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US Patent 8968660 Chemical analyzer

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Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
8968660
Patent Inventor Names
John David Petty1
John Thomas Huberts1
Stephen Charles Davis1
Date of Patent
March 3, 2015
Patent Application Number
13211943
Date Filed
August 17, 2011
Patent Citations Received
‌
US Patent 11788312 Pool and spa water quality control system and method
Patent Primary Examiner
‌
Yelena G. Gakh
Patent abstract

A chemical analyzer analyzes a sample for a target chemical. The sample and reagent are added to a measurement cell until a detectable change is observed. A reference compound, which does not take part in the reaction between the target chemical and reagent, is added to the reagent. By measuring the concentration of the reference compound, the amount of reagent used may be determined. In one embodiment, a mechanism introduces the sample, adds reagent, mixes, cleans, and flushes the measurement cell, which incorporates a longitudinal chamber having inlets for the sample and reagent and an outlet for measured sample/reagent mixtures. A detector located in or adjacent to the chamber between the inlets and outlet and a piston movable in the chamber carries seals such that movement of a piston sequentially opens the inlets and expels the fluid. The analyzer also includes a device that delivers reagent to a measurement cell.

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