Chapter 2: Design and installation
Alarmline II Digital Linear Heat Sensor Cable Technical Manual 13
• Sensor cable fixing clips should be suitable for the environment and the
surface they are being fitted to. There is no requirement for the sensor cable
to be tensioned, however on straight runs it is recommended to support the
cable at a distance of 1 m to prevent sagging.
• When using metal fixing clips, protect the cable at the fixing points by using
the silicone sleeve around the sensor cable.
• The minimum bend radius for AD68, AD88, AD105, and AD185 sensor cables
is 50 mm (2 in.) or 63.5 mm (2.5 in.) for AD218 sensor cables.
For areas where ambient conditions are likely to be less than 0°C (32°F) the
minimum bend radius for AD68, AD88, AD105, and AD185 sensor cables is
100 mm (4 in.) or 127 mm (5 in.) for AD218 sensor cables.
• Sensor cable is supplied on drums of 100 m, 500 m, and 1000 m and can be
easily jointed to create the required sensor cable length.
• Do not paint the sensor cable.
• Where possible, fixing of the sensor cable should be the last stage in the
installation to prevent any damage to the cable during other installation tasks.
• Pull the sensor cable from the reel using a reel stand. Do not pull the cable off
the reel vertically as this may damage the cable.
Chemical resistance
Table 10: Chemical resistance comparison
PVC coating Nylon coating Polypropylene
coating
Silicone coating
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