The AD68-0500 is a Digital Linear Heat Detection (LHD) cable with a 68°C (155°F) fixed temperature activation rating. It has a Standard PVC outer sheath making it suitable for internal applications and is supplied in 500m lengths. 

The AD range of digital sensor cables provide a very simple fixed temperature heat detection system which can be used in many applications where other forms of detection are not suitable. 

Additional to the LHD sensor cable, an optional digital location control unit which monitors the sensor cable and can identify along the length of the sensor cable where an alarm condition has occured. 

The AD range of digital LHD cables contains a pair of twisted, low resistance, tri-metallic conductors sheathed with advanced temperature sensitive polymers. The cable operates by softening the insulation of the conductors, the tension of the twisted conductors the causes the two cores to fuse together. The sensor cable provides a simple switch operation which when used with a combination of end of line (EOL) monitoring and alarm trigger resistors can signal an alarm to any fire monitoring equipment through any monitored input, i.e conventional detection zone or addressable interface unit. 

A range of edge 'A', 'P', and 'T' clips allow the cable to be properly installed. The clips provide heat insulation as well as holding the cable at the correct distance from cable trays, steel works, ceilings and walls.