Electronic pressure switch is a control device for strating and ceasing small single phase pumps,make selfpriming jet pump and submersible pump form domestic automation water supply system. As the switch installation on the pumps discharge with the screw into the thread pipe and connected the cable/power,It can control pump by means of water pressure and flow measuring,and distinguish normal working condition from insufficient(run-dry,empty flow)to stop the pump automatically,It also adjusts flow rate and pressure,keeping these constant, Due to min,work pressure to 1.5bar(=15M Head),the min,head of discharge pump must be up to 15M,Electronic pressure switches apply to water distribution from surge tanks and water pressure enhancement for garden irrigation.