A compact reed switch module that closes its circuit when a magnetic field is present. Inside the glass envelope, a pair of ferromagnetic metal contacts come together when a magnet is brought close, and spring apart when the magnet is removed — providing a simple, contactless switching mechanism.

Key Features

• Magnetic Activation – Closes circuit in the presence of a magnetic field
• Normally Open – Contacts are open when no magnet is present
• Compact Size – Mini form factor for easy integration
• No Power Required – Passive component, no operating current needed

Ideal For

• Door and window open/close detection
• Proximity sensing with magnets
• Security alarm systems
• Arduino and microcontroller input projects

Package Contents

• 1× Mini Reed Switch Module