Non-Contact Capacitive Liquid Level Sensor 3.3V–5V + Switch
Non-Contact Capacitive Liquid Level Sensor 3.3V–5V + Switch
Non-Contact Capacitive Liquid Level Sensor with Switch Controller
Monitor water and liquid levels accurately — without any direct contact with the liquid. This compact capacitive liquid level sensor works through plastic tank walls to detect fill levels, triggering alerts when a container runs low or reaches capacity. Ideal for DIY electronics projects, smart appliances, and automated dispensing systems.
Key Features
- Non-Contact Detection: Senses liquid levels through the outer wall of plastic tanks — no probes submerged, no corrosion risk.
- Wide Voltage Compatibility: Operates at 3.3V–5V, making it compatible with Arduino, Raspberry Pi, and most microcontroller platforms.
- Built-In Switch Controller: Integrated switch output for easy low-level or full-level alerts — perfect for water shortage or full-tank reminders.
- Sheathed Wire Connections: Color-coded for easy wiring — Red (positive), Black (negative), Yellow (signal).
- Versatile Applications: Suitable for hand sanitizer dispensers, water dispensers, aroma diffusers, aquariums, and more.
- Use in Dry Environments: Designed for dry, moderate-temperature environments for optimal performance and longevity.
Specifications
| Product Name | Capacitive Liquid Level Sensor |
| Operating Voltage | 3.3V – 5V |
| Wire Type | Sheathed Wire (Red / Black / Yellow) |
| Detection Method | Non-contact, capacitive through plastic wall |
| Function | Water shortage reminder / Full water reminder |
| Compatible Tanks | Plastic water tanks (does NOT detect pure alcohol or gas) |
| Environment | Dry, avoid high-temperature conditions |
| Package Includes | 1 × Capacitive Liquid Level Sensor |
| Country of Origin | Made in China |
Wiring Guide
- 🔴 Red Wire — Positive (VCC)
- ⚫ Black Wire — Negative (GND)
- 🟡 Yellow Wire — Signal Output
Important Notes
- This sensor must be used close to the outside surface of a plastic water tank.
- It cannot detect pure alcohol or gasoline.
- Use only in dry environments; avoid high temperatures.
- Due to manual measurement, please allow a tolerance of 1–3 mm.
- Actual product color may vary slightly from images due to monitor display differences.
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Frequently Asked Questions
Q: Can this capacitive liquid level sensor detect any type of liquid?
A: This sensor is designed to detect water and most water-based liquids through plastic tank walls. It cannot detect pure alcohol or gasoline. For best results, use it with standard water tanks or containers used in dispensers and diffusers.
Q: Does the sensor need to be submerged in the liquid to work?
A: No — that's one of its biggest advantages! This is a non-contact liquid level sensor, meaning it attaches to the outside surface of a plastic tank and detects the liquid level through the wall without any direct contact with the liquid.
Q: What microcontrollers is this sensor compatible with?
A: The sensor operates at 3.3V to 5V, making it compatible with popular platforms such as Arduino, Raspberry Pi, ESP8266, ESP32, and most other standard microcontrollers and development boards.
Q: How do I wire this sensor correctly?
A: Wiring is straightforward using the color-coded leads: connect the Red wire to VCC (positive), the Black wire to GND (negative), and the Yellow wire to your signal/input pin on your microcontroller or controller board.
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.