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GeoZone 'A' Perimeter Security System
Installation Manual
5 Chain Link Fences
5.1 General
Chain-link fences represent the most widely used type of perimeter fence, on both new
and existing installations. Since they are so widely used, and in many cases will have
been installed before the perimeter intrusion system, the fences may be in less than
perfect condition. Therefore it is imperative that the site survey described in Section 2.1
is carried out prior to the sensor installation.
5.2 Fixing The Sensor
IMPORTANT
Never fix sensor to the strainer wires of chain-link fencing because
there is insufficient mechanical contact between the strainer wire
and the fence for the sensor to be able to detect vibrations occurring
on the fence itself.
When attaching sensor place the ties round the natural depression formed by the links
of the fence at the points where they fold over each other. By attaching the sensor at
every third such crossing the fixings will be the recommended 200mm apart, as shown
in Figure 11.
Figure 11
For more details on the sensor fixing procedure see Section 4.8.
Page 14
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