G - Physics – 01 – F
Patent
G - Physics
01
F
340/141
G01F 23/26 (2006.01)
Patent
CA 1067981
ABSTRACT A gauge for monitoring the height of liquid contained in a storage tank or the like, comprising a channel-like structure having a first elongate probe element constituted as a circuit board having a conductive strip running for a substantial length therealong, an additional upright probe element also constituted as a circuit board, coextensive with the first and also having a conductive strip running for a substantial length therealong, and an elongate member disposed along the boards and constituting a spacer for maintaining the conductive strips of each of the elements in substantially parallel relation. Means are provided for mechanically con- necting the boards to the spacer, with both probe elements be- ing adapted for immersion in the liquid being gauged. In ad- dition, means are provided for impressing a voltage on the con- ductive strip of one probe element, and additional means for de- tecting voltage induced or sensed on the conductive strip of the other probe element, the latter voltage being a function of the immersion of the elements in the liquid being gauged. By the invention there is no dielectric material in the area be- tween the conductive strips. The advantage of the present con- struction over prior devices is that the likelihood of debris and residue in the tank bridging the gap between the strips is greatly minimized, since there is complete access of the fluid to those portions of each board which carry the strips. Improved performance and accuracy over extended periods of use thereby result.
261966
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