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:
Jan. 17, 2023
Filed:
Jul. 20, 2021
Drägerwerk Ag & Co. Kgaa, Lübeck, DE;
Ralf Buchtal, Lübeck, DE;
Gerd Peter, Lübeck, DE;
Bernd-Michael Dicks, Lübeck, DE;
Björn Spilker, Lübeck, DE;
Robert Jahns, Lübeck, DE;
Martin Kroh, Lübeck, DE;
Drägerwerk AG & Co. KGaA, Lübeck, DE;
Abstract
A photoacoustic sensor () is capable of detecting a predefined target gas in an area (Um). A process is capable of detecting the target gas with the use of such a sensor (). A sample chamber () holds a gas sample (Gp) to be tested. Electromagnetic waves (eW) from a radiation source () pass through the sample chamber () and the detection chamber (). The waves elicit in the detection chamber () an acoustic effect, which is measured by an acoustic sensor (). The acoustic effect is correlated with the concentration of the target gas in the sample chamber (). The detection chamber () is fluid-tightly sealed, is free from target gas and is filled with a replacement gas (Eg). The transmission of the replacement gas (Eg) has a spectral response similar to that of the transmission of the target gas in a predefined target gas wavelength range.