Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Brand	Zave
Model Number	ZV-WLS-01
Operating Voltage	3.3V - 5V DC
Output Type	Digital Switch (DO) and Analog (AO)
Detection Area	40mm x 16mm
Material	FR-4 Double-sided Board with Nickel Coating
Comparator Chip	LM393
Indicator LED	Yes, Power and Detection Status
Mounting Hole Diameter	3.0mm
Application	Water Level Monitoring, Leak Detection, Rain Sensing

6 reviews

Anonymous

Mar 15, 2026

Rating: 4/5

Good quality, easy to integrate

The build quality is solid with nice gold plating on the traces. Integration with my ESP32 was straightforward. I deducted one star because the included header pins were slightly bent, but nothing a quick fix couldn't solve.

Anonymous

Mar 12, 2026

Rating: 5/5

Bought 10 for student projects

We purchased these for our high school robotics club. They are durable enough to handle student handling and provide consistent readings. The analog output allows students to measure water depth gradients, not just presence.

Anonymous

Mar 11, 2026

Rating: 5/5

Reliable leak detector

I placed this under my washing machine as an early warning system. It has been sitting there for months without false alarms, but when I tested it with a cup of water, it reacted immediately. Highly recommended for home safety.

Anonymous

Mar 06, 2026

Rating: 5/5

Essential for automatic plant watering

Using this to monitor the reservoir level in my automated garden system. It prevents the pump from running dry. The corrosion resistance seems good so far after two weeks of constant exposure to humidity.

Anonymous

Mar 06, 2026

Rating: 5/5

Perfect for my Arduino rain alarm

This sensor works exactly as described. The sensitivity is adjustable via the potentiometer, which makes it very versatile. I used it to detect rain on my balcony and it triggers my buzzer instantly. Great value for the price.

Anonymous

Mar 01, 2026

Rating: 4/5

Works well once calibrated

As a beginner, I found the calibration process a bit tricky at first, but the online tutorials helped. Once set up, the digital output is clean and reliable. Just make sure you don't submerge the electronic components, only the sensing traces.

5 FAQ

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

A: The onboard LM393 comparator output is intended for signal logic, not for driving high-power loads directly. It should be connected to a microcontroller or used to trigger a relay/MOSFET for higher current applications.

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

A: Yes, but please note that the Raspberry Pi GPIO pins operate at 3.3V logic. Ensure you configure the sensor's VCC to 3.3V or use a voltage divider/logic level shifter if powering at 5V to avoid damaging the Pi.

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

A: The sensing area (the exposed traces) is designed to come into contact with water. However, the backside containing the solder joints and chips is not waterproof. We recommend conformal coating the back if used in very humid environments.

Q: How do I adjust the sensitivity?

A: There is a blue potentiometer on the board. Turn it clockwise to increase sensitivity (detect less water) or counter-clockwise to decrease it. Use a small screwdriver while testing with water to find your ideal setting.

Q: Does the package include connecting wires?

A: The standard package includes the sensor module and a set of header pins for soldering. Connecting wires are not included but can be easily attached to the header pins once soldered.

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