Logicpress electronic pressure switches are for use with surface and submersible pumps that have sufficient flow and pressure. They will start a pump immediately when a valve in the pipe system is opened and stop the pump immediately when the valve is closed. They have integral dry running protection, an external reset switch, pump status LEDs, power black-out auto reset, auto restart, motor inactivity management, dual voltage (110-230v) and have IP65 protection. Minimum flow required inwards is 1 litres per minute. SET versions have start pressure settings of 1.5, 2.0 and 2.5 bar, which can be programmed by the user. M versions have a pressure gauge.