Five Pack Surface Mounted NC Magnetic Door Contact Sensors For Alarm Systems Easy Screw In Install Compact Modern Design Ideal For Doors And Windows Reliable Magnetic Switches That Trigger Alarm When The Magnet Separates

Five Pack Surface Mounted NC Magnetic Door Contacts
✔️ Compact ABS NC magnetic door contact, screw-in install, 5-pack

These five surface-mounted NC magnetic door contact sensors are ideal for securing doors and windows in home or small business alarm systems. They operate with a reed switch and magnet to detect when a door moves, triggering alerts when the magnet separates from the switch.

✅ Pack includes 5 pairs of door contacts
✅ White ABS plastic housing and slim profile
✅ Surface-mount screws in for secure mounting
✅ Normally closed NC magnetic contact switch for reliable alerts
✅ Suitable for doors and windows in basic alarm panels

💡 What is a door contact sensor and how does it work in a home security setup?
- It uses a reed switch paired with a magnet to monitor door position
- When the door is closed, the magnet keeps the reed switch engaged; opening breaks circuit and triggers alarm
- NC contact type means the circuit is complete when the door is closed
- This handy device is easy to mount on doors and windows and works with standard alarm panels