Liquid level sensing circuitry

Details Liquid level sensing circuitry Liquid level sensing circuitry

1981-01-05

1983-01-04

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

73304R, 340 59, G08B 2100

Patent

active

043674623

ABSTRACT:
A liquid level sensing circuitry using a conductive probe to sense and store an acceptable or unacceptable level signal. Any unacceptable level signal is stored a short time, determined by the circuitry, following termination of power to a power conductor. The circuitry provides a discernible indication of an unacceptable level when power is subsequently applied to the power conductor if an unacceptable level signal has been stored. A separate discernible signal is provided at such time if an acceptable level signal was stored.

REFERENCES:
patent: 4263587 (1981-04-01), John

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