Coaxial cavity for measuring level of liquid in a container

Details Coaxial cavity for measuring level of liquid in a container Coaxial cavity for measuring level of liquid in a container

1978-09-26

1979-10-09

Swisher, S. Clement

Measuring and testing

Liquid level or depth gauge

73304C, G01F 2328

Patent

active

041701356

ABSTRACT:
A method and means for measuring the level of a liquid in a container. A coaxial cavity having a perforated outer conductor is partially submerged in the liquid in the container wherein the liquid enters and terminates the annular region of the coaxial cavity. The fundamental resonant frequency of the portion of the coaxial cavity which does not contain liquid is determined experimentally and is used to calculate the length of the liquid-free portion of the coaxial cavity and thereby the level of liquid in the container.

REFERENCES:
patent: 2584128 (1952-02-01), Hildyard
patent: 3391547 (1968-07-01), Kingston
patent: 3447374 (1969-06-01), Cohn
patent: 3807231 (1974-04-01), Spaw

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