Capacitive fluid level sensor

Details Capacitive fluid level sensor Capacitive fluid level sensor

G - Physics

01

F

340/141

G01F 23/26 (2006.01)

Patent

CA 2037847

ABSTRACT OF THE DISCLOSURE A device that determines liquid level or volume by means of charging a plurality of capacitors in sequence. Each capacitor is charged for a fixed time interval. The voltage level obtained is a function of the liquid level and is compared with a known voltage to obtain an output signal that can be used to represent liquid depth. The capacitors are formed by two concentric tubes, one inside the other in a spaced relationship. The tubes reduce the effect of sloshing in the tank, resulting in a more stable reading. To measure volume or level in an irregular shaped tank, the capacitors can be arranged in a non-linear manner. The device has no moving parts to wear out and thus results in higher reliability and longer life. 7633o

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