Global Analyzer Systems - Continuous Emission Monitoring Systems (CEMS)

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8 Deploys

24/7 emissions monitoring availability utilizing Global's ultra reliable CEMS ensuring compliance to local regulations.

Page last modified
May 16 2024

Global Analyzer Systems' state-of-the-art Continuous Emission Monitoring (CEM) System uses extractive dilution sampling technology for emissions sources (SO2, NOX, CO, CO2, O2, Total Reduced Sulphur (TRS) (CoS, CS2, H2S).

This system works by extracting a sample from the stack at a controlled, low flow rate and then mixing it with a high flow rate of diluent gas. This process reduces the sample's dew point sufficiently to enable the use of a freeze-protected sample transport line. The diluted sample is then conveyed to an analyzer rack at ground level, where the gas concentration is measured using an ambient range gas analyzer. The analyzer's output is scaled according to the dilution ratio to reflect the actual gas concentration.

Key Features and Advantages:

•  Stability and Reliability: The success of the CEM system stems from the stability of the dilution system, which uses a proprietary critical orifice and eductor in conjunction with the high stability of modern ambient air range analyzers.

•  Reduced Mechanical Failure: Global Analyzer Systems employs a pump-less analyzer system to further reduce moving parts and minimize the risk of failure.

•  The system regulates the flow of stack gas using a precision-drilled, non-reactive critical orifice combined with a custom-engineered eductor. This combination ensures optimized reliability, accuracy, and stability.

•  Extractive dilution technology stands out as one of the most competitive options for complying with strict and ever-changing regulations. By enhancing the reliability and accuracy of your CEM system, you can achieve significant financial benefits.

Global Analyzer Systems is a comprehensive provider of state-of-the-art, multi-component Continuous Emission Monitoring Systems (CEMS), as well as data acquisition and control systems. The company also offers regulatory compliance services and a range of on-site services.

Pros & Limitations
Low Maintenance Costs
Minimal Proprietary Components
Simple System Layout
Minimal Moving Parts
Utilizes Ambient Range Analyzers
Expandable Emissions Monitoring
Significantly reduced "Up-the-Stack" preventative maintenance
Proven history in Sulphur recovery incinerator stacks, natural gas power generation, and steam generation
Commonly configured to measure SO2, NOx, O2, CO, CO2, Total Reduced Sulphur (TRS) (COS, CS2, H2S) using one sample stream.
We currently don't offer in-situ CEMS.
Specification Title Specification Description
Monitoring capabilities
NOx, NO2, NO, SO2, O2, CO, CO2, Total Reduced Sulphur (TRS) (CoS, CS2, H2S), Total Hydrocarbon Content (THC).
Oil & Gas, Power Generation, Waste Incineration, Cement/Pulp and Paper, Chemical and Nitric Acid plants.
Low maintenance costs, minimal proprietary components, simple system layout, minimal moving parts, ambient range analyzers, expandable emissions monitoring
Emission monitoring, CO2 quantification, process control and monitoring, NH3 slip monitoring
Quality Assurance Plans
Development and implementation of quality assurance plans tailored to specific needs.
Annual Evaluations
Performing annual evaluations to ensure the accuracy and reliability of systems.
Customized Training
Providing bespoke CEMS training seminars to help teams understand and effectively use the technology.
Regulatory Compliance Support
Offering a wide range of support services to assist with regulatory compliance, including documentation and certification services.


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Technology Readiness Level

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Development Technology demonstration Mature / Proven
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Global Analyzer Systems stands at the forefront of air emissions monitoring for 25 years, committed to "bringing certainty to air emissions measurement." With our innovative Continuous Emission Monitoring Systems (CEMS) and services, we ensure compliance with environmental regulations, aiding industries in achieving sustainable operations.  

Global provides a wide range of equipment and services related to air monitoring including multi-component CEMS, Alternate CEMS, Data Acquisition and Control Systems, CEMS Online Reporting Services, On-Site Services​, Regulatory Compliance Support, Annual Evaluations, and Documentation and Training.  

Our new product line, Direct Optics, is designed to overcome market limitations by offering improved techniques for a more precise measurement of trace gases. The Direct Optics line includes our Dual-Channel Cavity Ring-Down Spectroscopy NO2-NOX-NO Analyzer, Photolytic Converter and Automated Air Sampler.  

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