Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	3.3V - 5V DC
Output Type	Digital Switch (DO) and Analog (AO)
Detection Area	16mm x 40mm Nickel-plated Surface
Comparator Chip	LM393 High Precision
Sensitivity Adjustment	Potentiometer Controlled
Indicator LED	Power and Trigger Status LEDs
Mounting Holes	3mm Diameter for Easy Installation
Board Dimensions	32mm x 14mm x 5mm
Response Time	Instant Water Activation
Application Scope	Smart Gardening, Weather Stations, Leak Detection

6 reviews

Anonymous

Mar 27, 2026

Rating: 4/5

Great value, easy to integrate

For the price, you can't beat this module. It took me less than 10 minutes to wire it up and get readings. The only minor issue is that the pins are a bit close together, but manageable.

Anonymous

Mar 26, 2026

Rating: 5/5

Perfect for my automated plant system

This sensor works flawlessly with my Arduino setup. The sensitivity adjustment is very precise, allowing me to trigger the irrigation pump exactly when needed. Build quality feels solid.

Anonymous

Mar 26, 2026

Rating: 5/5

Reliable rain detection

I used this to build a small weather station that closes my skylight when it rains. It has been working reliably through several storms without any false positives.

Anonymous

Mar 16, 2026

Rating: 5/5

Saved my garden!

Integrated this into my smart home system to monitor soil humidity indirectly via runoff. It's sensitive enough to detect light drizzle. Very happy with this purchase.

Anonymous

Mar 11, 2026

Rating: 4/5

Solid performance

Works as advertised. The LM393 chip provides stable comparisons. I wish the board was slightly larger for easier handling, but functionality is top-notch.

Anonymous

Mar 10, 2026

Rating: 5/5

Excellent for learning projects

Bought this for a university robotics project. The analog output gives great granular data on moisture levels, not just a binary yes/no. Highly recommended for students.

5 FAQ

Q: Is the sensor waterproof or just water-resistant?

A: The sensing area is designed to get wet and is nickel-plated to prevent rust, but the electronic components on the back of the PCB should be kept dry or conformally coated for long-term outdoor exposure.

Q: Does it come with connecting wires?

A: No, the package includes only the sensor module. You will need to solder your own header pins or wires to connect it to your microcontroller.

Q: How do I calibrate the sensitivity?

A: Use a small screwdriver to turn the blue potentiometer on the board. Turn it clockwise to decrease sensitivity (requires more water to trigger) and counter-clockwise to increase sensitivity.

Q: Can this sensor be used directly with a Raspberry Pi GPIO?

A: Yes, but please ensure you connect the VCC to the 3.3V pin on the Raspberry Pi to avoid damaging the GPIO pins, as the module supports 3.3V to 5V input.

Q: What is the maximum current this module can switch?

A: This module is a signal sensor, not a power relay. The digital output provides a logic signal (HIGH/LOW) and should be used to trigger a transistor, MOSFET, or relay module to control higher current loads.

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