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Composition pulse time-of-flight mass flow sensor

  • US 7,225,683 B2
  • Filed: 09/11/2003
  • Issued: 06/05/2007
  • Est. Priority Date: 07/31/2002
  • Status: Active Grant
First Claim
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1. A device for measuring the flow rate of a fluid in a flow channel, comprising:

  • means for creating localized compositional variations in the fluid along the flow axis;

    means for subsequently detecting the compositional variation at a point downstream from its point of creation; and

    means for measuring flight time, wherein said device is capable of measuring flow rates from less than about 1 nL/min to greater than about 10 μ

    L/min at pressures as great as 2,000 psi.

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