Liquid level sensor device

Details Liquid level sensor device Liquid level sensor device

1996-06-03

1997-05-06

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

340612, 340618, 340624, 73290R, 73304R, 73308, 73313, G08B 2100

Patent

active

056275234

ABSTRACT:
A liquid level sensor device, particularly adapted for use with corrosive and hazardous liquids such as oil, for measuring the liquid level in a storage tank or vessel. A tubular device is placed vertically in a liquid storage tank and senses the liquid level by having a float embedded with magnets move vertically along the axis of reed switches encased in the tubular device. The device contains temperature sensors to measure the temperature of the tank fluid, and microprocessors that scan the reed switches, transmitting data through a connector in the device top to a nearby computer for recording and transmission to a control and monitoring location. The electrical data system inside the device utilizes only two conductive trace runs throughout the device length to maximize reliability while minimizing the copper used. Special mechanical and electrical assembly connectors inside the device permit the device to flex safely in turbulent liquid conditions, without breakage.

REFERENCES:
patent: 4384184 (1983-05-01), Alvarez
patent: 4976146 (1990-12-01), Senghaas et al.
patent: 5146785 (1992-09-01), Riley
patent: 5275044 (1994-01-01), Riley
patent: 5347864 (1994-09-01), Senghaas et al.

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