Apparatus for sensing liquid level

摘要

The level of liquid in a tank is sensed using a pair of magnets arranged such that when in proximity to each other, a magnetic force is generated that activates a micro-switch. One of the magnets is mounted on a float carried on the surface of the liquid and constrained for vertical movement within a tube. The second magnet is stationarily mounted on the tube at a position where the liquid level is to be sensed. A latch mechanism actuated by the movement of the second magnet latches the micro-switch in an actuated position until actuated by the second magnet a second time.