Water level sensor

Details Water level sensor Water level sensor

1997-08-08

1999-03-09

Tolin, Gerald

Electricity: circuit makers and breakers

Float

Float and pressure

73313, 340624, H01H 3518

Patent

active

058804234

ABSTRACT:
A water level sensor includes a magnetic tube and a float disposed on a vertical oval rod portion of the magnetic tube. A magnetic switch is contained in the magnetic tube and connected with a power cord. The float has a center hole for the vertical oval bar to extend therein, an inner annular wall extending down to define the center hole with an outer annular wall, and an open lower end closed with a cap. And a magnetic ring is fixed around the center hole on an upper surface of the float. When the float moves down to a preset lower level in water of a tank, the magnetic ring and the magnetic switch produce induction to turn off the power to prevent the tank from burning owing to no water therein.

REFERENCES:
patent: 4398186 (1983-08-01), Statz
patent: 5041812 (1991-08-01), Misaizu
patent: 5103673 (1992-04-01), Sawada

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