10-Pack Reed Magnet Door & Window Contact Sensor Alarm NC/NO
10-Pack Reed Magnet Door & Window Contact Sensor Alarm NC/NO
10-Pack Reed Magnet Door & Window Contact Sensor Alarm
Keep your home, garage, or business more secure with this 10-pack of wired reed magnet contact sensors. Designed for doors, windows, and garage entryways, these sensors trigger an open-loop alarm signal whenever a door or window is opened — giving you instant awareness of unauthorized or unexpected entry. Made in Mainland China.
Why Choose These Contact Sensors?
- Dual-Mode Operation: Supports both Normally Closed (NC) and Normally Open (NO) configurations — activates when the magnet moves away, deactivates when it approaches.
- Durable ABS Construction: Built from high-quality ABS plastic that resists high temperatures and deformation for long-lasting reliability.
- Versatile Applications: Perfect for door/window alarm systems, low-power switching, LED switching, and general door/window contact detection.
- Generous Wire Length: Each sensor comes with 300mm of wire, giving you flexible installation options.
- Wide Compatibility: Supports up to 0.5A current, 100V, and 10W — compatible with a broad range of alarm and automation systems.
- Reliable Detection Range: Induction distance of 20–30mm ensures accurate, consistent triggering.
- Value Pack: Get 10 sensors in one purchase — ideal for outfitting an entire property or keeping spares on hand.
Technical Specifications
| Model | RC36 |
| Material | ABS Plastic |
| Color | White |
| Wire Length | 300mm |
| Maximum Current | 0.5A |
| Maximum Voltage | 100V |
| Maximum Power | 10W |
| Induction Distance | 20–30mm |
| Type | Normally Closed / Normally Open |
| Quantity | 10 Pieces |
| Country of Origin | Made in Mainland China |
Ideal Use Cases
- Garage door monitoring
- Window and door security alarm systems
- Smart home automation triggers
- Low-power switching circuits
- LED indicator switching
For more information on home security sensor standards and best practices, visit the U.S. Consumer Product Safety Commission (CPSC) for consumer safety guidance on electronic devices.
Learn more: Security alarm
Frequently Asked Questions
Q: What is the difference between Normally Closed (NC) and Normally Open (NO) on these reed contact sensors?
A: In Normally Closed (NC) mode, the circuit is closed (connected) when the magnet is near the sensor, and opens (triggers) when the magnet moves away — such as when a door opens. In Normally Open (NO) mode, the circuit is open when the magnet is near and closes when the magnet moves away. You can configure these sensors in either mode to suit your specific alarm or automation system.
Q: Are these sensors compatible with standard home alarm systems?
A: Yes. These wired reed magnet contact sensors are compatible with most standard wired home alarm panels, DIY security systems, and automation controllers that accept NC/NO contact inputs with ratings up to 0.5A, 100V, and 10W.
Q: How far apart can the sensor and magnet be for reliable detection?
A: These sensors are rated for an induction distance of 20–30mm. For best results, install the sensor and magnet so they are within this range when the door or window is closed, ensuring reliable triggering when the gap increases beyond 30mm upon opening.
Q: Can these sensors be used outdoors or in a garage environment?
A: These sensors are made from temperature-resistant, deformation-resistant ABS plastic, making them well-suited for garage and indoor entryway environments. For exposed outdoor use in harsh weather, additional weatherproofing or protective housing is recommended.