Liquid level measuring process and indicator

Details Liquid level measuring process and indicator Liquid level measuring process and indicator

1974-11-06

1977-02-08

Queisser, Richard C.

Measuring and testing

Liquid level or depth gauge

Hydrostatic pressure type

73301, 73439, G01F 2318, G01N 928

Patent

active

040066355

ABSTRACT:
The present invention relates to a process and device for measuring the level and the specific gravity of a liquid e.g. liquified methane, contained in large-capacity tanks.
The installation comprises two hydrostatic probes for spray a neutral gas into the tank, the first probe emerging near the bottom of the tank and the second slightly below the maximum filling level, a pressure differential/electric voltage transducer each of whose two inputs is connected to a hydrostatic probe, a system for numerically displaying the level and the specific gravity of the liquid contained in the tank, at least one pick-up capable of transmitting a signal when the liquid reaches the predetermined level in the tank, and a device for adjusting the value of the specific gravity of the liquid when the liquid reaches the predetermined level in the tank.

REFERENCES:
patent: 1457406 (1923-06-01), Stancliffe
patent: 1622794 (1927-03-01), Martin
patent: 3023619 (1962-03-01), Sandford
patent: 3038336 (1962-06-01), Peters
patent: 3250123 (1966-05-01), Clayton
patent: 3620085 (1971-11-01), Khoi

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