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Method and apparatus for monitoring liquid stock in a storage tank

  • US 4,598,742 A
  • Filed: 11/04/1985
  • Issued: 07/08/1986
  • Est. Priority Date: 04/14/1983
  • Status: Expired due to Fees
First Claim
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1. In a system having a liquid storage tank, and liquid dispensers connected to said storage tank, apparatus for monitoring stock movement to and from said tank comprising:

  • a computer;

    means connecting said dispensers to said computer to continuously enter quantities of stock as it is dispensed;

    at least one fixed level indicator mounted within said tank for indicating the true stock level when the stock uppersurface traverses said indicator;

    said computer including means for calculating the level of stock at the time it passes said fixed level indicator, the calculation being based on the quantity of stock added to said tank and subtracted from said tank at the instant the level of stock passes said indicator, means connecting said indicator to said computer to trigger said calculating means; and

    means for comparing the true stock level with a calculated stock level determined to provide a measure of the variance between said true stock level and the calculated level.

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