Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | M03 / M04 |
| Detection Type | Non-Contact Capacitive |
| Operating Voltage | 3.3V - 5.5V DC |
| Output Signal | Digital Switch (High/Low) |
| PCB Color | Green |
| Compatible Liquids | Water, Oil, Acidic Solutions |
| Container Material Support | Glass, Plastic, Ceramic (Non-metal) |
| Response Time | < 1 Second |
| Interface | 3-Pin Header (VCC, GND, OUT) |
| Application | Arduino, Raspberry Pi, IoT Projects |
Anonymous
Mar 31, 2026
Rating: 5/5
Perfect for my aquarium project
This sensor works exactly as described. I mounted it outside my glass tank and it detects the water level perfectly without any wires touching the water. Very reliable for automation.
Anonymous
Mar 28, 2026
Rating: 5/5
Great value for money
Bought two of these for a plant watering system. They are small, easy to wire up to an Arduino, and the non-contact feature prevents corrosion issues I had with old probes.
Anonymous
Mar 17, 2026
Rating: 5/5
Reliable digital output
Clean signal output makes coding very simple. No noise issues detected. Works well through thick plastic bottles which was my main concern.
Anonymous
Mar 16, 2026
Rating: 4/5
Solid component for students
We used these in a classroom setting for a robotics competition. They are durable enough for student handling and provide consistent results. One unit was slightly less sensitive than the others.
Anonymous
Mar 15, 2026
Rating: 5/5
Solved my leak detection need
Attached this to the bottom of my washing machine supply line container. It triggers an alert immediately when water is present. Simple and effective solution.
Anonymous
Mar 08, 2026
Rating: 4/5
Good sensitivity, needs calibration
The module is sensitive and responsive. You do need to adjust the potentiometer on the back to get the threshold right for your specific container thickness, but once set, it stays consistent.
Q: Can this sensor detect liquid levels through a metal container?
A: No, this is a capacitive sensor designed for non-metallic containers such as glass, plastic, or ceramic. Metal containers will interfere with the capacitance reading.
Q: Does this work with corrosive liquids like acid?
A: Yes, since the sensor does not come into direct contact with the liquid, it can safely detect levels of corrosive liquids provided they are in a compatible non-metal container.
Q: How do I adjust the sensitivity?
A: There is a blue potentiometer on the back of the PCB. Use a small screwdriver to turn it clockwise to increase sensitivity or counter-clockwise to decrease it while testing with your target liquid.
Q: Is this module waterproof?
A: The sensing area is conformal coated and resistant to moisture, but the electronic components and pins are not fully submersible. Only the sensing face should be exposed to potential splashes.
Q: What is the maximum wall thickness of the container it can penetrate?
A: Generally, it can detect through container walls up to 13mm thick, though sensitivity may vary depending on the material density and liquid type.
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