb. 10, 1989
Ulrich Bonne, Hopkins, MN (US);
Robert J Matthys, Minneapolis, MN (US);
Gas Research Institute, Chicago, IL (US);
Abstract
A selective gas detecting apparatus for determining the concentration and type of hydrocarbon gas in a gas sample based upon absorption of infrared radiation by the gas sample, the apparatus having two infrared radiation absorption channels with the wavelengths for measurement selected so that one channel at 3.2 microns provides an output signal corresponding to approximately the sum of all hydrocarbons in the gas sample which signal is displayed as an indication of concentration of hydrocarbon gas in the gas sample, and the other channel at 3.4 microns, after essentially being ratioed to the 3.2 micron channel output provides an output signal representative of the type or average type of hydrocarbon in the gas sample, and the ratio of the signal in the two channels is displayed as an indication of the type of hydrocarbon in the gas sample.