What is a LHS System?
Introduction
Linear Heat Sensing (LHS) (also known as Linear Detection Wire or Linear Heat) is a very commonly used method of fire detection. It can detect a fire anywhere along the length of the cable, and can be of lengths in excess of a kilometer
Applications can range from building fire alarm systems to mobile plant machinery
Advantages :
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Simple in construction
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Controller complexity is low
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Controllers are available with distance location to the point of the fire, also with 4-20mA output
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Easily deployed
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Can cover a large area
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Small and Compact
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Supported by the majority of fire controller panels
Disadvantages :
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Slow response time - up to 30 seconds
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Lack of information about fire
FAQ's
LHS Cable is a smart sensing product aimed at providing early detection of fire or overheating in adverse environmental conditions within areas of limited access and surveillance. These unique cables and associated systems can detect heat anywhere along the length of the cable by detecting changes in temperature
Simple and easy-to-install, the LHS cable connects directly to the fire alarm panel initiating circuit. ... The heat from a fire causes the LHS cable's special insulation to melt at a specific temperature, allowing the two conductors to short together, thus creating an alarm condition on the fire control panel.