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Fluid metering apparatus

  • US 6,202,679 B1
  • Filed: 04/15/1999
  • Issued: 03/20/2001
  • Est. Priority Date: 12/01/1995
  • Status: Expired due to Fees
First Claim
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1. An apparatus for measuring density of a fluid flowing through a demand pipe, comprising:

  • a fluid dispensing unit including a controllable valve couplable to an inlet of the demand pipe; and

    a fluid information unit including a demand pressure sensor for sensing a demand fluid pressure of the fluid in the demand pipe, a first communication channel between the fluid information unit and the controllable valve of the fluid dispensing unit, a processor, coupled to the demand pressure sensor and the controllable valve, for controlling the controllable valve between a closed and an open position to regulate the fluid flowing through the controllable valve and configured to calculate a relative density of the fluid flowing through the controllable valve based, at least in part, on a pressure measurement signal received from the demand pressure sensor.

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