
Linear Heat Detection (LHD) cables provide continuous, accurate temperature sensing along their entire length—ideal for tunnels, cable trays, warehouses, and other harsh or hard-to-reach environments.
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Linear Heat Detection (LHD) systems are designed for reliable fire detection in environments where traditional point detectors are ineffective or impractical. These systems use specialized heat-sensitive cables that detect temperature changes or fixed temperature thresholds anywhere along their entire length, triggering an alarm when conditions exceed safe limits.
LHD is especially suited for long-distance applications and harsh industrial settings, offering early detection of overheating or fire without the need for extensive infrastructure.
Continuous Coverage – Detects heat or fire at any point along the cable
Fixed Temperature or Rate-of-Rise Options – Supports specific detection needs
Durable Construction – Resistant to dust, moisture, chemicals, and vibration
Easy Integration – Works with standard fire alarm control panels (FACP)
Low Maintenance – No calibration or cleaning required
Precise Location Reporting – Digital LHD models pinpoint event location (optional)
Digital LHD Cables – Alarm when a preset temperature is reached
Analog LHD Cables – Measure temperature change over time
Zone Boxes & End-of-Line Terminations
Interface Modules for Fire Panels
Outdoor & Hazardous Area Rated Versions
Cable trays and conveyor belts
Electrical cabinets and switchgear
Tunnels and transportation systems
Parking garages and cold storage
Warehouses with high ceilings
Petrochemical and industrial plants
All LHD systems conform to key fire safety standards:
UL 521 / FM Approved
EN 54-28 – LHD fire detectors
ATEX / IECEx Certified (for hazardous locations)
CE Marked for EU installations
Long-range, low-cost fire detection
High reliability in dirty, wet, or vibrating environments
No moving parts or power needed at detection point
Scalable for small installations or multi-kilometer systems
Early warning reduces damage and downtime
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