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. 17, 1990
Filed:
Dec. 22, 1988
Dragerwerk Aktiengesellschaft, Lubeck, DE;
Abstract
The invention relates to an arrangement for measuring the concentration of gaseous and/or vaporous components of a fluid mixture by means of light absorption such as by means of an infrared absorption by utilizing a membrane which is made of a material in which the component of the fluid mixture to be measured accumulates. The membrane is transparent to the measuring radiation and is selectively permeable for the particles of the compounds to be measured. The membrane further acts on the radiation path between the light source and the detector. The arrangement is improved with respect to selectivity and the detection sensitivity. This is achieved in that the membrane is mounted in the flow path of the fluid mixture such that the flow path is subdivided into two component paths at the surfaces of the membrane.