Saturday, July 23, 2016

Continuous Emission Monitoring Systems

Custom CEMS
CEMS stands for "continuous emission monitoring systems" and are used to monitor the flue gas exiting to the atmosphere from a boiler, a furnace, or oven.

CEMS are installed by commercial and industrial plants to ensure compliance with the Environmental Protection Agency's requirement limiting the volume of harmful gasses (such as CO2) into the air.

CEMS take samples of the flue gas, and then measures, acquires data, stores records and produces reports of the gas emissions. CEMS may also provide additional information such as measuring and reporting the gas flow, its opacity and the gas moisture content.

CEMS usually have the same primary components, which are:
  • a sampling probe; 
  • a filter; 
  • a sampling line;
  • a process to condition the sample gas;
  • a calibration gas;
  • gas analyzers set to the gases being monitored.
The most common gases measured are:
  • carbon dioxide
  • carbon monoxide
  • airborne particulate
  • sulfur dioxide
  • volatile organics
  • mercury
  • nitrogen oxides
  • hydrogen chloride
  • oxygen
The US Environmental Protection Agency requires a data acquisition system and handling process to collect and report the data, which CEMS provides. CEMS must operate and provide data continuously in order to assure governmental compliance and meet record keeping requirements.

For further information on CEMS, contact:

Arjay Automation
1178 E. Cliff Road
Burnsville, MN 55337-1577
Phone (800) 761-1749