Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	5V DC
Output Signal	Digital Switching Output (0 and 1)
Sensor Type	Resistive Raindrop Detection
PCB Size	32mm x 14mm
Sensing Area	Large-area nickel-coated lines
Comparator Chip	LM393
Adjustability	Sensitivity adjustable via potentiometer
Indicator	Power LED and Digital Output LED
Mounting Hole Diameter	3.0mm
Application Scope	Arduino, Raspberry Pi, DIY Weather Stations

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Reliable and compact

Used three of these for a prototype. They are consistent in their readings and the large sensing area ensures quick detection. The build quality feels solid for a hobbyist component.

Anonymous

Mar 26, 2026

Rating: 5/5

Exactly what I needed

Fast shipping and the product matches the description perfectly. It integrates seamlessly with my ESP8266 setup to send rain alerts to my phone. Highly recommended for IoT projects.

Anonymous

Mar 24, 2026

Rating: 4/5

Good value, needs calibration

Great little module for the price. Out of the box, it was a bit too sensitive, but after turning the potentiometer slightly, it works perfectly for my automatic window closer system. Just make sure to waterproof your connections.

Anonymous

Mar 13, 2026

Rating: 5/5

Perfect for my weather station project

This sensor works exactly as described. I connected it to my Arduino Uno, and the digital output triggered immediately when I sprayed water on it. The sensitivity potentiometer makes it easy to calibrate for light drizzle versus heavy rain.

Anonymous

Mar 10, 2026

Rating: 4/5

Works well, watch the corrosion

The sensor functions great. One thing to note is that the exposed nickel lines can corrode over time if left constantly wet. I recommend only powering it intermittently or coating the lines with a conformal coating if long-term exposure is expected.

Anonymous

Mar 08, 2026

Rating: 5/5

Easy to use for beginners

I am new to electronics and this was very easy to set up. Plenty of tutorials online for this specific module. The LEDs on the board help visualize when rain is detected, which is great for debugging.

5 FAQ

Q: Can this be used directly with a 3.3V microcontroller like ESP32?

A: The sensor operates at 5V. While the digital output might work with 3.3V logic, it is recommended to use a logic level converter or run the sensor at 3.3V if the LM393 comparator supports it, to ensure safe communication with your ESP32.

Q: Is the sensor waterproof?

A: The sensing lines are designed to get wet, but the electronic components (chip, resistors, pins) on the PCB are not waterproof. You should mount the module at an angle or provide a shield to protect the electronics from direct rainfall.

Q: What is the current consumption of this module?

A: The module typically consumes around 20mA when active. For battery-powered projects, we suggest controlling the VCC pin with a transistor or MOSFET to power the sensor only when taking readings.

Q: Does this module output analog or digital signals?

A: This specific module provides a digital switching output (HIGH/LOW). If you need analog values to measure rain intensity, you would need to look for a version with an AO (Analog Output) pin, though some users read the voltage before the comparator.

Q: How do I adjust the sensitivity?

A: There is a blue potentiometer on the back of the PCB. Turn it clockwise to increase sensitivity (detect lighter rain) and counter-clockwise to decrease it. Test it with a spray bottle while monitoring the output LED.

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