In the past year, the country has been put into operation the longest highway tunnel - a tunnel Shanxi Yanmenguan successful use of a new fire alarm system ---- Shanghai Boom AT Co., Ltd. to provide fiber-optic distributed temperature monitoring System, its successful operation has proven the superiority of the new system and a good technical system, the new system completely eliminates the probability of false positives, and its real-time temperature monitoring function for the leadership provided a better basis for decision making.

      Following is the scene in Yanmenguan collection to the temperature distribution graph: