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Liquid metering system

  • US 20050005710A1
  • Filed: 02/26/2004
  • Published: 01/13/2005
  • Est. Priority Date: 05/15/2002
  • Status: Abandoned Application
First Claim
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1. A system for monitoring fluid flow through a passageway comprising:

  • a) a heater that heats a portion of the fluid in the passageway;

    b) a light source that generates a beam of light that illuminates the fluid in the passageway; and

    c) a light detector positioned to receive a portion of the beam, wherein the detector measures a change in the intensity of the beam caused by diffraction of the beam when the heated portion of the fluid passes through the beam.

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