Continuous Emissions Monitoring
Continuous Emission Monitoring involves extracting a sample from a stack and providing real time pollutant concentration data using gas specific Continuous Emission Monitors (CEMs).
The sample is extracted from the sample site using a probe, filter and heated line which are connected to a sample distribution system. The analyzers are calibrated before and after sampling as per EPA methodologies using EPA Protocol Calibration Gases accurate to 1%.
The typical gases monitored for CEM programs are:
- Oxygen (O2)
- Carbon Dioxide (CO2)
- Carbon Monoxide (CO)
- Oxides of Nitrogen (NOx)
- Sulphur dioxide (SO2)
- Total Hydrocarbons (THC)
CEM programs are performed to evaluate process performance and efficiency over time in addition to regulatory compliance requirements. Changes in process operation which effect emissions are indicated immediately by the CEM system. Simultaneous manual flow measurements provide flow data which are used to calculate the emission rates of contaminants. This enables you to monitor the impact operational changes have on emissions on a real-time basis.
For more detailed information on CEM programs, please contact: