Fluid level sensor and controller

Details Fluid level sensor and controller Fluid level sensor and controller

G - Physics

01

F

324/44

G01F 23/26 (2006.01) D06F 33/02 (2006.01) D06F 39/08 (2006.01) G01N 27/22 (2006.01) G05D 9/12 (2006.01)

Patent

CA 2010392

Abstract of the Disclosure A fluid level sensor for determining the amount of liquid in a container. Thin metal plates are placed parallely adjacent each other to form a capacitor cell coated with a non-hygroscopic film. The plates are mounted on the walls of the container containing fluid. As the fluid covers more surface area of the capacitor plates, the dielectric properties of the fluid increase the capacitance of the cell proportionally. The plates are connected to an oscillator whose output frequency varies with the change in container fluid levels. By monitoring these frequency changes, the container fluid levels of the fluid in the container can be controlled.

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