A friend has jsut bought a house and says his bore hole has enough water but the pump pumps faster than the "well can supply" he says he can put a timer on the run for a few minutes every hour but would really like some run dry protection. He says it is a submersible at the bottom of a 8" hole.
I was thinking a float switch but they need room to move unless there is one available with a donut shaped "floater" on a shaft then it doesn't need the swing room of a normal float switch.
Anyone have any experience.