Alarm Systems
metallic magnetic contact
metallic magnetic contact is a security device that monitors the status of doors, windows, or other access points by using a two-part system: a magnet and a reed switch, both encased in a durable metallic housing. When a door or window is closed, the magnet is close enough to the reed switch to activate it, completing or breaking a circuit depending on the configuration (normally closed or normally open)When the door or window is opened, the magnetic field is disturbed, the circuit is opened/closed, and a signal is sent to a security or alarm system.
Nationwide
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metallic magnetic contact
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- Reed switch: A glass-encased switch containing two thin, ferrous reeds. It is highly responsive to magnetic fields.
- Magnet: A permanent magnet mounted on the movable part of the door or window.
- Housing: A sturdy metal casing (often steel or aluminum) that protects the reed switch and provides durability and tamper resistance.
- Wiring: Two or more wires connect the contact to the security system. Some contacts may have additional wires for tamper monitoring.
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How it works
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- Closed state: When the door or window is shut, the magnet is close to the reed switch. In a normally closed (NC) system, the circuit remains complete. In a normally open (NO) system, the circuit remains broken.
- Open state: When the door or window is opened, the magnet moves away from the reed switch. This disrupts the magnetic field. For an NC system, the circuit breaks and triggers an alarm. For an NO system, the circuit completes and triggers an alarm.
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Electrical and mechanical specifications
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- Rated Voltage: Up to 100VDC100 cap V cap D cap C 100𝑉𝐷𝐶
- Rated Current: Up to 500mA500 m cap A 500𝑚𝐴 or 0.5A0.5 cap A 0.5𝐴
- Power Rating: Up to 10W10 cap W 10𝑊
- Switch Cycle Endurance: Over 100,000100 comma 000 100,000 cycles
- Connection Mode: Normally Closed (NC) or Normally Open (NO)
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Performance and design specifications
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- Sensing Distance: Typically 50−70mm50 minus 70 mm 50−70𝑚𝑚 or 1.9−2.71.9 minus 2.7 1.9−2.7 inches
- Material: Often zinc alloy or other durable, metallic materials to resist corrosion and for use on metal doors
- Cable/Wire: Often protected by a stainless steel hose or similar durable casing
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Applications
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- Residential, commercial, and industrial security: Used to monitor the status of doors, windows, and other access points to detect unauthorized entry.
- Tamper resistance: The metallic construction is more robust than plastic versions, making them suitable for environments where a higher level of security is required.
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