Z-Wave Plus U-Fairy G. R. Door/Window Detector

The Door sensor adopt design which will save the power. When the door is close, it does not transmit radio signals. And the power consumption of only a few microamps. At once the door is open, it will launch a wireless alarm signal in about 1 second immediately , then stop itself. The door sensor won’t send any signal even the door is opened . This is to prevent the battery not to run out and keep running if the transmitter sending the information continuously . The door sensor detector is usually installed on the inside of the door. it consists of two parts. One is the small component with permanent magnet with a permanent magnet inside .It is used to produce a constant magnetic field. The bigger one is the magnetometer detector,the main part. It has an internal open type magnetron. When the permanent magnet and magnetron approach to very close distance, less than 5 mm, the, door magnetic detector will turns to standby status. When the permanent magnet leaves from magnetron with a certain distance, the door sensor will launch 868.42MHZ ,the wireless signal immediately. According to the wireless signal , The controller can identify which door sensor is sending the alarm information.