Thermal liquid level detector

Details Thermal liquid level detector Thermal liquid level detector

1975-01-30

1976-05-11

Gill, James J.

Measuring and testing

Liquid level or depth gauge

Thermal type

G01F 2322

Patent

active

039554163

ABSTRACT:
A pulsed thermal liquid level detector system is disclosed. The system includes a probe having a thermistor and a resistor disposed therein. The thermistor is thermally coupled to the resistor and is thermally coupled to a predetermined external surface of the probe by way of a material of low thermal resistance and capacity. The resistor is electrically coupled to a source of pulses which act to dissipate energy in the resistor thereby to heat the thermistor in accordance with the level of the pulses. The resistance of the thermistor varies in accordance with the temperature excursions induced by the pulses and within a range determined by the thermal capacity of the thermistor. The effective thermal capacity of the thermistor increases when the predetermined external surface is thermally coupled to a liquid which therefore reduces the resistance excursions of the thermistor. The resistance of the thermistor is monitored by an external circuit to provide an indication of a liquid level transition when the resistance excursions of the thermistor are greater or less than a predetermined value.

REFERENCES:
patent: 2928037 (1960-03-01), Lawrence
patent: 3324722 (1967-06-01), Reicks

Affiliated with

Also associated with

Rating

Thermal liquid level detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thermal liquid level detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal liquid level detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1295379