Attributes

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

6 reviews

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.

5 FAQ

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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