Key Features

  • UL 521 approved
  • Cable based sensing allows detection at the point of risk
  • Low installation, maintenance and repair costs
  • Reliable solution for hazardous areas
  • Low material cost


The High Temperature coated linear heat cable is manufactured from two different types of nylon, with the outer sheath being a chemical resistant material. Commonly used in high temperature areas, hazardous and safe areas where chemicals such as hydrocarbon fuel oils, diesel, kerosene etc. are present.

Sensing Cable Construction

FyreLine linear fixed heat sensing cable is constructed using two twisted and tensioned, tri-metallic conductors. Each of the conductive cables are coated in a heat sensitive polymer which, when heated to its rated temperature, melts, causing the two cables to touch. The resulting short sends a signal to the fire alarm control panel, indicating that a fire (or excessive heat) has been detected. Once a fire has been detected the damaged length of cable is easily replaceable.


The FyreLine digital linear heat detection cables are fully approved by the Underwriters Laboratories (UL) and bears the CE mark to show that they comply with all the applicable Directives including the CPR, EMC and the Low Voltage Directive (LVD).

  • UL 521
    Heat detectors for fire protective signaling systems.

Tech Specs

ConstructionOverall insulated, twisted pair of tri-metallic cores
Insulation1kV tested protective outer coat
ApprovalsCE Marked, UL Listed
Maximum Zone Length 3,000m (10,000ft)
Overall Diameter3.60mm ± 0.12mm (0.142” ± 0.005”)
Minimum bend radius50mm (2”)
Max Voltage Rating30Vac, 42Vdc
Resistance~100Ω/km (29Ω/kft) per leg
Velocity of Propagation~55%
Capacitance88 – 150 pF/m (26 – 45 pF/ft)
Inductance540 – 1050 nH/m (165 – 320 nH/ft)



Digital LHD Cable, Nylon, 185°C Alarm Temp, 100m

Contact Us

Digital LHD Cable, Nylon, 185°C Alarm Temp, 200m

Contact Us

Digital LHD Cable, Nylon, 185°C Alarm Temp, 500m

Contact Us

Digital LHD Cable, Nylon, 185°C Alarm Temp, 1000m

Contact Us