Dust and smoke emissions have for a long time been recognised as major atmosphere pollutants, particularly since such emissions from stacks are clearly visible to an observer. As there has been requirement by Department of Environment (DOE) for monitoring and quantifying these emissions, in June 2009, Chemsain has supplied the certified dust and opacity system with direct connection to State Department of Environment (DOE) for a palm oil mill company i.e. Regional Harvest Sdn. Bhd., which is located at Kalabakan, Tawau, Sabah. The said system is said not only to provide continuous measurement of accurate dust loading in the stack with direct connection to DOE but also a dynamic assessment of any miss-alignment errors that may occur due to stack movement. The system became operational since June 2009 and its operation has been satisfactory till present.