Liquid level transducer with isolated sensors

  • US 9,116,030 B2
  • Filed: 01/17/2012
  • Issued: 08/25/2015
  • Est. Priority Date: 01/17/2012
  • Status: Active Grant
First Claim
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1. A transducer for determining the level of liquid within a container, the transducer comprising:

  • a mounting head adapted for connection to the container, the mounting head having a first housing with first wall structure defining a first hollow interior;

    a second housing having second wall structure defining a second hollow interior in fluid communication with the first hollow interior of the first housing, wherein at least the second hollow interior is isolated from liquid within the container;

    a sensor assembly adapted to extend into the container, the sensor assembly comprising;

    a sensor board located within the second hollow interior;

    at least one sensor element located on the sensor board within the second hollow interior;

    a pivot mount operably associated with the housing and defining a pivot axis spaced from the second hollow interior;

    a float rod connected to the pivot mount of the housing for pivotal movement about the pivot axis;

    a float connected to the float rod to thereby cause pivoting movement of the float rod about the pivot axis in response to a change in liquid level within the container; and

    an actuator located outside of the housing and connected to the float rod for pivotal movement therewith, the actuator being operative to change an electrical state of the at least one sensor element to thereby indicate a level condition of the liquid within the container.

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