Liquid Level Measurement System for Analog and Digital Readout.
Patent, Filed 27 Jun 88, patented 15 Aug 89,
DEPARTMENT OF THE NAVY WASHINGTON DC
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An elongated level sensor system has an optical prism formation moulded or cut in a side, and includes a plurality of LED light sources and corresponding photo cells positioned along its length. Light from the LED sources are reflected off the prism surfaces to respective photocells when there is no liquid present in the area, thereby indicating no liquid media present. When liquid surrounds a particular section, light from the LED is not reflected from the prism surfaces, but is refracted out the change in photocell voltage then indicates the presence of liquid storage areas, and read out simultaneously at a remote sensoralarm panel. Patents. jhd
- Test Facilities, Equipment and Methods
- Optical Detection and Detectors