SW-520D Tilt & Vibration Sensor Module Kit for Arduino

SW-520D Angle Sensor Module – Ball Tilt & Vibration Switch Kit for Arduino

Take your electronics projects to the next level with the SW-520D Angle Sensor Module — a compact, easy-to-use tilt and vibration detection module designed for Arduino and other microcontroller development boards. Whether you're building interactive gadgets, motion-triggered alarms, or smart robotics, this sensor delivers reliable angular displacement detection in a tiny, low-profile package.

Made in Mainland China.

Key Features

• Model: HS-S21A | SW-520D Ball Tilt Switch
• Sensor Type: Inclination / Tilt Switch — Angular Displacement Sensor
• Working Principle: Ball-based angular displacement detection triggers a digital output signal when tilted beyond a threshold angle
• Output Type: Digital signal (High/Low) — easy to read with any microcontroller
• Compact Dimensions: 37 × 18 × 8 mm — fits neatly on breadboards and in enclosures
• Material: Durable polymer construction
• Arduino Compatible: Plug-and-play with standard 3-pin sensor headers
• No high-concern chemicals in materials

What's in the Box?

• 1× SW-520D Angle Sensor / Ball Tilt Vibration Switch Module (HS-S21A)

How It Works

The SW-520D uses a small conductive ball inside a cylindrical chamber. When the module is tilted past a certain angle, the ball rolls and completes (or breaks) the internal circuit, sending a clean digital signal to your microcontroller. This makes it perfect for detecting orientation changes, vibrations, knocks, and motion events — no complex programming required.

Perfect For

• Arduino & Raspberry Pi hobby projects
• STEM education and kit development boards
• Motion-triggered alarms and alerts
• Robotics orientation detection
• Vibration and impact sensing
• Anti-theft and security devices
• Interactive science fair projects

Specifications

Learn more: OSHA on personal protective equipment

Frequently Asked Questions

Q: Is the SW-520D tilt sensor module compatible with Arduino boards?

A: Yes! The SW-520D angle sensor module is fully compatible with Arduino, Raspberry Pi, ESP8266, ESP32, and most other 3.3V/5V microcontroller development boards. It outputs a simple digital signal that can be read directly with a digital input pin — no additional libraries required.

Q: What is the difference between a tilt switch and a vibration switch?

A: In practice, the SW-520D ball tilt switch can detect both orientation changes (tilt) and physical vibrations or impacts. When tilted beyond its trigger angle, the internal ball rolls to complete the circuit. Rapid vibrations or knocks cause the ball to bounce, producing a series of on/off signals — making it useful for both tilt detection and simple vibration sensing applications.

Q: What angle triggers the SW-520D sensor?

A: The SW-520D is sensitive to angular changes, typically triggering when tilted approximately 10–45 degrees from its resting position, depending on orientation. Because it uses a physical ball mechanism, sensitivity can vary slightly with mounting angle and vibration intensity.

Q: Do I need any special code or libraries to use this module with Arduino?

A: No special libraries are needed. Since the SW-520D outputs a standard HIGH or LOW digital signal, you can read it using Arduino's built-in digitalRead() function. Many beginner-friendly Arduino code examples are freely available online for tilt and vibration switch projects.

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.