A
Anonymous
Mar 14, 2026
Rating: 5/5
Reliable detection
Using it for a pump control system. No false positives so far.
Description
Non-Contact Liquid Level M03/04 Water Level Detection Module Sensor, Green Touch Switch Liquid Inductor
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Model Number | M03/M04 |
| Detection Type | Non-Contact Capacitive |
| Operating Voltage | DC 3.3V - 5V |
| Output Signal | Digital Switch Signal |
| PCB Material | FR-4 Fiberglass |
| Cable Length | 1.5 Meters |
| Indicator Light | Green LED |
| Installation | External Mounting |
| Container Compatibility | Plastic, Glass, Ceramic |
| Package Weight | 25 Grams |
5 reviews
A
Anonymous
Feb 27, 2026
Rating: 5/5
Perfect for non-metallic tanks
I was worried it wouldn't work through my plastic water tank but it detects level perfectly.
A
Anonymous
Feb 24, 2026
Rating: 5/5
Easy integration
Connected directly to my microcontroller without issues. Stable readings.
A
Anonymous
Feb 22, 2026
Rating: 4/5
Good sensor, needs calibration
Works well but you need to adjust sensitivity for different liquid types.
A
Anonymous
Feb 19, 2026
Rating: 5/5
Works great for aquarium
Very sensitive and easy to wire up. The green LED is bright enough to see status.
5 FAQ
Q: How do I adjust the sensitivity?
A: There is a potentiometer on the module to tune detection range.
Q: Can it detect oil levels?
A: Yes, it works with most non-corrosive liquids including water and oil.
Q: What voltage does this require?
A: It operates safely between 3.3V and 5V DC.
Q: Does this work through metal tanks?
A: No, this sensor requires non-metallic containers like plastic or glass.
Q: Is the cable waterproof?
A: The module is coated, but the cable connections should be kept dry.
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