SW420 Tilt Ball switch 2801 ball sensor (Tilt Sensor)

The SW-420 Tilt Ball Switch (also known as the 2801 ball sensor) is a compact, vibration-sensitive tilt sensor that uses a rolling metal ball to detect changes in orientation or motion. When tilted or shaken, the ball inside makes or breaks contact with internal electrodes, creating a simple digital ON/OFF signal. This sensor is widely used in DIY electronics, Arduino projects, and security systems where detecting motion, tilt, or vibration is needed. It's low-cost, passive (non-powered), and easy to interface with microcontrollers.

Features

• Simple ON/OFF digital tilt or vibration detection

• Works by internal rolling ball making electrical contact

• No power supply required – passive device

• Fast response to tilt and vibration

• Can be used in any orientation

• Durable metal and plastic housing

• Easy to interface with microcontrollers like Arduino, ESP32, etc.

• Ideal for anti-theft alarms, orientation detection, and motion-triggered systems