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Flare Gas Analyzer for Flare Gas Monitoring

Best solution for refinery flare gas monitoring and subsequent sulfur dioxide (SO2) emissions as mandated by the EPA Rule 40 CFR 60, Subpart Ja

Our ATOM INSTRUMENT™ FGA-1000™ Flare Gas Analyzer is an online process analyzer utilizing patented Excimer UV Fluorescence (EUVF) Technology to measure Total Sulfur in refinery flare gas and subsequent sulfur dioxide (SO2) emissions as mandated by the EPA Rule 40 CFR 60, Subpart Ja.  

The FGA-1000 Flare Gas Analyzer has the highest dynamic measurement range of any commercially available analyzer, requiring only a single point calibration without the need for additional sample valves, calibration gases or system hardware. It provides complete TRS Data resulting in the total analysis of all sulfur compounds potentially present in flare gas streams, not just the analysis of a few selected sulfur compounds as with GC-type applications.  Certification or CGA (Cylinder Gas Audit) is seamlessly provided by the incorporated calibration switching configuration and corresponding software menus for easy compliance testing. In addition, the FGA-1000 process analyzer does not require installation in an enclosed shelter.

When flare gases are produced, they contain a mixture of hydrocarbons, water vapor, and other impurities. The FGA-1000 analyzer takes a small sample of the flare gas and passes it through a sample cell where it is exposed to an infrared light. The gases in the sample absorb the infrared light at specific wavelengths, and this absorption pattern is unique to each gas.


The FGA-1000 Flare Gas Analyzer measures the amount of infrared light that is absorbed by the gases in the sample and uses this information to identify the gases present and their concentration. The data obtained by the FGA-1000 analyzer can be used to optimize the operation of the flare, reduce emissions and improve efficiency.

In addition to measuring the composition of the flare gas, the FGA-1000 analyzer can also measure the flow rate and temperature of the gas stream. This information is critical in ensuring that the flare is operating properly and that emissions are minimized. The FGA-1000 Flare Gas Analyzer is a valuable tool for compliance with environmental regulations, as it provides accurate and reliable data on flare gas emissions.


  • Designed for High Concentration Flare Gas Applications
  • Single Calibration/Single Range (0-50% and up to 100%)
  • Seamless Integration with GC for EPA Ja Rule Compliance
  • Outstanding Repeatability
  • 50ppm SD or ±2% of the measured value
  • 25ppm SD with 5-min averaging or ±2% of the measured value
  • High Linearity
  • ±2% of full scale (Dynamic Range Dependent)
  • Designed for outdoor installation and use in harsh environments as may be required by the refining, gas processing, and other oil and gas industries


On December 2, 2023, the U.S. Environmental Protection Agency (EPA) revealed its conclusive regulation aimed at significantly slashing methane and air pollution emissions originating from oil and natural gas operations. This comprehensive final measure, spanning over 1,600 pages, encompasses enhanced and updated standards for methane and other air pollutants from new, modified, and reconstructed sources. Additionally, it provides emissions guidelines to aid states in formulating plans aimed at curbing methane emissions from existing sources.  Download the EPA Factsheet

For flare gas monitoring for compliance with regulations, our solutions include:

Stay ahead of the curve – Process Insights can help ensure your flare gas meets the latest environmental guidelines. We offer single-source, complete solutions for your process analysis needs that align with the regulations – all tailored to fit your budget.


  • Natural gas processing plants
  • Refineries
  • Petrochemical plants
  • Chemicals

These industries use the FGA-1000 Flare Gas Analyzer to monitor and optimize their production processes by measuring the quality and quantity of various components in their process streams.

Simplified Design Improve Reliability

Calibration and validation routines are seamlessly incorporated into our operation software. The analyzer has a very fast response time to process changes (within 1 cycle), ensuring proper process monitoring with fast-moving processes. The sample injection system design is simplified resulting in greater reliability and lower maintenance, for example, the sample valve only actuates once per cycle increasing lifetime. Finally, the analyzer results are insensitive to sample buildup or interference from oxygenates present in the sample stream.

Graphical User Interface (GUI)

The SLA software incorporates a user-friendly Graphical User Interface (GUI) designed to be both intuitive and easy to use.  All aspects of analyzer operation are accessible from the Main toolbar utilizing drop-down menu screens. The home screen displays 3 user selectable digital readout and analog bar graphs updated in real-time from the analysis. Run Cycle Status and current timed events are also refreshed in real-time. Major system control elements are also incorporated in this home screen. The calibrate menu allows complete control of calibration and validation processes, including manual, auto calibration, and validation sequencing. Analytical results acquired during these events may be inspected at any time prior to subsequent calibrations.  All other menu screens such as Timed Events, Detector, Analog Output, Digital 1/0 and System Alarm Settings, allow the user to easily monitor or make changes to all aspects of analyzer control and operation. The GUI software also includes user setup and password security, as well as graphics plotting of real-time analysis data and display of historical settings.

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