Patent ID: 7222530

Claim:
A non-contact type liquid level sensor comprising: a housing; a rotational shaft that is rotatably provided in the housing; a magnet that is fixed to an outer circumferential surface of the rotational shaft in such a manner as to rotate together with the rotational shaft; a pair of stators that are disposed in the housing so as to face to an outer circumferential surface of the magnet; a float arm that comprises one distal end on which a float is provided, and the other distal end which is supported at the rotational shaft; and a magnetoelectric converting element that is disposed in the housing, magnetically detects a moving position of the float arm, and outputs an electric signal indicating a liquid level according to the moving position, wherein the magnetoelectric converting element comprises a memory which stores an output value with respect to the liquid level, the memory stores a desired uppermost position and a desired lowermost position of the float as an uppermost liquid level and a lowermost liquid level, respectively, and output values respectively corresponding to the desired uppermost position and the desired lowermost position of the float are set so as to be saturated in an area which is higher than the desired uppermost position and an area which is lower than the desired lowermost position, respectively.