Linear heat detection (LHD) is a fire detection technology used to monitor heat along a continuous length of cable or wire. Unlike traditional spot detectors that detect heat at specific points, LHD systems provide early warning of fire or overheating conditions along a linear pathway, making them suitable for applications where precise detection coverage is required. LHD systems consist of a special cable or wire that contains heat-sensitive elements, such as insulated conductors or temperature-sensitive materials.
When exposed to elevated temperatures, these elements undergo a change in electrical resistance or other properties, triggering an alarm signal. LHD systems are commonly used in environments with challenging conditions or restricted access, such as tunnels, conveyor belts, cable trays, and industrial facilities. They offer reliable and cost-effective fire detection solutions, providing early warning of potential fire hazards and allowing for prompt response and mitigation efforts.
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