Pressure Switch Factory(https://www.monroswitch.com/product/pressure-switch/)
Two modes can be switched. “Manual Mode” automatically starts and stops the electric water pump according to the setting pressures, and also 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.