The pump controller (dry run sensor) VORTEX will automatically turn on and off the electric pump when the pressure drops. Designed to automate the operation of an electric pump, starting when the pressure drops to a set value (opening a tap) or stopping when there is no water flow in the water supply system (closing a tap). Switching off the pump in the absence of water flow occurs with a short delay (about 10 seconds). The controller also protects the electric pump from running dry without water.