Analog hall-effect liquid level detector and method

Details Analog hall-effect liquid level detector and method Analog hall-effect liquid level detector and method

1994-05-16

1997-06-10

Cuchlinski, Jr., William A.

Measuring and testing

Liquid level or depth gauge

Float

73 173, G01F 2368

Patent

active

056365489

ABSTRACT:
A method and apparatus for measuring a liquid level by a float carrying one or more magnets and movably positioned adjacent spaced analog output voltage Hall-effect sensors. The apparatus is calibrated by moving the float relative to the sensors and measuring the voltage outputs of the sensors relative to the position of the float, and storing the measured values. After calibrating, the voltage outputs of any sensors activated by the presence of the float are measured and compared to the stored values to determine the liquid level. Preferably, the voltage output of at least two sensors are measured while the float is at one position for greater accuracy.

REFERENCES:
patent: 4014015 (1977-03-01), Gundlach
patent: 4125022 (1978-11-01), Sumida
patent: 4361835 (1982-11-01), Nagy
patent: 4466284 (1984-08-01), Dumery
patent: 4589282 (1986-05-01), Dumery
patent: 5016198 (1991-05-01), Schreiber
patent: 5156048 (1992-10-01), DeFigueiredo

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