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On-line instrument for measuring effective partial pressure of dissolved gases in a liquid

  • US 5,033,286 A
  • Filed: 06/18/1990
  • Issued: 07/23/1991
  • Est. Priority Date: 06/18/1990
  • Status: Expired due to Fees
First Claim
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1. An instrument for measuring on-line the effective partial pressure of dissolved gases in a liquid, said instrument comprising:

  • (a) a housing having a flow chamber for connecting in flow communication with a flowing stream of liquid to be measured;

    (b) an elongated member rotatably mounted to said housing and extending across said flow chamber for presenting different angles of attack to the stream of liquid flowing through said housing chamber, said member having a point which remains located at a center of the stream of liquid flowing through said housing chamber as the angle-of-attack of said member is changed relative to the stream of liquid;

    (c) means coupled to said member for rotating and thereby changing the angle of attack of said member relative to the stream of liquid; and

    (d) means coupled to said housing for identifying the occurrence of incipient cavitation bubbles at said point of said member.

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