Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Type | Digital Switch Output (0 and 1) |
| Detection Area | 40mm x 16mm |
| Board Dimensions | 65mm x 20mm x 8mm |
| Comparator Chip | LM393 |
| Sensitivity | Adjustable via Potentiometer |
| Indicator LED | Power and Digital Switch Output |
| Mounting Hole Diameter | 3.0mm |
| Interface | 3-Pin PH2.0 Connector |
| Application Scope | Water Leak Detection, Rain Sensing, Liquid Level Monitoring |
Anonymous
Mar 30, 2026
Rating: 5/5
Compact and effective
Small footprint makes it easy to hide in tight spaces. I installed one under my washing machine to detect leaks. It triggered my smart home notification immediately during a test. Great peace of mind for such a low cost.
Anonymous
Mar 18, 2026
Rating: 5/5
Reliable water detection
I bought five of these for a tank level monitoring system. They are consistent and the digital output makes reading the state very simple without needing complex analog conversion logic. The build quality feels sturdy enough for indoor prototypes.
Anonymous
Mar 15, 2026
Rating: 4/5
Good value, easy to integrate
Great little module for the price. Integration with ESP32 was straightforward. The only reason for 4 stars instead of 5 is that the included pins were not pre-soldered, but that's standard for these types of boards. Highly recommend for beginners.
Anonymous
Mar 14, 2026
Rating: 5/5
Perfect for my Arduino rain project
This sensor works exactly as described. The sensitivity adjustment is very responsive, allowing me to fine-tune when the trigger activates. I used it to build a simple rain alarm for my balcony plants, and it has been reliable through several storms.
Anonymous
Mar 07, 2026
Rating: 5/5
Excellent for school projects
Used this for my final year engineering project on smart home safety. It detected water spills instantly. The documentation online is plentiful, which helped me write the code quickly. Very satisfied with the purchase.
Anonymous
Mar 04, 2026
Rating: 4/5
Works well but needs calibration
The sensor is sensitive, perhaps too sensitive out of the box. You definitely need to spend time adjusting the potentiometer to get the right threshold for your specific use case. Once calibrated, it performs flawlessly.
Q: What microcontroller boards is this compatible with?
A: It is compatible with any microcontroller that supports digital input at 3.3V or 5V logic levels, including Arduino Uno, Nano, Mega, ESP8266, ESP32, and Raspberry Pi (with appropriate voltage leveling if needed).
Q: Does the package include connecting wires?
A: Typically, the package includes the sensor module and a set of male-to-female jumper wires or header pins, depending on the specific SKU selected. Please check the 'What's in the Box' section of your specific order.
Q: Is this module waterproof for long-term submersion?
A: The sensing area is designed to get wet, but the electronic components (chip, resistors, pins) are not waterproof. Long-term submersion may cause corrosion or short circuits. It is best used for splash detection or intermittent contact.
Q: How do I adjust the sensitivity?
A: There is a blue potentiometer on the board. Use a small Phillips screwdriver to turn it clockwise to increase sensitivity (detect less water) or counter-clockwise to decrease sensitivity. Test with small water droplets while monitoring the output LED.
Q: Can this sensor measure the exact depth of the water in millimeters?
A: No, this is a digital switch sensor. It detects the presence or absence of water on the exposed traces. It does not provide an analog reading proportional to water depth.
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