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:
Dec. 22, 2009
Filed:
Aug. 17, 2007
Applicants:
Bert Willing, Blonay, CH;
Markus Kohli, Grandson, CH;
Andreas Seifert, Denens, CH;
Inventors:
Assignee:
IR Microsystems SA, Lausanne, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/39 (2006.01); G01N 21/00 (2006.01); G01N 21/35 (2006.01);
U.S. Cl.
CPC ...
Abstract
A combined gas sensor device allowing the measuring of the concentration of a gas by tunable diode laser spectrometry as well as by resonant photo-acoustics within one housing. A laser beam used for laser spectrometry is sent across the openings of a measuring cell usually used for resonant photo-acoustic determination. Thus, both measuring principles use the same gas sensing module with a minimum of space consumption, so that the device can be produced with minimum dimensions. Further, a common opto-electronics and electronics platform can be used which reduces the overall costs of such a combined gas sensor.