Dual technology detectors
The dual-technology detectors associates a passive infrared (PIR) sensor with a high-frequency microwave sensor with Doppler effect. The passive infrared detector detects temperature variations in its detection field during an intrusion.
As for tThe Doppler detector uses a microwave transmitter and receiver antenna that , it is all about a high-frequency transmission and reception antenna which transmits a pulse and analyses the signal reflected by the environment. The frequency differences between the signal transmitted and the signal received provide information about the moving objects in the detection area.