Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	3.3V - 5V DC
Output Type	Digital Switch Output (0 and 1)
Detection Area	Large surface nickel-coated lines
Comparator Chip	LM393 Wide Voltage Comparator
Sensitivity Adjustment	Adjustable via potentiometer
PCB Size	60mm x 20mm x 1.6mm
Indicator LED	Power and Trigger status lights
Mounting Holes	4 x 3.1mm diameter holes
Application Scope	Rain detection, water level monitoring
Package Contents	1x Sensor Module, 1x Pin Header

6 reviews

Anonymous

Mar 30, 2026

Rating: 5/5

Perfect for my automated garden system

This sensor works flawlessly with my Arduino setup. The sensitivity adjustment is very precise, allowing me to ignore light mist but trigger on actual rain. Great value for the price.

Anonymous

Mar 24, 2026

Rating: 4/5

Good module, needs calibration

The build quality is solid and the large detection area is a plus. You do need to spend a few minutes calibrating the potentiometer to get the threshold right for your specific environment.

Anonymous

Mar 23, 2026

Rating: 5/5

Great for school projects

Used this for a university weather station project. It was easy to wire up and the documentation provided by the community helped a lot. Highly recommended for beginners.

Anonymous

Mar 23, 2026

Rating: 4/5

Solid performance

Works as described. The only minor issue is that the pins are not pre-soldered, so you need to add your own headers. Otherwise, it's a robust little sensor.

Anonymous

Mar 16, 2026

Rating: 5/5

Excellent sensitivity range

The ability to adjust sensitivity from very high to low is fantastic. I use one to close my skylight automatically when it starts raining. No false alarms so far.

Anonymous

Mar 03, 2026

Rating: 5/5

Reliable and fast response

I've tested this against heavy downpours and it triggers instantly. The digital output makes it easy to interface with microcontrollers without extra components.

5 FAQ

Q: Does this come with connecting wires?

A: The package includes the sensor module and a set of male pin headers that you can solder yourself. Connecting wires are not included in the standard package.

Q: Can this sensor measure the exact amount of rainfall in millimeters?

A: No, this is a digital switch module designed to detect the presence of rain or water. It outputs a high or low signal based on whether water bridges the traces, but it does not quantify the volume of rainfall.

Q: Is this module waterproof for long-term outdoor exposure?

A: While the sensing area is designed to get wet, the electronic components on the back (like the chip and pins) are not fully waterproof. We recommend placing the module in a protective housing with the sensing plate exposed.

Q: What microcontrollers is this compatible with?

A: This module operates at 3.3V to 5V, making it compatible with most popular microcontrollers including Arduino Uno, Nano, Mega, ESP32, ESP8266, and Raspberry Pi (with proper logic level consideration).

Q: How do I adjust the sensitivity?

A: There is a blue potentiometer on the board. Turn it clockwise to increase sensitivity (trigger with less water) or counter-clockwise to decrease sensitivity. Test with small amounts of water while monitoring the output LED.

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