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:
Jul. 14, 1998
Filed:
Nov. 30, 1995
Wolfgang Hartig, Waldkirch, DE;
Jurgen Kaufmann, Denzlingen, DE;
Erwin Sick GmbH Optik-Elektronik, Waldkirch/Breisgau, DE;
Abstract
A spectrometric gas measurement apparatus for the determination of the presence and/or concentration of gases in a spatial region has a spectrometric measurement head which transmits into the spatial region measurement radiation having the spectral ranges necessary for the determination of the gases. Furthermore, a reflector is provided at the spatial region which reflects the light which is passed through at least a part of the spatial region back to the measurement head where it is split up spectrally in an analyzer and then supplied to a photoreceiver arrangement. A measurement tube extending in the direction of light propagation is provided in the spatial region through which the measurement light passes. The measurement tube has a transverse throughflow opening, is closed at the end remote from the measurement head, accommodates the retro-reflector, and is also supplied at both ends of the transverse throughflow opening with flushing air which stands at a slight excess pressure relative to the spatial region. A reference tube with an audit cell is inserted in front of the measurement tube.