Wireless gate magnet is composed of two parts of the wireless transmit module and magnetic block, in the wireless transmission module has two arrows there is a "steel reed" components, When the distance between the magnet and the steel reed is maintained within 1.5 cm, the steel reed is in a disconnected state, and once the distance between the magnet and the steel reed is more than 1.5 cm, the steel reed will close, causing a short circuit, and the alarm indicator will be lit to send an alarm signal to the host.
Wireless door magnetic wireless alarm signal can transmit 200 meters in open field, can transmit 20 meters in a general residence, and the surrounding environment is closely related. Wireless door magnet generally uses power-saving design, when the door closed it does not emit radio signals, at this time only a few micro-amp, when the door is opened instantly, immediately emit about 1 second of wireless alarm signal, and then stop on its own, then even if the door has been open will not emit a signal.
Wireless door magnet also designed a battery low voltage detection circuit, when the battery voltage is less than 8 volts, the LP light-emitting diode below will light up, then need to immediately replace the A23 alarm dedicated battery, otherwise it will affect the reliability of the alarm.
Wireless door magnetic sensor is generally installed on the inside of the door above, it consists of two parts: the smaller part is a permanent magnet, the inside has a permanent magnet, used to produce a constant magnetic field, the larger is the wireless door magnetic body, it has a normally open type of reed, when the permanent magnet and reed close (less than 5 mm), The wireless door magnetic sensor is on standby.
When the permanent magnet leaves the reed a certain distance, the wireless door magnetic sensor immediately emits a 315MHZ high-frequency radio signal containing the address code and its own identification number (i.e. the data code), the receiving board is by identifying the address code of the radio signal to determine whether it is the same alarm system, and then according to its own identification code ( That is, the data code), determine which wireless door magnetic alarm.
