• Normally Closed (NC) Magnetic Contact
• Reliable Magnetic Reed Switch Detection
• Durable ABS Plastic Housing
• Surface Mount Easy Installation
• Compatible with Alarm & Security Systems
• Suitable for Doors & Windows
The DH-32 Wired Door Contact (NC) is a magnetic security sensor designed for alarm systems to detect the opening and closing of doors or windows.
The sensor includes two components – a magnetic reed switch and a magnet. When the door is closed, the magnet keeps the circuit closed. When the door opens and the magnet separates from the sensor, the circuit breaks and sends a signal to the alarm panel.
This model operates in Normally Closed (NC) configuration, which is commonly used in wired security alarm systems for reliable intrusion detection.
With a compact design and strong ABS casing, the DH-32 door contact is suitable for installation on wooden doors, aluminum doors, metal doors, and windows in residential and commercial environments.
Product Type: Magnetic Door Contact Sensor
Model: DH-32
Contact Type: NC (Normally Closed)
Operating Voltage: Up to 100V DC/AC
Max Switching Current: 0.5A
Max Power Load: 10W
Operating Gap: 15–25 mm
Material: ABS Plastic
Connection Type: Wired (2 Wire)
Installation Type: Surface Mount
Usage: Indoor
Application: Alarm & Security Systems
Home Security Systems
Burglar Alarm Systems
Access Control Systems
Office Doors
Window Security
Warehouses
Commercial Buildings
Smart Alarm Installations
Q1: What does NC mean in door contact sensors?
NC means Normally Closed – the circuit remains closed when the door is shut.
Q2: How does the DH-32 door contact work?
When the door opens and the magnet moves away, the circuit breaks and triggers the alarm.
Q3: Can it be used for windows?
Yes, it can be installed on both doors and windows.
Q4: Is it compatible with alarm systems?
Yes, it works with most wired burglar alarm and security systems.
Q5: Is installation complicated?
No, it is a simple surface-mount sensor installed using screws.
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