Optical fluid level monitor

Details Optical fluid level monitor Optical fluid level monitor

1980-01-14

1981-09-01

Goldberg, Gerald

Measuring and testing

Liquid level or depth gauge

With illumination

340619, G01F 2300

Patent

active

042864640

ABSTRACT:
An optical fluid level monitor is disclosed. It comprises a plurality of prismatic sensors disposed in a linear array for measuring the levels of fluids, such as oil, in sumps of aircraft and helicopter engines and other closed containers. In use each of the sensors is sequentially pulsed by an integral light source. If the detector is above the fluid level it appears bright, if below it appears bright, if below it appears dark, this difference being caused by an integral light detector device. Counting circuits are provided to determine the number of bright sensors and electronically convert this into a fluid volume for display purposes. A presettable low volume alarm is also included as is a correction circuit to compensate for volume changes caused by heating of the fluid in use.

REFERENCES:
patent: 3120125 (1964-02-01), Vasel
patent: 3338457 (1967-08-01), Tygenhof
patent: 3834235 (1974-09-01), Bouton
patent: 3957342 (1976-05-01), Newns
patent: 4084426 (1978-04-01), Gales

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