Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | M03 / M04 |
| Detection Type | Non-Contact Capacitive |
| Operating Voltage | 3.3V - 5.5V DC |
| Output Signal | Digital Switch (High/Low) |
| PCB Color | Green |
| Compatible Liquids | Water, Oil, Acidic Solutions |
| Container Material Support | Glass, Plastic, Ceramic (Non-metal) |
| Response Time | < 1 Second |
| Interface | 3-Pin Header (VCC, GND, OUT) |
| Application | Arduino, Raspberry Pi, IoT Projects |
Anonymous
Mar 22, 2026
Rating: 4/5
Works well for plant watering system
Using this to monitor my reservoir for automatic plant watering. It handles the humidity well. Only giving 4 stars because the soldering points are a bit small for thick wires.
Anonymous
Mar 19, 2026
Rating: 5/5
Bulk buy for our workshop
Bought ten of these for our student projects. All of them worked out of the box. The green PCB is clear and the components look solid. Great value for money.
Anonymous
Mar 15, 2026
Rating: 5/5
Easy to integrate with Arduino
Connected VCC, GND, and OUT to my Arduino Uno. The digital output makes coding very simple. High when liquid is detected, low when empty. Highly recommended for beginners.
Anonymous
Mar 09, 2026
Rating: 5/5
Excellent non-contact solution
I've tried contact sensors before that corroded quickly. This capacitive model solves that issue completely. Works through thick plastic bottles too.
Anonymous
Mar 04, 2026
Rating: 5/5
Perfect for my aquarium project
This sensor works exactly as described. I mounted it outside my glass tank and it detects the water level accurately without any wires touching the water. Very safe and reliable.
Anonymous
Mar 02, 2026
Rating: 4/5
Good sensitivity, needs calibration
The module is great quality. You do need to adjust the potentiometer on the back to get the sensitivity right for your specific container thickness, but once set, it stays consistent.
Q: Can this sensor detect liquid inside a metal container?
A: No, this is a capacitive sensor and it cannot penetrate metal walls. It works best with non-metallic containers like glass, plastic, or ceramic.
Q: What is the maximum wall thickness it can detect through?
A: Generally, it can detect through container walls up to 10mm thick, though sensitivity may vary depending on the material density. You can adjust the sensitivity using the onboard potentiometer.
Q: Does it output analog or digital signals?
A: This module outputs a digital signal (HIGH/LOW). If you require an analog reading for precise level measurement, you would need a different type of sensor.
Q: Is this module waterproof?
A: The sensing area is conformal coated and resistant to moisture, but the electronic components on the back are not fully waterproof. We recommend keeping the circuitry dry and only exposing the front sensing pad to the environment.
Q: Can I use this with a 3.3V microcontroller like ESP32?
A: Yes, the operating voltage range is 3.3V to 5.5V, so it is fully compatible with both 3.3V systems like ESP32 and 5V systems like Arduino Uno.
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