Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	3.3V - 5V DC
Output Signal	Digital Switch Output (0 and 1)
Detection Medium	Water and non-corrosive liquids
PCB Dimensions	65mm x 20mm x 8mm
Fixed Bolt Hole Diameter	3.0mm
Comparator Chip	LM393
Sensitivity Adjustment	Adjustable via potentiometer
Interface Type	3-pin PH2.0 connector
Working Temperature	-10°C to +50°C
Application Scope	Arduino, Raspberry Pi, DIY projects

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Perfect for my aquarium project

This sensor works exactly as described. I used it to monitor the water level in my custom aquarium setup, and the digital output is very stable. The sensitivity adjustment screw makes it easy to calibrate for different liquid types.

Anonymous

Mar 28, 2026

Rating: 5/5

Great for beginners

As someone new to electronics, I found this module very forgiving. The three pins are clearly labeled, and it doesn't require complex circuitry. It instantly helped me build a water leak alarm.

Anonymous

Mar 26, 2026

Rating: 4/5

Solid performance

Works well for general liquid level monitoring. The board quality seems decent with good soldering points. Just ensure you do not submerge the entire PCB, only the sensing traces at the bottom.

Anonymous

Mar 25, 2026

Rating: 5/5

Reliable detection

I tested this with both fresh water and salt water. It detects the surface level accurately every time. The LM393 comparator ensures a clean signal transition, which is crucial for my logic controller.

Anonymous

Mar 11, 2026

Rating: 4/5

Good value, easy to integrate

Integrated this with an Arduino Uno without any issues. The code examples found online worked immediately. Only giving 4 stars because the included wires are a bit short, but otherwise a solid module.

Anonymous

Mar 01, 2026

Rating: 5/5

Essential for auto-watering system

Using two of these in my greenhouse reservoir. One for low-level warning and one for high-level cutoff. They have been running continuously for a month with no false triggers. Highly recommended.

5 FAQ

Q: How do I adjust the sensitivity?

A: There is a blue potentiometer on the board. Turn it clockwise to increase sensitivity (detect lower liquid levels) and counter-clockwise to decrease it. Test with your specific liquid to find the optimal setting.

Q: Can this sensor detect oil levels or just water?

A: This sensor can detect most non-corrosive conductive liquids, including water and some oils. However, highly viscous or non-conductive fluids may require calibration or might not trigger the sensor reliably.

Q: Is this module waterproof?

A: The sensing traces at the bottom are designed to come into contact with liquid, but the electronic components on the top side of the PCB are not waterproof. Please avoid submerging the entire module.

Q: Does this work with 3.3V logic systems like ESP32?

A: Yes, the module operates on a voltage range of 3.3V to 5V, making it fully compatible with 3.3V logic systems such as the ESP32, ESP8266, and 3.3V Arduino boards.

Q: What is the maximum current this output pin can handle?

A: The digital output pin is intended for signal processing and should be connected to a microcontroller GPIO. It is not designed to drive high-current loads directly; please use a relay or transistor for switching pumps.

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