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. 13, 1976
Filed:
Jun. 20, 1973
Heinz Warncke, Cologne, DT;
Bayer Aktiengesellschaft, Leverkusen, DT;
Abstract
The industrial photometer consists in principle of an optical single-beam measuring arrangement with the gas (or liquid) to be investigated flowing through the measuring cell. The detector behind the measuring cell consists of a photoelectric receiver which is connected to a working resistor with a remote-controlled voltage tap. A highly constant counter voltage is connected in series with the photovoltage. The measuring cell is filled at preselected time intervals with an absorption-free zero substance (standard substance), and the difference between the photovoltage and the constant voltage is automatically equalised to zero. After equalisation, the zero substance is again replaced by the measuring gas or liquid. The voltage difference then measured is a measure of the concentration to be determined.