To provide a liquid level sensor with reduced cost by easily and precisely correcting output characteristics due to variations of characteristics of individual components and assembly of the components.
This sensor has a magnet moving linking with vertical movement of a liquid level and a magnetoelectric conversion element 10 for outputting a quantity of electricity corresponding to the position of the magnet. The output of the conversion element 10 is supplied to an arithmetic processing means 11. A computing unit 14 of the processing means 11 computes an expression, DOθ=DOE+{(DOF-DOE)/(DSF-DSE)}.(DSθ-DSE), where DOE and DOF are reference outputs of the sensor at reference positions or the uppermost and lowermost levels of the liquid, DSE and DSF are actual sensor outputs at the two reference positions, DSθ is a detection output of the transduction element 10, and DOθ is a correction output.
ASAMI TAKASHI
HIROTA MASAKI
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