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Automatic delivery/drain detection using a level monitoring system

  • US 7,298,278 B2
  • Filed: 08/09/2005
  • Issued: 11/20/2007
  • Est. Priority Date: 08/10/2004
  • Status: Expired due to Fees
First Claim
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1. A method of detecting at least one of a delivery and a drain of product in a storage tank, the method comprising the steps of:

  • monitoring at a first rate a product level in the tank;

    determining that at least one of the delivery or drain of product has begun;

    monitoring at a second rate the product level in the tank;

    determining that the at least one of the delivery or drain of product has ended; and

    transmitting information related to an amount of product delivered or drained during the at least one of the delivery or drain of the product; and

    wherein the step of determining that at least one of a delivery or drain of product has begun comprises the steps of;

    reading a first product level at the first rate before the at least one of the delivery or drain of product has begun;

    reading a second product level at the first rate;

    determining a difference between the first product level and the second product level; and

    indicating at least one of a delivery or drain of product has begun when the difference exceeds a threshold level of change.

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