Two Variants Available:
– NC magnetic reed switch
– NO/NC 3-wire universal contact
Heavy-Duty Metal Housing: Designed for industrial and commercial security applications.
Strong Magnetic Trigger Distance: Reliable detection even on large or heavy doors.
Secure Wired Communication: Ensures stable alarm signal with zero wireless interference.
Mounts to Metal Surfaces: Ideal for metal doors, shutters, gates, and industrial access points.
Works With Alarm & Access Systems: Compatible with panels, maglocks, relays, and controllers.
The DH-55 Metal Door Contact is a durable wired magnetic sensor designed for demanding security applications. It features a reinforced metal housing that withstands impact and stress, making it suitable for commercial entrances, warehouse doors, rolling shutters, gates, and industrial areas where plastic contacts fail.
Two wiring variations are available:
NC Contact – Circuit remains closed when door is shut and opens when door opens.
NO/NC 3-Wire Contact – Provides universal configuration to support both wiring needs using a single sensor.
The strong magnetic trigger ensures stable detection even with vibration or heavy metal doors. It integrates easily with alarm panels, access control systems, CCTV alarm inputs, and smart relay modules.
Designed for high-security environments, the DH-55 offers long-term reliability and dependable intrusion detection performance.
Model: DH-55
Contact Variants:
– NC magnetic contact
– NO/NC 3-wire universal magnetic contact
Housing Material: Metal alloy body
Wiring: Hard-wired terminal contact
Mounting: Surface mount for metal doors & frames
Applications: Industrial doors, shutters, gates, entry doors
Compatible Systems: Alarm panels, access controllers, relays, automation
Q: What is the main difference between NC and NO/NC 3-wire version?
A: NC supports Normally Closed only. The 3-wire model supports both NO and NC wiring for flexible installation.
Q: Can DH-55 be mounted on metal doors?
A: Yes, the metal housing and strong magnet are designed for metal door installations.
Q: Can it be connected to an alarm panel?
A: Yes, DH-55 works with most wired security alarm systems.
Q: Is this suitable for shutters and industrial gates?
A: Yes, DH-55 is ideal for heavy entry points and industrial sites.
Industrial shutter doors
Metal gates and warehouse doors
High-security entry monitoring
Access control systems
CCTV alarm integration
Smart relay automation systems
| Choose | NC, 3 WIRE (NO/NC), With L bracket |
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