Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Interface Type | PH2.0 3-Pin |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital Switch (High/Low) |
| Material | FR-4 PCB with Gold Plated Contacts |
| Dimensions | 60mm x 20mm x 8mm |
| Detection Principle | Conductive Trace Exposure |
| Compatibility | Arduino, Raspberry Pi, ESP32, HelloSTEM+ |
| Response Time | < 1 Second |
| Cable Length | 20cm Pre-soldered Wire |
| Application | Water Tank Monitoring, Leak Detection, Hydroponics |
Anonymous
Mar 30, 2026
Rating: 4/5
Compact and effective
Small form factor fits perfectly in my tight enclosure. The only reason for 4 stars instead of 5 is that the wire could be a bit longer, but that's a minor issue.
Anonymous
Mar 26, 2026
Rating: 5/5
Perfect for my Arduino rain alarm
This sensor works exactly as described. The PH2.0 connector made it very easy to plug into my expansion board without soldering. It detects water instantly and the signal is stable.
Anonymous
Mar 25, 2026
Rating: 5/5
Easy integration with HelloSTEM+
Bought this specifically for the HelloSTEM+ ecosystem mentioned in the description. It paired immediately and the library examples worked out of the box. Very satisfied.
Anonymous
Mar 19, 2026
Rating: 5/5
Robust and reliable
I've been using this in a small fountain project for three weeks now. No corrosion on the traces yet, and it handles continuous submersion well. Highly recommended for beginners.
Anonymous
Mar 13, 2026
Rating: 5/5
Great for school projects
Used this for a science fair project on flood detection. It was easy to explain how it works and it performed flawlessly during the demonstration. Excellent educational tool.
Anonymous
Mar 12, 2026
Rating: 4/5
Good value but needs calibration
Great little module for the price. I had to adjust the threshold slightly in my code to avoid false positives from humidity, but once set up, it works great for my plant watering system.
Q: Is this module waterproof or just water-resistant?
A: The sensing area is designed to be in contact with water, but the electronic components on the back of the PCB should be kept dry or coated with conformal coating for long-term durability in humid environments.
Q: What happens if the sensor is left in saltwater?
A: While it will detect saltwater effectively, salt accelerates corrosion on the copper traces. We recommend rinsing the sensor with fresh water after use in saltwater applications to extend its lifespan.
Q: Does this work with 3.3V logic boards like the ESP32?
A: Yes, the module operates comfortably within the 3.3V to 5V range, making it fully compatible with ESP32, ESP8266, and standard 5V Arduino boards.
Q: Can this sensor measure the exact depth of the water in millimeters?
A: No, this is a digital switch sensor. It indicates whether water is present at the level of the exposed traces or not, rather than providing a continuous analog depth measurement.
Q: Is the cable detachable from the module?
A: The wires are pre-soldered to the PH2.0 connector pins on the board. While you can desolder them, they are intended to be a permanent connection for reliability.
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