
Description:
Electromagnetic lock is composed of an electromagnet  attached to the door frame and an armature plate mounted to the door. When the  current passes through the silicon steel sheet, the electromagnetic locks will  generate powerful suction and tightly attract the armature plate in order to  hold the door shut. We provide CK 818 single door magnetic lock and CK 818  double door electromagnetic lock for customers to select. 
Unlike an electric strike, the magnetic door lock requires power to remain locked. Therefore the electromagnetic lock is suitable for panic and fire exit doors. Because the magnetic lock has no complex mechanical structure and lock tongue. Compared with the conventional door locks, the magneticdoor locks operate with less cost.
Operation:
  The magnetic lock operates on the basis of  the concepts of electromagnetism. The electromagnet attracting a conductor offers  sufficient power to prevent the door from being opened. In a more detailed examination,  the electromagnetic lock uses the current passing through one or more a  solenoid to produce a magnetic field. This works in free space, but if the  solenoid is wrapped around a ferromagnetic core such as soft iron, the effect  of the field will be extremely enlarged. 
Features  of Magnetic Door Lock:
  1.Compared with other locks, this magnetic  lock without interconnecting parts is easier to install.
  2.The electromagnetic lock will unlock immediately when the power is cut, allowing for quick release in  comparison to other locks.
  3.The magnetic door locks  may suffer less damage from multiple blows than that of conventional locks. If an  electromagnetic lock is forced to open with a crowbar, it will cause little or  no damage to the door or lock.