Apparatus for determining the liquid level in a tank

Details Apparatus for determining the liquid level in a tank Apparatus for determining the liquid level in a tank

1978-12-14

1980-05-06

Woodiel, Donald O.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

361284, G01F 2326

Patent

active

042010853

ABSTRACT:
Apparatus for determining the liquid level in tanks, such as are used in recreational vehicles, which utilizes a pair of parallel plates secured to the outside of the tank to avoid contact with the liquid inside of the tank. The plates have a generally vertical orientation so that as the liquid rises in the tank, an increasing area of the plates is adjacent to the liquid. The change in capacitance between the plates as a function of liquid level is utilized to generate an electrical signal indicative of liquid level. The problems caused by highly viscous liquids coating the inside surface of the tank and yielding false readings are solved by utilizing a high frequency driving signal.

REFERENCES:
patent: 3588859 (1971-06-01), Petree
patent: 3939360 (1976-02-01), Jackson et al.
patent: 4002996 (1977-01-01), Klebanoff et al.

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