The main application of LHD (Linear Heat Detection) is source detection, meaning the early detection of a heat source. An LHD is a thin cable that can be laid in long sections throughout, for example, a factory, alongside potential heat sources, such as electric motors, compressors, loading stations, electrical distribution panels, cable ducts, etc.
Because LHDs are not sensitive to dust, dirt, moisture or chemicals, they do not give false alarms and the maintenance costs are kept to a minimum. LHDs are available as a digital cable (Protectowire) and a fibre-optic cable that measures temperature fluctuations over its entire length.
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Fiber Optic Linear Heat Detection
Glas fibre detection is a revolutionary way of measuring exact temperature with help of a glas fibre detector. The reflected signal from the laser that is sent by the glass fibre is temperature sensitive and provides a precise temperature measurement on each point of the detector. With the supplied controller the detector can be devided into 256 zones and alarm criteria can be programmed per zone such as min/max temperature, rate of rise, deviation of an average etc. The system is perfectly suitable for buildings with explosion safe equipment such as chemical factories, refineries and tank terminals. Direct controlling from the fire fighting system is possible. The maximum length of 8 km offers a flexible and affordable detection device.
