Patent ID: 6546796
Filing Date: 2003-04-15
Classification: G01F

Abstract:
A liquid level sensor comprising:a substrate having a longitudinal axis; a first plurality of thermocouples provided on one side of said substrate in longitudinally spaced relationship; a second plurality of thermocouples provided on said one side of said substrate in longitudinally spaced relationship to each other, respective ones of said second plurality of thermocouples being positioned in laterally spaced relationship to respective ones of said first plurality of thermocouples; said first and second thermocouples being interconnected in alternating series relationship; a heat source for increasing the temperature of each of said first plurality of thermocouples, a heat sink positioned in heat transfer relationship to said plurality of second thermocouples, said sensor being adapted to be positioned within a vessel containing a volume of liquid with said substrate partially immersed in said liquid such that said first and second plurality of thermocouples will cooperate to generate a signal indicative of the level of liquid within said vessel.