Linesense H8040N Digital LHD Cable

Code: 51100-068
  • 68°C, 155°F nominal
  • Ordered by the metre
  • Historic brand Kidde

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H8040N Linesense digital Linear Heat Detection (LHD) cable. Alarm temperature 68˚C, maximum ambient 45˚C. Black Nylon outer sheath. FM Approved.

The simple and proven technology of digital Linear Heat Detection (LHD) cable makes it a product of choice for demanding and challenging applications where other technologies struggle to work.

Its ease of installation and low maintenance also provides a cost-effective solution where project expenditure must be kept at a minimum.

The sensing cable is formed from a pair of twisted steel conductors, each with temperature-sensitive insulation and then an overall Nylon outer sleeve. When the temperature-sensitive insulation reaches its predetermined alarm temperature, the two conductors short together, providing the digital or switched signal.

The cable can be connected to any unit capable of monitoring a switched signal, i.e. Conventional fire panel, addressable switch monitor unit or PLC.

The nylon outer sleeve of the H8040N offers good chemical and water resistance, allowing it to be deployed in harsh and dirty environments.

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Additional information

Weight 0.09 kg


Alarm temperature: 68°C 155ºF
Max amb temperature: 45°C 113ºF
Min operating temperature: -40°C -47ºF
Min installation temperature: -15°C 5ºF
Time to detect small flame: 5 sec (Flame touching)


Cable diameter : 3.40mm ±0.15mm
Sheath colour: Black
Number of cores: 2
Core colours: Red and Black.
Core diameters: 1.5mm ±0.03mm
Conductor diameter: 1/0.9mm Tinned Copper Clad Steel (TCCS).
Minimum bend radius: 50mm (Cold store 100mm)
Weight: 18Kg/Km on the reel. (weight of reel typically 2Kg)


Resistance : 100 ohms / Km max @ 20°C
Capacitance: 45 pF/m to 130 pF/m
Inductance : 0.74 µH/m to 1.3 µH/m
Voltage rating: 110vdc 1 amp

Approvals: FM 3210

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