Measuring distance of sensor is 10cm to 2.5m from the sensor. Power by Adaptor (90V AC -220V AC). Auto Control the Water Pump and the Max AC Pump can be 16A/2.5KW.When the water level reaches the set low alarm level, the display will alarm and start the water pump to add water to the water tank. When the water level reaches the full level, the display will alarm and stop the water pump.Noncontact Ultrasonic Sensor can adapt to acid, alkali, salt, high temperature occasions.Real-time display room and water tank temperature and Temperature detect range is -10℃-70℃.Continuous level detection in real time.Size of LCD display is 928644mm .