This water sensor is designed to detect water, which can be used to sense water level and leakage. It works by using exposed copper traces to detect the presence of water droplets. The sensor board has a sensing area of 47 x 36mm. The on-board potentiometer is used to set the threshold for the digital output. When there is no water droplet on the sensor board, the digital output (DO) will set to High and the DO LED turns off, and vice versa when the traces are covered with water. The analog pin is provided for more precise measurement.
The sensor works with 3.3V and 5VDC