Resistive fluid level sensing and control system

Details Resistive fluid level sensing and control system Resistive fluid level sensing and control system

G - Physics

01

F

G01F 23/24 (2006.01)

Patent

CA 2272502

An electrically resistive fluid level sensor and system for sensing fluid levels in a container, for example washing machine basins, and for closing a supply of fluid to the container when the fluid level in the container reaches a specified level. The system includes generally fluid level resistive element portions disposed in the container and electrically connectable by fluid therein, and an input signal source, electrically coupled to the fluid level resistive element portions, whereby an output signal across the fluid level resistive element portions is proportional to the fluid level. Temperature resistive element portions are preferably disposed in the container and connected in series between the input signal source and the fluid level resistive element portions to substantially cancel any thermal effects on fluid level sensing and control. The fluid level resistive element portions are electrically coupled to a signal input of a comparator circuit, whereby an output signal of the comparator circuit closes the supply fluid to the container when the fluid therein reaches a specified level.

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