Linear Heat Detection

Linesense Digital Linear Heat Detection cable is a simple and reliable product providing uninterrupted detection along its length.

The sensing cable is formed from a pair of twisted steel conductors each with temperature sensitive insulation and then an overall outer sleeve. When the temperature sensitive insulation reaches it’s predetermined alarm temperature the two conductors short together providing the digital alarm signal.

The cable can be connected to any unit capable of monitoring a switched or digital alarm signal, i.e. Conventional fire panel, addressable switch monitor unit or PLC. The fire detection capability can be enhanced when the LHD is used in conjunction with the Digital Location Interface (DLI).

LHD cable is classified as a “simple device” and so with the use of suitable Intrinsically Safe (IS) barriers to limit the energy to a safe level, it can be used in hazardous areas.

The LHD cable can be cut to length as required and with it’s ease of installation and low maintenance it provides a cost effective solution where project expenditure requires to be kept at a minimum.

Having a fixed alarm temperature, the operation of the digital LHD is unaffected by changes in the ambient temperature. The Linesense Linear Heat Detection cable has the widest range of Alarm temperatures 68ºC to 240ºC

Features

  • Simple switch / digital alarm operation
  • Continuous uninterrupted sensing along the total length of the element
  • Fixed alarm temperature. Unaffected by changes in ambient temperature
  • Compatible with switch monitoring units and conventional alarm panels
  • Suitable for use in Hazardous areas using safety barriers.
  • Widest range of alarm temperatures 68ºC to 240ºC
  • Simple maintenance free installation
  • Small diameter and bend radius
  • FM Approved

Applications

  • Conveyors / bearing protection
  • Escalators, moving walkways
  • Petro-chemical storage tanks, rim seal protection
  • Cable tunnel / tray protection
  • Road and rail tunnels
  • Road and rail motor compartments
  • Electrical switch gear & transformers
  • Refrigerated rooms and cold stores
  • Building fascia's, exteriors under eaves
  • Motor and pump overheat detection
  • Dirty and dusty environments.
 
Alarm temperature : 68°C (155ºF) Nominal
Max amb temperature : 45°C
Min operating temperature -40°C
Min installation temperature -15°C
Pt No. 51100-068  
 
Alarm temperature : 85°C (185ºF) Nominal
Max amb temperature : 45°C
Min operating temperature -40°C
Min installation temperature -15°C
Pt No. 51100-085  
 
Alarm temperature : 105°C (221ºF) Nominal
Max amb temperature : 70°C
Min operating temperature -30°C
Min installation temperature -0°C
Pt No. 51100-105  
 
Alarm temperature : 176°C (349ºF) Nominal
Max amb temperature : 105°C
Min operating temperature -49°C
Min installation temperature -0°C
Pt No. 51100-176  
 
Alarm temperature : 240°C (464ºF) Nominal
Max amb temperature : 200°C
Min operating temperature -50°C
Min installation temperature -20°C
Pt No. 51100-240  
 

See individual datasheets for further details.

 

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