Magnetic Door Contact Reed Switch NC 10-Pack | Security Sensor
Magnetic Door Contact Reed Switch NC 10-Pack | Security Sensor
Magnetic Door Contact Reed Switches – 10-Pack (Model RC-31)
Keep your home, office, or facility secure with these reliable Normally Closed (NC) Magnetic Door Contact Reed Switches. Each switch is magnetically actuated — when the door or window closes, the circuit stays connected; when it opens, the circuit breaks and triggers your alarm or access control system. Simple, dependable, and easy to install with a screw-mount design.
Key Specifications
- Model: RC-31
- Output Type: NC (Normally Closed) — connects when magnet is near, disconnects when magnet moves away
- Actuation Distance: 16 mm ± 5 mm
- Maximum Voltage: 100V DC
- Maximum Current: 300 mA
- Life Expectancy: Up to 1,000,000 actuations
- Mounting: Screw-mounted for quick and easy installation
- Package Contents: 10 pairs (10 sensor units + 10 magnets)
Why Choose These Reed Switches?
- ✅ Versatile Compatibility — Works seamlessly with most alarm systems, access control panels, and home automation setups
- ✅ Durable Construction — Rated for over one million actuations for long-lasting, worry-free performance
- ✅ Easy Installation — Screw-mount design means no special tools required; ideal for doors and windows in homes and factories
- ✅ Bulk Value — 10 pairs included so you can secure multiple entry points in one purchase
- ✅ Low Power Draw — Minimal electrical load makes these perfect for battery-backed security systems
Ideal Applications
These magnetic contact switches are perfect for:
- Residential doors and windows (homes, apartments)
- Commercial and factory entry points
- DIY alarm and access control projects
- Home automation integrations
- Cabinet and drawer monitoring
Made in Mainland China.
For guidance on home security best practices, visit the U.S. Consumer Product Safety Commission (CPSC) for safety standards and resources.
Frequently Asked Questions
Q: What does "NC" (Normally Closed) mean for a magnetic door contact reed switch?
A: A Normally Closed (NC) reed switch means the circuit is closed (connected) when the magnet is in proximity to the switch. When the door or window opens and the magnet moves away, the circuit opens (disconnects), sending a signal to your alarm or access control system. This is the most common configuration for security applications.
Q: What alarm and access control systems are these magnetic reed switches compatible with?
A: These RC-31 magnetic door contact switches are compatible with most standard wired alarm panels, access control systems, and home automation controllers that support NC sensor inputs. Check your system's specifications for 100V DC maximum voltage and 300 mA maximum current to ensure compatibility.
Q: How do I install these magnetic door contact reed switches?
A: Installation is straightforward. Use the screw-mount design to attach the sensor body to the door frame and the magnet to the moving door or window. Align the two components so they face each other when the door is closed. Connect the sensor wires to your alarm panel's NC input terminals. No special tools are required.
Q: How many switches are included in this package?
A: This listing includes 10 pairs — that is, 10 sensor switch units and 10 corresponding magnets — giving you enough to secure up to 10 doors or windows in a single purchase.