27mm Normally Closed Reed Switch Magnetic Door Window Sensor NC Wired for Security Alarm System

Specifications  

• 27mm Normally Closed Reed Switch
• Switch Type: Reed Switch (Normally Closed – NC)  
• Size: Approx. 27.7mm x 14.3mm x 7.5mm (each part)  
• Material: Plastic housing with mounting holes  
• Contact Type: Normally Closed (NC) – opens on separation  
• Cable: Pre-wired with 2-core cable (white wires, stripped ends)  
• Operating Distance: ~10-20mm gap detection (typical)  
• Max Voltage/Current: 100V DC / 0.5A (standard reed rating)  
• Lifespan: Millions of cycles  
• Compatibility: Alarm systems, security panels, microcontroller projects  
• Pack: 1 pair (sensor + magnet) 

Features  

1. Normally Closed (NC) configuration – circuit closed when magnet is near, opens when separated  
2. Compact 27.7mm x 14.3mm size with mounting holes for easy installation  
3. Wired with pre-attached cable (~30-50cm typical) for simple connection  
4. High-sensitivity magnetic reed switch for reliable detection  
5. Durable plastic housing – suitable for indoor/outdoor use  
6. Ideal for door, window, cabinet security alarms & anti-theft systems  
7. Compatible with most alarm panels, Arduino, Raspberry Pi projects  
8. No power required – passive magnetic operation  
9. Enhance your home or office security with the 27mm Normally Closed Reed Switch Magnetic Sensor from Dunia BD. This reliable NC type reed switch is designed for door and window monitoring – the circuit remains closed when the door/window is shut (magnet aligned), and instantly opens when opened, triggering alarms or notifications.  
10. Compact and easy to install with mounting holes and pre-wired cable, it fits seamlessly on most doors, windows, cabinets, or gates. Made with durable plastic housing, it’s suitable for both indoor and outdoor applications. Perfect for DIY security alarms, home automation setups, Arduino/Raspberry Pi projects, or integrating with existing alarm systems. No external power needed – purely magnetic operation for long-term reliability. Shop authentic sensors with fast delivery across Bangladesh from Dunia BD! 

What is the price of 27mm Normally Closed Reed Switch Heavy Duty Magnetic Door Window Sensor NC Wired for Security Alarm Gate Garage in Bangladesh?

The latest price of 27mm Reed Switch Normally Close in Bangladesh is  Price: ৳155.00 taka for 1 Piece. You can buy this product at better and cheaper price from our website and also you can visit our warehouse between work hours 10am to 8pm.

Buy 64mm Normally Closed Reed Switch Heavy Duty Magnetic Door Window Sensor NC Wired for Security Alarm Gate Garage in Bangladesh from online at Dunia.com.bd.

In Bangladesh, you can get original 27mm Reed Switch Normally Close From Dunia.com.bd . We have few collection of latest Sensor Switch to purchase. Order Switch Online at our website Or Visit our warehouse to get your product at lowest price.

FAQ  

1. What does NC mean in this reed switch? 
   Normally Closed – circuit is closed when magnet is near, opens when separated.
2. What is the size of the sensor?     
   Approximately 27.7mm x 14.3mm x 7.5mm.
3. Is it wired? 
   Yes, comes with pre-attached cable for easy connection.
4. How does it work?     
   Magnet on moving part (door), sensor on fixed part – separation breaks circuit.
5. Suitable for security alarms?   
   Yes, perfect for door/window alarm triggering.
6. Can I use it with Arduino?   
   Absolutely, simple digital input for detection.
7. What is the detection range?     
   Typically 10-20mm gap between sensor and magnet.
8. Is it durable?     
   Yes, plastic housing and reliable reed mechanism for long use.
9. Does it require power?     
   No, passive magnetic switch – no battery needed.
10. Where to buy in Bangladesh?     
    Available at Dunia BD with quick nationwide delivery.