Perimeter protection is one of the most effective ways to prevent an intruder. A more secure system is one that alerts the user of the presence of an intruder, before they can break into the property. It’s a simple idea, but fitting an external detector comes with challenges.  Install the brand-new XDL12TT-AM and provide up to 12m premium and robust pet-friendly external detection.  Consisting of two independent Passive Infrared (PIR) sensors and one microwave sensor, the Tri-Technology (TT) of the XDL12TT-AM utilises Tri-Signal Detection Logic to identify the presence of an intruder. This provides reliable and stable external detection as all three sensors must be activated sequentially in quick succession to create an alarm. This enhances the detector’s immunity to environmental disturbances and limits the risk of false alarms.  With Dual-Vision Pet Immune Technology, each PIR sensor of the XDL12TT-AM has its own dedicated volumetric field of view. The top PIR detects outwards and up, while the bottom PIR detects outwards and down, without overlapping. This setup, alongside Tri-Signal Detection Logic, delivers highly secure sequential detection and increases its tolerance to p...