Patent ID: 7530269

Claim:
Apparatus for sensing the level of fluid within a container comprising: a) a base fixed relative to the container comprising a non-magnetic housing that isolates a housing interior from harsh fluids in the container; b) a movable member supported by the base for relative positioning with respect to said base; c) a float member that moves relative to the base as the level of fluid in a container changes; d) an arm attached to the movable member and float member wherein the position of the float member is translated into movement of the moveable member with respect to said base; e) at least one magnetic flux sensor coupled to one of the moveable member or base that is capable of creating an electrical output signal in response to a change in magnetic flux density; and f) two magnets disposed on opposite sides of the at least one magnetic flux sensor and are coupled to one of the moveable member or base for providing a magnetic field that extends between the two magnets through a region of the at least one magnetic flux sensor to induce a change in electrical output response from the at least one magnetic flux sensor as the float member moves with changes in fluid level.