1、With this water level sensor module, you can easily detect the water level with great sensitivity. 2、The liquid level detector board also supports automatically control of water pumping and filling. 3、The water pump connects to the COM NC port and automatically fills the water tower with water. 4、The water pump connects to the COM NO port, and automatically pumps water from the water tower. 5、Suits for farm automatic water supply system and other places requiring automatic water supply and water change. Item Type: Water Level Sensor Module Working Voltage: DC 12V Standby Current: 6MA Working Current: 32MA Size: Approx. 63 x 29 x 19mm / 2.5 x 1.1 x 0.7in Weight: Approx. 20 g / 0.7 oz Maximum Load: 10A/250VAC, 10A/125VAC, 10A/30VDC, 10A/28VDC, 10A/12VDC. 1 x Water Level Sensor Module 1 x Cable