Surface-Mount Wired Magnetic Door & Window Switch NO/NC Security Reed Contact �
This Wired Magnetic Switch is a fundamental security component designed for reliable perimeter monitoring of doors and windows. Utilizing a precision-engineered reed contact mechanism, this switch detects the entry or exit of a magnetic field to trigger alarm systems, automation sequences, or access control logs.
Key Product Features
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Dual Operation Mode (NO/NC): Features a 3-terminal design that supports both Normally Open (NO) and Normally Closed (NC) wiring configurations, providing maximum compatibility with any security panel or DIY automation controller.
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Durable ABS Housing: Encased in a rugged, UV-resistant white ABS plastic shell that blends seamlessly with most modern door and window frames.
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Precision Screw Terminals: Equipped with three high-quality screw-down terminals that ensure a secure, low-resistance connection for signal wiring without the need for soldering.
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Easy Surface Mounting: Designed with integrated mounting flanges and pre-drilled holes for rapid installation using standard screws or high-strength adhesive tape.
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Low Profile Design: The slim, rectangular form factor allows for unobtrusive placement on window sills, door headers, or cabinet frames.
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Non-Contact Activation: Operates via magnetic induction, eliminating mechanical wear and tear for a long operational lifespan.
Technical Specifications
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Switch Type: Wired Magnetic Reed Switch.
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Circuit Type: 3-Wire (COM, NO, NC).
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Color: Signal White.
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Housing Material: Flame-retardant ABS.
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Terminal Type: Triple Screw Connector.
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Mounting Style: Surface Mount / Flange Mount.
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Application: Home security systems, smart home entry detection, industrial safety interlocking, and cabinet lighting automation.
Top 3 Customer Questions & Concerns �
� What is the difference between NO and NC in this switch?
This switch offers both options. If you wire it as Normally Closed (NC), the circuit is complete when the door is shut (magnet is present); if the door opens, the circuit breaks and triggers the alarm. Normally Open (NO) is the opposite—the circuit only closes when the door is opened, which is often used for turning on a light when a closet door opens.
How far apart can the magnet and the switch be?
For reliable operation, the gap between the switch and the magnet should typically stay within $10\text{mm}$ to $20\text{mm}$ when the door is closed. If the gap is too wide, the magnetic field won't reach the internal reed, potentially causing a false "open" signal.
� Can I use this for outdoor gates?
While the ABS housing is durable, this specific model is designed for indoor use. If used outdoors, it should be protected from direct rain and extreme moisture to prevent corrosion of the screw terminals, which are exposed for easy wiring.
