Wired Water Liquid Level Sensor Dual Ball Stainless Steel Float Switch Silver Tone (150mm-S)

The dual float will be used in a remote sump pump control. Bottom float will cycle as needed, top float is back up to bottom float and high event latching alarm. Float switches trigger timing circuits to allow the pump time to lower sump pit water level. A third float switch near the bottom of the pit acts as a pump shut off safety to prevent totally emptying the pit and running the pump dry.

Stopped working properly after only few hours

This switch works just the opposite than it should. When the float is up turns the water on, when the float is down turns the water off unless I'm missing something

This works really great if you have optically isolated the circuitry. If there's any power at all in your sensing circuit the reed relays seem to stick. Then if you let the power off for a while and shake it it seems to work again.

Float was dented but still functional.