A
Anonymous
Mar 11, 2026
Rating: 5/5
Reliable and compact
Small footprint fits nicely in my enclosure. Signal is stable and doesn't fluctuate much.
Description
M03 M04 Water Level Detection Module Sensor
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Model Number | M03 / M04 |
| Detection Principle | Capacitive Sensing |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital High/Low |
| Max Detection Thickness | 13mm (varies by material) |
| PCB Material | FR-4 Double Layer |
| Operating Temperature | -20°C to 85°C |
| Connector Type | PH2.0 3-Pin |
| Sensitivity Control | Adjustable Potentiometer |
| Module Size | 65mm x 19mm x 8mm |
5 reviews
A
Anonymous
Feb 26, 2026
Rating: 5/5
Works perfectly for my aquarium project
Very sensitive and easy to calibrate. Used it outside the tank and it detects water level accurately without getting wet.
A
Anonymous
Feb 11, 2026
Rating: 3/5
Struggles with thick glass
Works on thin plastic but couldn't detect through my thick glass jug. Check your container thickness before buying.
A
Anonymous
Feb 04, 2026
Rating: 5/5
Great for automation
Integrated this with an Arduino seamlessly. The non-contact feature is a huge plus for corrosion prevention.
A
Anonymous
Jan 22, 2026
Rating: 4/5
Good sensor, needs tuning
Works well once you adjust the potentiometer. Had to spend some time getting the sensitivity right for my plastic container.
5 FAQ
Q: Does it work with 12V systems?
A: No, the operating voltage is 3.3V to 5V DC. You may need a level shifter.
Q: Can this detect oil levels?
A: Yes, it works with most non-metallic liquids, but sensitivity may vary based on viscosity.
Q: What is the maximum container thickness?
A: Typically up to 13mm, but depends on the container material.
Q: Is it waterproof?
A: The sensor side is conformal coated, but the electronics should not be submerged.
Q: How do I adjust sensitivity?
A: Use the blue potentiometer on the board. Turn clockwise to increase sensitivity.
