Conductance/thermal limit control apparatus and method

Details Conductance/thermal limit control apparatus and method Conductance/thermal limit control apparatus and method

1990-12-20

1992-05-12

Shoap, Allan N.

Measuring and testing

Liquid level or depth gauge

With other measuring device

374142, 122504, 340620, 340622, G01F 2300, G01K 1302

Patent

active

051116910

ABSTRACT:
A probe which mounts in a liquid container has a conductance electrode containing a temperature sensor. A conductance control circuit is coupled to the probe to control an output relay in accordance with predetermined impedance conditions at the probe, and a temperature limit control circuit also controls the output relay in accordance with predetermined temperature conditions at the probe.

REFERENCES:
patent: 3477290 (1969-11-01), Lerner
patent: 3975582 (1976-08-01), Ford
patent: 4007713 (1977-02-01), DeLeonardis
patent: 4027172 (1977-05-01), Hamelink
patent: 4196341 (1980-04-01), Williams
patent: 4256258 (1981-03-01), Sekiya
patent: 4259982 (1981-04-01), Bartels
patent: 4263587 (1981-04-01), John
patent: 4313102 (1982-01-01), Broetto
patent: 4929930 (1990-05-01), Rezabek
Solitech-Series TL Combination Controls Temperature & Liquid Level Control With Single Sensor in one package.

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