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Device for the measurement of liquid level

  • US 4,056,887 A
  • Filed: 07/12/1976
  • Issued: 11/08/1977
  • Est. Priority Date: 07/12/1976
  • Status: Expired due to Term
First Claim
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1. A machine for determining the distance from the bottom of a storage tank to the liquid-vapor interface of a liquid stored therein comprising:

  • a movable liquid-vapor interface probe in the storage tank, said probe including at least one electrically actuated medium sensing element;

    pg,24a drive means including a cable, a motor means, and a motor control means;

    said cable at least partially extending into said storage tank, said cable connected to said probe;

    a measurement signal means;

    said motor means connected to said cable for lifting and lowering said cable and said probe within said storage tank, said motor means connected to said measurement signal means to provide at least one liquid-vapor interface position signal;

    said motor control means connected to said motor, means and said liquid vapor interferface probe;

    said measurement signal means connected to said motor control means for providing at least one liquid-vapor interface position signal;

    a sensing system connected to said cable for sensing the bottom of said storage tank, said sensing system connected to said motor control means and said measurement signal means to provide liquid-vapor interface position signal from the bottom of the storage tank.

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