Water Level Controller,water Level Controller

Switches ON the pump when the water in the overhead tank goes below the pre-decided minimum level. Switches OFF the pump when the water level in the overhead tank reaches the maximum level therefore prevents overflow. Switches OFF the pump when the water level reaches the minimum level in the under ground tank therefore prevents dry running. Shall again switch ON the pump when there is sufficient water in the underground tank. Therefor no need to switch ON or switch OFF the pump. No more Overflow or Dry run thus saving water electricity & manpower.