Key Features

  • EN54-28:2016 approved
  • Up to 1,000m (3,280ft) per zone (when used with the FLDC-EN54)
  • Fixed sensitivity and detection along the entire length of sensor cable
  • UV stable and hydrocarbon resistant
  • CE marked


FyreLine Messenger Wire is available as an optional addition to any of the FyreLine EN54 Linear Heat Detection Cables. It is used to install FyreLine EN54 Fixed Linear Heat Detection Cable in areas which may be difficult to access, have large spans to cover or where fixing the cable at the normal recommended spacing (up to 1.5m / 5ft intervals) would be too difficult or time consuming.

FyreLine EN54 Fixed Linear Heat Detection Cable uses fixed temperature detection  technology to provide a simple method of sensing changes in temperature. It is suitable for a wider range of applications and environments such as tunnels, cable trays, warehousing, escalators and other applications where the risks of fire are hidden from view.

Cable Construction

FyreLine EN54 Fixed LSZH Cable with Messenger Wire comes with the messenger wire spiralled around the cable to make the detector cable self-supporting.

FyreLine EN54 Fixed Linear Heat Detection Cable is made up of two twisted cores that are separated by an advanced temperature sensitive polymer. When the temperature sensitive polymer reaches its rated temperature it softens, allowing the cores to come into contact. This is an irreversible process and once the cable has activated, the section which has triggered must be cut out and replaced.


EN54-28 is the European Standard for non-resettable line-type heat detectors that consist of a sensing element that uses electrical sensor cable. It specifies the requirements and performance criteria, and the corresponding test methods. This European Standard also covers non-resettable line-type heat detectors intended for use in the local protection of plant and equipment.

Please note: to comply with EN54-28, the FyreLine EN54 Fixed Controller, FyreLine EN54 Fixed EOL and FyreLine EN54 Fixed LSZH LHD Cable must be used as a complete system.

All products in the FyreLine EN54 range are approved for use within the European Economic Area (EEA) and comply with the EU’s New Approach Directives and show the CE mark to indicate that they fulfil the requirements of relevant European product directives, meet all the requirements of the relevant recognized European harmonised performance and safety standards and are fit for purpose and will not endanger lives or property.

Tech Specs

Product TypeNon-resettable Line-type Heat Detector
ConstructionOverall Insulated, Twisted Pair of Stainless Steel Cores
Insulation1kV Tested Protective Outer Coatings
Additional Insulation OptionsStainless Steel Over-braiding
ApprovalsEN54-28:2016, CE Marked, RoHS Compliant
Maximum Zone Length1,000m (3,280ft) (when used with FLDC-EN54)
Wire Overall Diameter5.72mm (0.225in)
Minimum Bend Radius)100mm (4”)
Max Voltage Rating49V AC, 74V DC
ResistanceApprox 1.25ohms Per Metre Per Core



Eurofyre is a global provider of specialist fire detection and associated safety products for commercial and industrial applications. The systems we manufacture, supply and promote are designed to give users time to respond to possible threats before the loss of critical infrastructure, high-value assets, business and, most crucially, life. Eurofyre has designed, supplied, delivered, and provided comprehensive training on linear heat detection systems for a huge variety of applications over the last fifteen years.

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