The AD68N-0500 is a Digital Linear Heat Detection (LHD) cable with a 68°C (155°F) fixed temperature activation rating. It has a nylon outer sheath for UV protection and increased durability for external applications and is supplied in 500m lengths. 

The AD range of digital sensor cables provides 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 occurred. 

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 then 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 ie, conventional detection zone or addressable interface unit. 

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