Many people may not know what the door magnetic alarm is. With the outbreak of the epidemic in recent years, the door magnetic alarm has been widely used in many places, and many families will choose to install the door magnetic alarm to protect their families.
Principle of intelligent door magnetic alarm.
The intelligent door magnetic alarm is mainly composed of a switch and a magnet. The switch is connected by a magnetic reed switch through a lead wire. It is shaped and packaged; The magnet part is encapsulated in a plastic or alloy shell by a magnet with corresponding magnetic field strength. When the two are separated or close to a certain distance, it will cause the switch to open, thus sensing the change of object position.