Fluid level sensor

Details Fluid level sensor Fluid level sensor

1985-02-22

1986-09-02

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

73295, 323366, 338 23, 340599, G08B 2100

Patent

active

046099131

ABSTRACT:
A fluid level sensor utilizes thick film thermistors in a four-thermistor bridge configuration. The bridge is heated by a heater to sense the presence or absence of fluid at a particular level with respect to the thermistors. Upon energizing the bridge with a power source, the middle leads thereof are monitored for voltage separation and polarity. An indicator circuit indicates when one or more of the thermistors is submerged in the fluid. The heater influences the temperature of the thermistors to a greater or lesser extent depending upon whether or not they are submerged. Detectable changes in voltages across the bridge are accordingly produced.

REFERENCES:
patent: 3304278 (1967-02-01), Stuart
patent: 3485100 (1969-12-01), Petersen
patent: 3845443 (1974-10-01), Fisher
patent: 3922658 (1975-11-01), Harper et al.
patent: 4053874 (1977-10-01), Glaser
patent: 4319233 (1982-03-01), Matsuoka et al.
patent: 4389876 (1983-06-01), Szonntagh
patent: 4498337 (1985-02-01), Gruner

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1099978