10Pcs RC-33 NC Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White

NC means Normally Closed:When the magnet together, the circuit is conductive( light on ); when the magnet separate, the circuit is not conductive ( light off ). When make order,pls check carefully! Actuation Distance: 15-25mm ; Max. Current: 0.5A; Max. Contact Power: 10W ; Max. Working Voltage: 110V; Contact Type: NC (Normally Closed) ; Material: ABS Package Content: 10pcs x Magnetic Door Switch These are the door contact sensors that are in use with any and all commercial or residential card access systems as well as all security burglar alarm system.

• 1. **【Recessed & Discreet Design】** Flush-mount installation seamlessly integrates with door/window frames, maintaining aesthetics while providing invisible 24/7 security monitoring for homes or offices.
• 2. **【N.C. (Normally Closed) Fail-Safe Mechanism】** Magnetic reed switch triggers instant alarm when doors/windows are unexpectedly opened, with Normally Closed circuit design to prevent tampering or false alerts.
• 3. **【Wired Reliability, Zero Signal Delay】** Hardwired connection ensures stable real-time communication with security systems (compatible with most alarm panels), eliminating wireless interference risks.
• 4. **【Durable for Indoor/Outdoor Use】** Weather-resistant white housing (IP54 rated) and corrosion-resistant contacts ensure long-term performance in extreme temperatures (-20°C to 70°C).
• 5. **【10-Pack Value Set】** Cost-effective bulk bundle for multi-entry protection—secure front/back doors, garage, balcony, and windows with unified RC-33 sensors.