Magnetic Door Sensor Reed Switch – Door & Window Contact Sensor

Magnetic Door Sensor Reed Switch

Want to know when a door, window or drawer opens? This magnetic reed switch sensor comes in two parts: a switch and a magnet. When the magnet moves away, the switch changes state, and your Arduino, ESP32 or alarm system knows something has opened.

Key Features

• Two-piece design: a reed switch body and a matching magnet
• Wired sensor with lead wires, works like a simple on/off switch
• No power needed by the sensor itself
• Compact plastic housing, easy to mount with screws or double-sided tape
• Works with Arduino, ESP8266, ESP32, Raspberry Pi and alarm panels

Common Uses

• Home and shop security alarms
• Door and window open/close alerts
• Smart home automation, like turning lights on when a door opens
• Cabinet, drawer and gate status monitoring
• IoT and university projects

Tips

• Mount the magnet on the moving part (door) and the switch on the fixed frame, lined up closely.
• When connecting to a microcontroller, use a pull-up resistor (or the board's internal pull-up) on the input pin.

Package Includes

• 1 × Magnetic Reed Switch Sensor (switch + magnet)

Available with delivery across Pakistan, including Karachi, Lahore, Islamabad, Rawalpindi, Faisalabad and Peshawar.