Key Features

  • UL 521 approved and compliant with the EN54:22 draft standard
  • Self-restorable analogue type system with optional pre-alarm setting
  • Cable based sensing allows detection at the point of risk
  • Low installation, maintenance and repair costs
  • Reliable solution for hazardous areas


The standard coating used on Analogue cables is made from PVC and is suitable for most environments. However, PVC should not be used when the cables are directly exposed to UV (sunlight) or hazardous chemicals (e.g. hydrocarbons) for long periods, or for applications where they may be exposed to regular mechanical abrasion.

Where the standard PVC is not recommended other materials/sheaths are available to provide a suitable solution.

Sensing Cable Construction

FyreLine Analogue Linear Heat Detection cable is constructed using a pair of copper conductors coated in a temperature sensitive polymer whose resistance changes as a function of temperature. A calibration resistance (white) and average ambient temperature sensor (red) core are also twisted with the two original conductors. A foil shield and protective outer coat is extruded over the twisted core.


The FyreLine analogue 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

Outer JacketHigh-Temperature Red PVC
Overall Diameter4.57mm ± 0.075mm (0.180” ± 0.003”)
Humidity0% to 99% RH
RFI ShieldingTwisted and foil shielding to reduce inductance and RF susceptibility
CoresCalibration Resistance: White
Sensor Core: Red
Conductor & Specially Doped Polymer Core: Clear
Conductor & Specially Doped Polymer Core: Clear
Maximum Continuous Length500m (1640ft)
Minimum Continuous Length30.5m (100ft)
Operating Temperature Range-40ºC to 125ºC
Continuous Ambient Temperature Range-40ºC to 90ºC



Analogue LHD Cable, PVC, 54°C – 100°C, UL, 100m

Contact Us

Analogue LHD Cable, PVC, 54°C – 100°C, UL, 200m

Contact Us

Analogue LHD Cable, PVC, 54°C – 100°C, UL, 500m

Contact Us