Choose an electromagnetic lock when the installation needs powered access control that holds a door closed, with single-door and double-door options and features such as bond or door-status sensing. Choose a magnetic door contact when the system only needs to monitor whether a door is open or closed, such as with recessed or channel-mounted contacts connected to an alarm or access control panel.

Choose a holding force that matches the door’s size, weight, traffic level, and required security, with available options ranging from 600 to 1,800 pounds. Select a single-door magnet for one opening, a double-door magnet for paired doors, or a recessed or channel magnetic contact when you need door-position monitoring rather than a locking device.

Most electromagnetic door locks use 12 or 24 VDC power, with some models offering field-selectable or automatic dual-voltage operation, and installers should size the power supply for the lock’s listed current draw. Magnetic contacts typically connect to an alarm or access-control circuit using low-voltage wiring, with some models supporting 12 to 22 AWG conductors and contact ratings such as 30 VDC, 0.2 A, and 5 W.

Bond sensors monitor whether the magnet and armature maintain contact, while door status sensors report whether the door is open or closed. LED indicators provide a quick visual signal for power and lock status, helping technicians and security personnel identify a condition that may need attention.