Automated Control Systems Inc. (ACS) is an industry environmental leader in Continuous Emissions Monitoring Systems (CEMS) and Continuous Opacity Monitoring Systems (COMS). ACS has over 300 CEMS/Opacity monitoring systems operating in the United States. We can monitor TRS, O2, CO, CO2, NOx, SO2, etc. We also provide reporting and data historian using our ACS DAHS.