Liquid level detection system

Details Liquid level detection system Liquid level detection system

1984-09-14

1986-12-09

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

73304R, 324 65R, 340 59, G08B 2100

Patent

active

046283021

ABSTRACT:
A detector system for sensing the presence, or absence, of electrically-conductive liquid in contact with two probe members. The system includes switchable voltage sources to selectively establish a potential across capacitors connected to the probe members, and detection systems for sensing the magnitudes of charges on the capacitors. The magnitudes of the sampled charge at given intervals is indicative of the presence, or absence, of ionic liquid in contact with the probe members.

REFERENCES:
patent: 2999230 (1961-09-01), Laakmann
patent: 3291149 (1966-12-01), Atkins et al.
patent: 3644885 (1972-02-01), Radin
patent: 3694804 (1972-09-01), Hill
patent: 3944845 (1976-03-01), Luteran
patent: 4110740 (1978-08-01), Akita et al.
patent: 4263587 (1981-04-01), John

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