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Apparatus for calibrating a sensor for detecting the presence of a gas in a liquid

  • US 4,739,645 A
  • Filed: 10/17/1986
  • Issued: 04/26/1988
  • Est. Priority Date: 10/17/1986
  • Status: Expired due to Term
First Claim
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1. An apparatus for calibrating a sensor that detects the presence or quantity of a gas contained within a liquid comprising:

  • (a) an elongated calibration chamber adapted to hold the sensor in contact with a calibration liquid, the chamber having a calibrating gas inlet through which a calibrating gas may be introduced into the calibration liquid at the lower end of the calibration chamber;

    (b) an elongated calibration liquid reservoir chamber adapted to be partly filled with the calibration liquid, the calibration liquid reservoir chamber being situated laterally of the calibration chamber;

    (c) at least one calibration liquid passageway interconnecting the calibration chamber and the calibration liquid reservoir chamber in the vicinity of the calibrating gas inlet such that calibrating gas entering the calibration chamber via the inlet aspirates calibration liquid from the calibration liquid reservoir chamber into the calibration chamber via the passageway;

    (d) a calibration liquid return and calibrating gas outlet passageway interconnecting the calibration chamber and the calibration liquid reservoir chamber at the upper ends thereof through which calibration liquid may be returned to the calibration liquid reservoir chamber and spent calibrating gas may exit the calibration chamber; and

    (e) a spent calibrating gas vent that opens into the upper end of the calibration liquid reservoir chamber above the liquid level therein for exhausting spent calibrating gas from the apparatus.

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