Linear Heat Detection


wire detail




Fike's Linear Heat Detection (LHD) is a versatile and economical fire detection product. Designed for use in a wide variety of fire and heat detection applications, Fike's LHD cable is particularly suited for harsh environmental conditions, where maintenance access is in a physical or hazardous area, and/or where there is a requirement to cost-effectively install fire detection in close proximity to the hazard. 







Fike's Linear Heat Detection cable is a combination of advanced polymer and digital technologies that can detect heat conditions anywhere along the length of the cable. The cable is comprised of two tri-metallic conductors individually insulated with a heat sensitive polymer outer-layer, and engineered to break down at specific fixed temperatures. This allows the twisted conductors to make contact and initiate a fire alarm condition at the control panel, without any calibration for changes in the ambient temperature. Nor is it required that a specific length be heated in order to initiate a fire alarm, adding to the versatility of this unique product. 



Alarm Point Location Setup
Each Protectowire zone is field calibrated after installation to eliminate copper feed cable resistance from the Alarm Point Location reading. This is done by manually shorting the detector at the beginning of the zone and adjusting the display to zero "0000".
Protectowire Linear Heat Detection Zone

Alarm Point Location 
When an overheat (alarm) occurs in a zone, an alarm point reading is taken either *manually or *automatically at the control panel. This reading represents the linear distance to the actuated point along the detectors length.


For further flexibility, Fike's Linear Heat Detection cable can be utilized with fire alarm control panels by utilizing either addressable monitor modules on an intelligent system, or by connecting the cable directly to the detection circuit of a conventional fire detection and control panel. In addition, the distance locating option allows the control panel to identify and display the exact location, in feet or meters from the fire panel, where the heat source interacted with the linear heat detection. That's a tremendous amount of valuable information in a small, easy to install and maintain fire detection package! 


  • Easy installation and maintenance
  • Minimal false alarms
  • Provides hazard coverage at every point on the cable for maximum protection
  • Compatible with Fike intelligent and conventional detection and fire alarm panels
  • Available in a variety of lengths, cable coatings and alarm temperatures for maximum flexibility


  • logo1
  • logo2
  • securitas
  • Fike
  • gamewell
  • cwsi
  • pyro_chem