As with GPS, the PPS uses the same detection principle based on fluid filled tubes around the perimeter.
Using Advanced processing and timing techniques allow the system to resolve the intruder's point of entry down to a precision of 5 metres within any 200 metre zone.
The main features of these types of system is that they are invisible and can follow the local terrain and are able to function under many surfaces, therefore difficult for an intruder to locate.
Physical barriers are not required and the system is not constrained by "Line of Sight"
Visit the GPS Perimeter Systems Ltd website for more information on PPS