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Jet type liquid level sensor and system

  • US 4,161,188 A
  • Filed: 12/02/1977
  • Issued: 07/17/1979
  • Est. Priority Date: 12/02/1977
  • Status: Expired due to Term
First Claim
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1. A jet liquid level sensor comprising a body having a nozzle and a receiver, the nozzle having an inlet and a discharge orifice, the receiver having an inlet orifice and an outlet, said orifices being aligned along a substantially horizontal axis and spaced apart, a shroud extending from the nozzle beyond said discharge orifice toward said receiver, said shroud being horizontally separated from said receiver by an unobstructed space, said shroud defining a shut off chamber axially adjacent said discharge orifice through which liquid issuing from the discharge orifice passes in a substantially horizontal direction as a jet stream that is received in said receiver inlet, means to introduce liquid vertically into said shut off chamber at a flow rate insufficient to divert said jet stream from said receiver inlet, said means including a pickup tube extending from the sensor and having one end communicating laterally with said shut off chamber and having its other end radially spaced from said discharge orifice, and said shroud having open end means communicating axially with said shut off chamber to introduce liquid from said tank axially into said shut off chamber to prevent the jet stream from flowing to the receiver inlet.

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