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Fluid tester and method of use

  • US 7,319,037 B1
  • Filed: 05/14/2002
  • Issued: 01/15/2008
  • Est. Priority Date: 05/14/2002
  • Status: Expired due to Fees
First Claim
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1. An integrated, multi-test, immersable test strip-type fluid testing device for simultaneously determining the value of each of a plurality of properties of a fluid to be tested, the fluid testing device comprising:

  • a test substrate; and

    a plurality of test sections, located on said test substrate, each of said test sections including;

    a test sub-section which exhibits a reaction color according to said value, as a result of reaction of a reagent with said fluid, said reagent being impregnated within said test sub-section prior to testing; and

    a reference section located adjacent to said test sub-section, said reference section including a plurality of different reference colors and being arranged such that each of said plurality of reference colors is situated adjacent to and in contact with said test sub-section, wherein said test sub-section substantially encompasses said entire reference section having said plurality of different reference colors, such that, when said test sub-section exhibits said reaction color in accordance with a fluid property value, said value is indicated by a matching one of said reference colors which lies against said test sub-section reaction color, so as to become substantially visually merged therewith,said device enabling fluid analysis of the test fluid by a self-contained, one-step procedure of immersion of the entire strip including both said test sub-section and said reference section, reaction during immersion and color reading of said reaction results upon retrieval from the test fluid,wherein reading of said indicated value in each test sub-section is performed by visually matching said test sub-section reaction color with said substantially visually merged one of said different reference colors due to self-alignment therebetween,such that said indicated value of each of the plurality of fluid properties can be simply read in a straight forward matching process with improved accuracy in simultaneous and immediate fashion,without requiring the physical alignment of said test sub-section reaction color with said reference colors,said indicated value of each of the plurality of multi-test fluid properties being provided in a recordable form,thereby enabling review of an entire set of said reaction results by summary inspection,wherein said plurality of multi-test fluid properties forms a group consisting essentially of pH, total hardness, nitrate, nitrite, free chlorine and copper.

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