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Catalsimeter with time measuring circuitry for determining reactant concentration level

  • US 4,015,121 A
  • Filed: 07/15/1975
  • Issued: 03/29/1977
  • Est. Priority Date: 07/11/1974
  • Status: Expired due to Term
First Claim
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1. A circuit for electronically measuring and displaying a readout of elapsed time for a gas-trapping object saturated with a medium containing a first reactant to buoyantly rise within and break the surface of a fluid containing a second reactant at a predetermined concentration in a container due to the reaction of said first and second reactants to produce a gas following said gas-trapping object breaking said surface and sinking in the fluid, said circuit comprising:

  • a. photo-detector means for producing a start pulse when said gas-trapping object breaks said surface to sink in said fluid and a stop pulse when said gas-trapping object buoyantly rises and again breaks the surface of said fluid;

    b. clock means for displaying said elapsed time between said start pulse and said stop pulse, said elapsed time being proportional to the concentration of said first reactant in said medium; and

    c. means for electrically connecting said clock means and said photo-detector means, said electrically connecting means including means for passing said stop pulse only if said stop pulse should be produced after a predetermined time period following said production of said start pulse.

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