Pressure Switch(https://www.monroswitch.com/product/pressure-switch/)
Brand-new design and appearance for a mechanical pressure switch with an intelligent LCD (Liquid Crystal Display) display. Two modes can be switched. “Manual Mode” automatically starts and stops the electric water pump according to the set pressures and displays real-time pressure. Time mode used for filling up the water tower, the time setting will be changed as 0.1H,0.2H …0.9H, 1H, 2H …24H. Water shortage alarm.