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. 27, 2011
Filed:
Nov. 10, 2004
Kiyoshi Sagawa, Tokyo, JP;
Shinichi Harima, Daisen, JP;
Kazuo Onaga, Osaka, JP;
Junko Yanagitani, Itami, JP;
Osamu Inazawa, Itami, JP;
Kiyoshi Sagawa, Tokyo, JP;
Shinichi Harima, Daisen, JP;
Kazuo Onaga, Osaka, JP;
Junko Yanagitani, Itami, JP;
Osamu Inazawa, Itami, JP;
Tanita Corporation, Tokyo, JP;
FIS Inc., Itami-shi, JP;
Abstract
A water quality analyzer comprises: sensor electrodesmade of different metals from each other, the electrodes in a liquid of inspecting object generating a sense voltage in proportion to the liquid's impurities concentration; an operational amplifier OPamplifying the sense voltage without inverting to provide for a CPU; a resistor Rwhose one end is connected to the electrode; and a voltage dividerapplying a voltage obtained by dividing the sense voltage by a prescribed division ratio to R's another end. The CPUcalculates input signal from OPto obtain chlorine concentration and displays the calculated result on a LCDin a measurement mode, and sets the division ratio of the dividerso that sense voltage across electrodessoaked in a liquid including prescribed concentration chloride approximately agrees with a reference voltage of prescribed concentration in a sense-voltage calibration mode.