For highway tunnels, urban road tunnels and underpasses. Continuous temperature profiles reveal abnormal heating from vehicle or other tunnel fires and locate the alarm section. Follow the sequence from heat rise and device alarms to control-room location and integrated fire response, including the subsequent cooling trend.
DTS uses optical fiber as a continuous temperature sensor. Selected fire-suitable configurations up to 10 km and the fourth-generation 12 km configuration can apply the same sensing and installation principles to Fiber Optic Linear Heat Detection (LHD); alarm zones, thresholds, response, fault monitoring and fire-system interfaces must meet applicable fire-alarm requirements. Existing 20/30 km long-range and oil/geothermal versions are not intended for this fire application.