Attributes

Brand	-
Category	Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin	-
Model Number	M03 / M04
Operating Voltage	3.3V - 5V DC
Output Signal	Digital TTL (0/1)
Detection Principle	Capacitive Induction
Compatible Containers	Plastic, Glass, Non-metallic
Response Time	Less than 0.5 Seconds
Operating Temperature	-20°C to 85°C
Cable Length	1 Meter
Product Weight	15 Grams
Microcontroller Compatibility	Arduino, ESP32, STM32, PLC

5 reviews

Anonymous

Apr 01, 2026

Rating: 5/5

Reliable and compact

Small form factor makes it easy to hide in my enclosure. The digital output makes coding very simple. Highly recommend for hobbyists.

Anonymous

Mar 28, 2026

Rating: 4/5

Solid performance

Works as expected for water levels. Note that it does not work through metal containers, which is stated in the description, but worth remembering.

Anonymous

Mar 20, 2026

Rating: 5/5

Perfect for my aquarium automation

This sensor works exactly as described. I mounted it outside my plastic tank and it detects the water level accurately without any holes drilled. Very happy with the purchase.

Anonymous

Mar 14, 2026

Rating: 5/5

Great for non-contact projects

I used this for a chemical project where I couldn't touch the liquid. It works through the plastic bottle perfectly. Easy to interface with my ESP32.

Anonymous

Jan 22, 2026

Rating: 4/5

Good sensitivity but needs tuning

The module works well but I had to adjust the potentiometer to get the right sensitivity for my specific container thickness. Once set, it is stable.

5 FAQ

Q: Is this compatible with Arduino Uno?

A: Yes, the module operates at 3.3V to 5V DC and provides a digital TTL output, making it fully compatible with Arduino Uno and similar boards.

Q: How do I adjust the detection sensitivity?

A: There is a small potentiometer on the module board. Use a screwdriver to turn it clockwise or counter-clockwise while testing with your liquid.

Q: Will this sensor work through a metal tank?

A: No, this capacitive sensor requires non-metallic containers such as plastic or glass to detect the liquid level effectively.

Q: Can it detect liquids other than water?

A: Yes, it can detect most non-corrosive liquids including oil and chemicals, provided the container material is non-metallic.

Q: What is the maximum container wall thickness?

A: It typically works well with wall thicknesses up to 10mm, but this may vary depending on the liquid and container material.

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