Description
Reviews
| 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 |
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.
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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