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Geoquip's Guardwire

For many years there have been designs and technologies which have attempted to emulate the detection capability of the Guardwire cable sensor. As Geoquip holds the patent for magnetic sensor cable design, all other systems have to use either co-axial or fibre-optic based sensor cable designs, both of which suffer from limited frequency response.

Firstly, the two conductor wires of the Guardwire cable sensor together with the detection electronics are in fact two pseudo-detection systems.This technique is called dual channel signal processing (DCSP) and means that the two most common types of attack to building walls and roofs, ie: impact attack such as hammering and sustained attack such as drilling - can be independently adjusted without compromising each other. This is a key limitation of other systems, where adjustment of one attack detracts from the other, as they occur at different frequency ranges on the same sensing circuit.

Secondly, the magnetic design of the cable sensor works on exactly the same electrical principles as a speaker, which enables self-verification of an alarm condition, via an audio output.

Superior performance of the system is achieved by using the GD Alpha magnetic cable sensor as a detection device. The sensor cable, designed for the sole purpose of intruder detection, is manufactured by Geoquip in the UK to ISO 9001 standards. Installations of Guardwire can be found at numerous intermational sites such as prisons, airports, military and government sites, petrochemical plants, military sites, goldmines, banks, docks and ports.

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