The Anti-Intruder Welded Mesh Fence is built as per the CSE entry in the Perimeter Barriers chapter. The apertures are 75 mm vertical x 25 mm horizontal and the height of the fence fabric is 2.4 m (2.9m including three barbed strands). Each bay is 3 m in width and buried 300 mm into the ground. Two runs of sensor cable were attached, one each to the 1st and 18th strand from the top. The sensor cable is attached using 4 mm width black plastic cable ties every 150 mm.