Magnetic Reed Switch Door Contact Sensor

A reliable Magnetic Reed Switch Door/Window Contact Sensor — ideal for security systems, home automation, and Arduino/Raspberry Pi projects. The sensor consists of two parts: a reed switch unit with wired leads and a magnet. When the magnet is brought close to the switch, the circuit closes; when separated, it opens.

Key Features

• Two-part design: reed switch + magnet
• Normally Open (NO) operation
• Pre-wired with ~30 cm black leads for easy connection
• Mounting flanges with screw holes for surface installation
• Compact and durable plastic housing
• Compatible with Arduino, Raspberry Pi, ESP8266/ESP32, and alarm panels

Applications

• Door and window intrusion detection
• Cabinet or drawer open/close sensing
• Home automation triggers
• DIY security alarm systems

Specifications

• Color: Black
• Contact Type: Normally Open (NO)
• Wire Length: ~30 cm
• Operating Voltage: 5V–12V DC
• Housing Material: ABS Plastic