5 Pack NC Magnetic Door Sensor Contacts For Home Alarm System Surface Mount With Screw Terminals Wired Alarm Ready Easy Install Hides Screws No Brainer Great For Doors And Windows

Compact NC Magnetic Door Sensors 5-Pack for Alarm Systems
✔️ Surface-mount NC door contacts, easy install; screws included

These screw-terminal, surface-mounted magnetic door contacts are designed for wired alarm systems and access-control setups. They monitor door or window status using a reed switch and magnet, making them a simple, reliable choice for homes and small businesses.

✅ Pack: 5 pairs per bag
✅ Contact type: NC (normally closed)
✅ Operation gap: ≥ 20mm
✅ Max voltage/current: 28V DC, 0.2A
✅ Material/color: ABS plastic, white

💡 What is a surface-mounted NC magnetic door sensor used for in home security systems?

- Handy for detecting door or window status in wired alarm setups - Uses reed switch and magnet with NC (normally closed) operation - Easy to install on doors or windows with surface-mount screws