Water leak and water level detector

Details Water leak and water level detector Water leak and water level detector

1990-06-08

1991-10-22

Williams, Hezron E.

Measuring and testing

With fluid pressure

Leakage

73304R, 340620, G01M 340

Patent

active

050584219

ABSTRACT:
A leak and liquid level detector includes a transistor as its main operating element with a pair of normally open base contacts connected to the transistor base. The transistor emitter is connected to ground and the transistor collector is connected to a suitable audio alarm, or alarm light or to a programmable logic controller. When a liquid leak bridges over the base contacts, a power circuit is closed across the contacts biasing the transistor and causing an electrical signal to flow from the collector to actuate the alarm, light or controller. The base contacts are linearly adjustable to sense various leak heights. The detector in one mode of use can be positioned horizontally to detect leaks and in a second mode of use is positioned vertically to detect a change in a liquid level in a tank, pipe column or the like.

REFERENCES:
patent: 4593275 (1986-06-01), Kazandjoglou
Cohn, G. Versatile Moisture & Light Detector. In Electronics Australia, vol. 41, No. 6, pp. 98-101, Sept. 1979.
Retawmatic Model 317A Detector literature--2 pages--1989.
Water Alert Alarm Catalog 88 by Dorlen Products--cover and p. 6--recites use since 1974.

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