The Design of The Monitoring Tools Of Clean Air Condition And Dangerous Gas CO, CO2 CH4 In Chemical Laboratory By Using Fuzzy Logic Based On MicrocontrollerSlamet Widodo, M. Miftakul Amin and Adi SutrismanE3S Web Conf., 31 (2018) 10008DOI: https://doi.org/10.1051/e3sconf/20183110008