CEMS: Continuous Emission Monitoring Systems

Emissions, process and air quality monitoring to avoid potential fines and penalties

CEMS: Continuous Emission Monitoring Systems

Continuous Emission Monitoring Systems (CEMS) solution is proven to meet complex regulations worldwide, including Swiss OAPC, US EPA part 60/75, EN 17255, KSA RCER and PME, Alberta CEMS code, and Canadian 1/EPS/PG7. AML- CEMS is a powerful and robust software application package that can store, analyze, visualize and report environmental data from various sources. The main goal of Continuous Emission Monitoring Systems (CEMS) is to demonstrate environmental regulatory compliance of various industrial sources of air pollutants. The main pollutants measured by a Continuous Emission Monitoring System include carbon monoxide (CO), carbon dioxide (CO2), sulphur dioxide (SO2), nitrogen oxides (NOx), hydrogen chloride (HCI), volatile organic compounds (VOCs), ozone (O3) and heavy metals such as mercury (Hg).

CEMS can also be set up to monitor other parameters of a site’s flue gas effluent in order to reveal insights into its day-to-day functioning. These include such variables as the airflow in the sample. These data can help to produce readings of contamination concentration on a mass per hour basis. 

AML-CEMS helps your company manage environmental audit risks, save time with maintaining the CEMS analyzers and preparing regulatory reports, and significantly assist with environmental accountability and compliance as part of the corporate sustainability policies and procedures.


Most common challenges with analyzers:

  • Compliance
  • No confidence in analyzer readings
  • Root causes of unplanned downtimes are not analyzed
  • Human errors derived from manual coordination
  •  Communication between maintenance and operations
  • Low availability rate of analyzers
  • Invisible analyzer performance
  • An increasing number of sensors
  • A decreasing number of specialists (Subject Matter Experts) 

Challenges managing limits on emissions

Air pollution is one of the biggest problems faced today. To meet the requirements and standards, it’s essential to measure the emissions. But how do you know what your smokestack is releasing into the atmosphere? That is a big challenge for many companies. Also, there are other challenges like: 
  • Ever-changing regulatory standards
  • Technology options
  • A significant percentage of Continuous Emission Monitoring Systems (CEMS) rely on obsolete or discontinued systems.
  • The EPA mandated 95% availability means systems can only be down 18 days per year.
  • Emission estimating and reporting
These regulations and challenges are often complex and hard to navigate, and companies that fail to meet them can face severe penalties and fines. 

Benefits of Continuous Emission Monitoring Systems (CEMS)

Ease of Use

The user interface allows for ease of use, complete customization to help you quickly find the correct data and generate reports.


Eliminate single points of failure with a distributed architecture and ensure data availability.

Improve maintenance

Monitor health status, alarms, notifications, and trigger maintenance procedures. An excellent tool for preventive maintenance and reducing downtime

Scalability and Expandability

Transmitting all the analog and digital channels over the TCP/IP network significantly increases scalability and expandability.


Save money on PLC unit, programming, cabinet space, and long-term maintenance.

Improve maintenance

A standardized way to connect people, processes, and technology with a consistent interface.

Unique Features of Continuous Monitoring Systems (CEMS)

  • Latest cybersecurity practices for network communication, data acquisition, storage, and analysis, are an integral part or independent from the plant network.
  • All calibration and value processing features of DCU, plus:
  • Additional reports
  • Operating time and data availability
  • Standardization to normal conditions
  • Mass rate calculation and reporting
  • Alarm acknowledgments
  • Alarm reasons and actions
  • Support for parameter values
  • Support for bias value parameters
  • Security and multi-level user access control
  • System audit log capabilities
  • Solenoid control capabilities 
  • Full system backup and restore
  • Scheduling for an automatic report of control tasks
  • Support for multiple database engines
  • Data backfilling and missing data subsite

Get Quantified Results with Hint's CEMS

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reduction of capital costs

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Reduction of operation and maintenance costs

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Increase the availability of the data

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Reduction of environmental footprint