Non-Contact Capacitive Water Level Sensor 3.3V–5V
Non-Contact Capacitive Water Level Sensor 3.3V–5V
Non-Contact Capacitive Liquid Level Sensor
Monitor water and liquid levels effortlessly — no drilling, no direct contact, no leaks. This compact capacitive liquid level sensor detects liquid presence through the wall of a plastic container, making it ideal for DIY electronics projects, smart appliances, and automated liquid management systems. Receive a low-water or full-water alert without ever exposing electronics to moisture.
Key Features
- Non-Contact Detection: Senses liquid levels through plastic tank walls — no electrodes submerged in liquid.
- Wide Voltage Compatibility: Operates at 3.3V–5V, compatible with Arduino, Raspberry Pi, ESP32, and most microcontrollers.
- Dual Alert Mode: Triggers both low-water and full-water reminders for smart monitoring.
- Simple 3-Wire Connection: Red = positive, Black = negative, Yellow = signal — plug-and-play wiring.
- Plastic Housing: Lightweight, durable, and designed for use in dry environments.
- Versatile Applications: Perfect for hand sanitizer dispensers, water dispensers, aroma diffusers, humidifiers, aquariums, and custom automation projects.
- Sheathed Wire: Neat, protected wiring for clean, secure installations.
Specifications
| Operating Voltage | 3.3V – 5V |
| Detection Method | Capacitive (Non-Contact) |
| Wire Type | Sheathed Wire (Red / Black / Yellow) |
| Material | Plastic |
| Compatible Tanks | Plastic water tanks (non-metallic) |
| Package Contents | 1 × Capacitive Liquid Level Sensor |
| Country of Origin | Made in China |
Important Usage Notes
- Sensor must be placed in close contact with the outer wall of a plastic tank — it cannot detect liquid through metal containers.
- Not suitable for detecting pure alcohol or gasoline.
- Use only in a dry environment — avoid direct exposure to water.
- Avoid use in high-temperature environments.
- Due to manual measurement, please allow a dimensional tolerance of 1–3 mm.
- Actual product color may vary slightly from images due to monitor display differences.
Learn more: OSHA guidance on hand and power tools
Frequently Asked Questions
Q: What containers is this capacitive liquid level sensor compatible with?
A: This non-contact water level sensor is designed to work with plastic containers and tanks. The capacitive sensing technology detects liquid through the plastic wall without needing direct contact. It is not compatible with metal containers or glass tanks.
Q: Can this sensor detect any type of liquid?
A: This capacitive liquid level sensor works well with water-based liquids such as water, sanitizer solutions, and similar fluids. It is not able to detect pure alcohol or gasoline. Always ensure the sensor is used with compatible liquids for accurate readings.
Q: How do I wire this sensor to an Arduino or Raspberry Pi?
A: Wiring is straightforward with 3 color-coded wires: Red = VCC (positive, 3.3V–5V), Black = GND (negative), and Yellow = Signal output. Connect these to the corresponding pins on your microcontroller board. The signal wire will output a HIGH or LOW state depending on whether liquid is detected at the sensor's position.
Q: Does this water level sensor need to be submerged in the liquid?
A: No — that is one of its biggest advantages. This is a non-contact sensor, meaning it attaches to the outside of your tank and detects liquid levels through the container wall. There is no need to submerge any part of the sensor, keeping your electronics completely safe from moisture.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.