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What is Linear Heat Detector Cable ? (MOST Simple Explanation)

Linear Heat Detection (LHD) (also known as Linear Detection Wire or Linear Heat Detection Cable or Linear Heat) is a very commonly used method of fire detection Linear Heat Detection (LHD) is a line-type form of fixed temperature heat detection used in common commercial and industrial environments. This linear cable can detect a fire anywhere along its entire length and is available in multiple temperatures. The cable is comprised of two zinc-coated spring steel conductors, individually coated with a heat-sensitive thermoplastic polymer engineered to melt at fixed temperatures. Within standard linear heat cables, alarms are activated when the two conductors touch, causing a short. This includes accidental activation, such as if a forklift damages an LHS cable and the two conductors make contact. Hence we use a 2oo2 logic.