Appliance Balance Switch: During the wash period of your washer, there is comparatively little stress to cause the appliance to move around on the floor. In the high-speed spin, a great amount of centrifugal force is build up in the appliance, and it is particularly noticeable if the clothes load is not evenly distributed around the washer tub. Many items such as a heavy blanket or coat could tend to concentrate the load on one side of the inner washer tub. Most washing machines are designed to take an off-balance condition with no bad effects.
Controlling an electric water pump, to keep a container full of water. Just as in a washing machine, the depth of the water can be sensed from a hose connected to the base of the container.The advantage over a float switch is that the level is easily adjustable. Providing a low water level warning eg, the switch could be used to activate a buzzer or light if the liquid level in a tank drops below an adjustable point.