Attributes

Brand	-
Category	Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin	-
Model Number	M03/M04
Detection Principle	Capacitive Induction
Operating Voltage	3.3V - 5V DC
Output Signal	Digital Switching (0/1)
Cable Length	2.5 Meters
Working Temperature	-20°C to 85°C
Compatible Containers	Non-metallic (Plastic, Glass)
Indicator Type	Green LED Touch Switch
Current Consumption	< 20mA
Package Weight	50 Grams

5 reviews

Anonymous

Apr 14, 2026

Rating: 5/5

Reliable for hydroponics

Using this for my nutrient tank and it works flawlessly. No corrosion issues since it doesn't touch the liquid.

Anonymous

Feb 09, 2026

Rating: 5/5

Easy to integrate

Connected to ESP32 easily. The signal is stable and the green LED helps with debugging during setup.

Anonymous

Feb 03, 2026

Rating: 5/5

Great value

Cheap and effective solution for water level monitoring. Shipping was fast and packaging was secure.

Anonymous

Feb 02, 2026

Rating: 5/5

Perfect replacement

Replaced an old mechanical float switch with this. Much quieter and no moving parts to get stuck.

Anonymous

Jan 22, 2026

Rating: 4/5

Good but sensitive

Works well but needs tuning via the potentiometer for thick plastic containers. Once set, it is accurate.

5 FAQ

Q: What microcontroller boards are compatible?

A: It is compatible with any 3.3V or 5V logic board including Arduino, ESP8266, and ESP32.

Q: Is the cable fully waterproof?

A: The sensor head is waterproof, but we recommend keeping the connection joints dry for longevity.

Q: Does this work with metal water tanks?

A: No, this sensor requires non-metallic containers such as plastic or glass to function correctly.

Q: Can it detect liquids other than water?

A: Yes, it can detect most non-corrosive liquids, though sensitivity may vary based on liquid density.

Q: How do I adjust the detection sensitivity?

A: There is a small potentiometer on the module board that allows you to fine-tune the sensitivity.

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