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Flow and pressure sensor for harsh fluids

  • US 6,681,623 B2
  • Filed: 10/30/2001
  • Issued: 01/27/2004
  • Est. Priority Date: 10/30/2001
  • Status: Active Grant
First Claim
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1. A method for preventing contamination of a sensor exposed to a harsh fluid as a result of fluid flow through a bypass channel integrated with a main channel and a restricted portion thereof, said method comprising the steps of:

  • conducting said harsh fluid through said main channel and said restricted portion thereof, wherein a portion of said harsh fluid contacts said sensor through said bypass channel; and

    introducing an auxiliary flow of a purge fluid, wherein said purge fluid is compatible with a composition of said harsh fluid such that said purge fluid flows past said sensor in opposition to said harsh fluid, thereby preventing said harsh fluid from contacting and degrading said sensor.

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