Compose System Portal

Home Ambient Air Emissions Vehicles Exhausts Flammables Study your System Gas Analyzers Dust Meters Sample Conditioning

Continuous Emission Monitoring Systems

Step #1: Please, choose the required system or fill in the questionnaire in the "Automatic Make Up of your Continuous Emission Monitoring System" section to get recommendations
Schematic of Dilution-Extractive Continuous Emission Monitoring System
Schematic of Extractive Continuous Emission Monitoring System (Cool - Dry)
Schematic of Extractive Continuous Emission Monitoring System (Hot - Wet)
Schematic of In-Situ Continuous Emission Monitoring System
If your need is periodic control by cheap portable instrumentation please choose the Portable Emission Monitoring System here: Schematic of Portable Emission Monitoring
If your primary need is control of dust (pm2.5, pm10, tsp or opacity of dust flow) please choose Monitoring System here: Schematic of Dust Monitoring System

Dilution-Extractive or Extractive Continuous Emission Monitoring System

i

In-Situ Continuous Emission Monitoring System

i

Automatic Make Up of your Continuous Emission Monitoring System

Under construction!

Primary Benefits of Extractive Systems:

  • Conducts measurements in a point
  • Gas analyzers, which are used in the system, are specially designed to control only one specific component resulting in balanced technical characteristics i.e. sensitivity, accuracy, interference to other components etc. are as a rule in compliance with the national requirements for emission rate control
  • Calibration is conducted in a conventional way with the help of gases in cylinders (approved worldwide for the most gases)
  • The system may be located in a pavilion in a workshop and includes a block of functioning control
  • The system is more safe
  • The system can be readily expanded. Other gas analysers or dust meters can be added more cost effective

Primary Benefits of In-Situ Systems:

  • Conducts measurements on path
  • Measurements on path (integral evaluation of gases content) are considered more representative for evaluation of emission rate control in stacks or ducts
  • Only one multi-components optical gas analyzer is used in a system as a rule, which is more convenient and less expensive in a maintenance
  • Calibration is conducted in a special way with the help of special standards. It is adopted that the concentration of a pollutant over the monitoring path would be equivalent to a much higher concentration of the pollutant contained in a short calibration cell inserted into the optical beam of an open path analyzer during a precision test or accuracy audit. So running-gas or sealed short gas cells or compliant internal calibration standarts can be used
  • No need of any pavilion or a room for the system location as a rule

Primary Limitations of Extractive Systems:

  • Requires sampling with a sample contact. Change of concentration of studied species in a sample is possible because of cross-reaction of components and/or adsorption
  • Requires calibration by gases in cylinders as well as requires manifolds, pumps, manometers, valves, control and test equipment for conducting frequent periodic system calibration
  • Slower response due to sample transit time
  • Generally more expensive especially in exploitation

Primary Limitations of In-Situ Systems:

  • Not so many components are approved to be controlled for an official presentation
  • Hard conditions (poor opacity) can influence on result and/or duration of measurements
  • Influence of interfering components on result of measurement is generally stronger for multi-components gas analyzers - In-Situ analyzers in our case




Privacy statement Using this portal means you accept its terms
© 2005 - 2018 Vitaly Beloborodov
Contacts: info@composesystem.com