Infrared barriers include a transmitter located opposite a receiver. The transmitter emits infrared beams, invisible to the human eye, while the equipment receiving the infrared signals generates an alarm when the beams are interrupted.
The dual-technology detector uses a Doppler microwave signal and two passive infrared signals. Simultaneous detection by the two different technologies triggers the alarm.
Microwave barriers comprise a transmitter generating electromagnetic waves and a receiver, which detects and analyses the signal variation in the event of any movement or passage in the lobe of the detection zone.
The system uses a sensor cable attached to the fencing. It detects any vibrations and shocks produced on the structure, then transmits this data to the analyzer.