Liquid level monitor

Details Liquid level monitor Liquid level monitor

G - Physics

01

F

G01F 23/28 (2006.01) G01F 23/292 (2006.01)

Patent

CA 2100603

A liquid level monitor for sensing the level of liquid in a tank or vessel, typically an automobile radiator, employing a probe with a light emitting diode and phototransistor mounted inside an enclosure, the enclosure having a transparent lens through which light can pass, and the lens having a prism configuration which diffuses or alters stray light which occurs by reflection off an interior core wall of the vessel and prevents the diffused or dispersed light from rendering the phototran- sistor conductive and possibly leading to a false indi- cation or reading of liquid level. The light emitting diode is electrically excited with a high-intensity, short duration pulse, which improves the sensitivity of the monitor. The advantage of the present construction is that there are eliminated erroneous readings result- ing from stray light reflections off internal structures in the tank.

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