Non-Contact Capacitive Water Level Sensor 3.3V–5V
Non-Contact Capacitive Water Level Sensor 3.3V–5V
Non-Contact Capacitive Water Level Sensor – 3.3V to 5V
Monitor liquid levels without ever piercing your container. This compact capacitive water level sensor detects liquid through the wall of a plastic tank, making it ideal for DIY electronics projects, automated dispensers, aroma diffusers, and more. Simply attach it to the outside of your tank and let the sensor do the work — no drilling, no leaks, no mess.
Key Features
- Non-contact detection — mounts to the outside of plastic tanks; no direct liquid exposure
- Wide voltage compatibility — operates at 3.3V to 5V, suitable for Arduino, Raspberry Pi, and other microcontrollers
- Dual-function alerts — triggers low-water (water shortage) or full-water reminder signals
- Simple 3-wire connection — Red (positive), Black (negative), Yellow (signal)
- Sheathed wire leads for durable, tidy installations
- Plastic housing — lightweight and easy to mount
- Made in Mainland China
Specifications
| Operating Voltage | 3.3V – 5V DC |
| Detection Method | Capacitive (non-contact) |
| Wire Type | Sheathed wire (Red / Black / Yellow) |
| Material | Plastic |
| Package Contents | 1 × Capacitive Liquid Level Sensor |
Compatible Applications
- Hand sanitizer dispensers
- Water dispensers & coolers
- Aroma diffusers & humidifiers
- Aquarium water level monitoring — see our 5-Pack Aquarium Suction Cup Clips – Tube & Heater Holders
- Arduino / Raspberry Pi DIY automation builds
- Any plastic-walled liquid container requiring level monitoring
Important Usage Notes
- Designed to work through plastic tank walls only — not suitable for metal containers
- Cannot detect pure alcohol or gasoline
- Use in a dry environment; avoid direct liquid submersion
- Avoid exposure to high temperatures
Looking to expand your electronics toolkit? Check out our Non-Contact Capacitive Water Level Sensor 3.3V–5V listing for bundle options, or pair with the 50Pcs Nickel Sheets for 18650 Battery Spot Welding Tool for your next DIY power project.
Learn more: OSHA on personal protective equipment
Frequently Asked Questions
Q: Can this capacitive water level sensor work through glass or metal tank walls?
A: No — this sensor is designed to detect liquid through plastic tank walls only. It uses capacitive sensing, which does not penetrate glass or metal surfaces effectively. Always mount it flush against the outside of a plastic container for accurate readings.
Q: What microcontrollers or boards is this water level sensor compatible with?
A: This sensor operates at 3.3V to 5V, making it fully compatible with popular platforms such as Arduino, Raspberry Pi, ESP8266, ESP32, and similar development boards. Simply connect the red wire to power (VCC), black to ground (GND), and yellow to a digital input pin to read the signal.
Q: Does the sensor need to be submerged in water to work?
A: No — that is the key advantage of a non-contact capacitive sensor. It attaches to the outside of your container and detects liquid through the wall without any direct contact with the liquid itself, keeping the electronics completely dry and safe.
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.