Because fiber is immune to electromagnetic interference, it's ideal for buildings with high electrical noise, long cable runs, or strict reliability requirements—especially in modern fire alarm and integrated security systems. Distributed fiber optic sensing, particularly Distributed Temperature Sensing (DTS), is a highly effective technology for monitoring large or linear assets. Its ability to provide continuous temperature readings over long distances makes it an ideal solution for fire detection in tunnels. The first UL flame-listed optical cable designed for both indoor and outdoor use in critical communication and emergency systems that must remain operational during a fire. Fiber-optic cables carry data as pulses of light instead of electrical currents. If cables are installed in air ducts or plenums, the cable is to be fire re stant and have low smoke.
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