This rain sensor can be used for all kinds of weather monitoring, and translated into digital output signals and analog. Humidity Detection Sensor Module Snow Rain raindrops Detection for Arduino

• Sensitivity can be adjusted via potentiometer LED lights up when there is no rain output is high; as soon as  raindrop is detected, the output goes to ground level (0V).
• Connect to the microcontroller/Arduino ADC port to detect the size of the drops in the above rainfall. DO TTL digital outputs can also be connected to the microcontroller detects whether there is rain.
• Digital outputs (0 and 1) and analog AO voltage output; TTL-level output, TTL output valid signal is low. Driving capability 100MA so, can directly drive relays, buzzer or small fan.

Pin functions include:

• VCC(3V to 5V)
• GND
• AO (Analog Output)
• Digital Output (TTL levels)

Package Includes:

• Rain sensing pad
• Sensing PCB
• Dupont cable