Electronic level detector
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 27, 1985
Grant Date -
N/A
app pub date -
Feb 4, 1983
filing date -
Feb 4, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A level detecting device for detecting the level of liquid in a tank includes a displacer or float displaceable in response to the level of the liquid in the tank, an enclosure tube disposed on the tank and sealed thereagainst so that the exterior of the enclosure tube is isolated from the liquid in the tank and a variable transformer for detecting the displacement of the float. The transformer includes at least two windings disposed adjacent the outside of the enclosure tube and an elongate core disposed within the enclosure tube and coupled to the float so as to be movable therewith, the amount of magnetic coupling between the windings being dependent upon the position of the core in the enclosure tube. Means are provided for generating an output signal representing the amount of magnetic coupling between the windings to derive an indication of the level of the liquid in the tank. Since the float and core are isolated from the balance of the apparatus by the enclosure tube, the liquid cannot adversely affect the components of the detector, and hence the life and reliability of the apparatus is extended.
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