Size is  32mm x 11mm x 20mm

Main chip: LM393, moisture-sensing probe

Working voltage: DC 3-5V

Characteristics

        1, with the output instruction, active-low, the output light;
        2, single output, response time 10s;
        3, the humidity output valid signal is low, sensitivity adjustable;
        4, widely used to detect humidity, rain and other occasions, the output TTL level signals;

        5, with mounting holes for easy permanent installation;

        6, the output switch circuit board can be connected directly to microcontroller IO port.