Measuring and testing – Liquid level or depth gauge
Patent
1990-07-02
1991-04-09
Cuchlinski, Jr., William A.
Measuring and testing
Liquid level or depth gauge
73304C, 340620, G01F 2326
Patent
active
050054074
ABSTRACT:
A storage installation which is capable of storing a variety of materials, both conductive and non-conductive, includes a level sensing device disposed entirely externally of the container for the material such as to the exterior of the walls thereof. The sensing device includes an elongated strip of metal preferably copper or brass cut to the length of the container when arranged in a vertical direction therefor and applied to the exterior of the container by suitable adhesive material. The sensing element serves as a capacitor component in an oscillator circuit which is arranged whereby the electrostatic field emanating from the sensing strip will change the oscillator amplitude proportional to the level of the material in the container. The detected changes in amplitude in the oscillator circuit will produce a DC level proportional to the level of the oscillator amplitude. The DC level in turn will be processed by a remote indicator circuit to drive a readout meter, bar graph or digital unit.
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Cuchlinski Jr. William A.
Gutierrez Diego F. F.
Level Electronics, Inc.
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