A
Anonymous
Mar 16, 2026
Rating: 3/5
Okay product
Works but sensitive to electrical noise nearby. Had to add shielding.
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 |
| Operating Voltage | 3.3V to 5V DC |
| Output Signal | Digital Switch Output |
| Detection Mode | Non-contact Capacitive |
| PCB Material | FR-4 Epoxy |
| Board Color | Green |
| Dimensions | 30mm x 15mm x 5mm |
| Response Time | Less than 100ms |
| Pin Interface | 3-Pin Header (VCC, GND, OUT) |
| Application | Water Tank, Humidifier, Coffee Machine |
5 reviews
A
Anonymous
Feb 23, 2026
Rating: 5/5
Reliable sensor
Been using it for months in a water tank project without any issues.
A
Anonymous
Feb 04, 2026
Rating: 4/5
Good value
Works well but needs tuning for thick walls. Overall satisfied with the purchase.
A
Anonymous
Feb 01, 2026
Rating: 5/5
Easy to use
Simple wiring made installation a breeze. Recommended for beginners.
A
Anonymous
Jan 31, 2026
Rating: 5/5
Great for Arduino
Works perfectly with my Uno board. Very sensitive and easy to calibrate.
5 FAQ
Q: Does it work through glass containers?
A: Yes, it detects through non-metallic materials like glass and plastic.
Q: Is the module fully waterproof?
A: The sensor area is coated, but do not submerge the circuit components.
Q: What is the max container wall thickness?
A: Typically works up to 5mm depending on the material density.
Q: Does it come with connecting cables?
A: No, only the module and headers are included in the package.
Q: Can I use this with 3.3V logic systems?
A: Yes, it supports both 3.3V and 5V systems comfortably.
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