Graduates from Prof. Chong-Ook Park’s Lab, Kim, Youngjoon and Park, Jinsoo have developed new concept indoor environment complex gauge-“Hu:u” after starting their own business via founding company(EXSEN). The new gauge could automatically alert us to circulate the air inside of any confined space at proper time. The early days of EXSEN accompanied by the help as well as support from our Dept. and recently the company gained extensive support from academic-industrial cooperation in Hanbat National University. 10 years long period of unstinted hard work on NOX censor and CO2 censor made them eventually fulfill their dream by launching “Hu:u”, which was considered as the second group manufacturing complete gas censor product following Japan all over the world.