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:
Sep. 08, 2015
Filed:
Jun. 02, 2014
Applicant:
Sick Ag, Waldkirch, DE;
Inventors:
Assignee:
Sick AG, Waldkirch, DE;
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/01 (2006.01); G01N 21/33 (2006.01); G01N 21/35 (2014.01); G01J 3/427 (2006.01); G01N 21/31 (2006.01); G01N 21/3504 (2014.01); G01J 3/08 (2006.01); G01J 3/10 (2006.01); G01J 3/42 (2006.01);
U.S. Cl.
CPC ...
G01N 21/3151 (2013.01); G01J 3/08 (2013.01); G01J 3/10 (2013.01); G01J 3/42 (2013.01); G01J 3/427 (2013.01); G01N 21/33 (2013.01); G01N 21/3504 (2013.01); G01N 2021/317 (2013.01); G01N 2021/3155 (2013.01); G01N 2021/3513 (2013.01);
Abstract
The invention relates to a measurement apparatus for the determination of gas concentrations. The apparatus comprises two spectral channels, wherein the channels are separated by a single chopper wheel. The chopper wheel has several functions. On the transmitting side, it brings the light of the two light sources on the same measuring path, on the receiving side it associates the light to the associated receiver; it has its chopper function to use the lock-in technique; and it opens the possibility to implement an easy zero point correction.