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Continuous Emissions Analyzer

The OMA is a scalable, solid state emissions monitoring technology with the detection limits needed for the EPA regulations of tomorrow.

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Scalable Emissions Monitoring

  • Measure as many chemicals as you need
    Add/remove analytes at any time
  • Integrated detection technologies
    The best sensor for each analyte
  • Single unified interface
    All sensors read to the central HMI


  • Fast, continuous reading
    Analyzer response time is 1 to 5 seconds
  • No false positives
    Interfering chemicals can be corrected for by AAI’s multi components algorithm*
    *Provide sample matrix to AAI for verification
  • Huge dynamic range
    Remains accurate through wide changes in concentration


  • Unattended operation
    Stabilized by Auto-Zero; remote operation optional
  • Inherently safe design
    Sample fluid never enters analyzer enclosure Learn more
  • Customizable alarms & outputs
    4-20 mA analog outputs; MODBUS; Hart... View technical specs

EPA Compliance

  • Robust data logging
    Easily configure storage settings via HMI
  • Rich trend data
    Due to high measurement frequency

Cost of Ownership

  • No consumables/reagents
    Other than zero fluid
  • Proven low-mainentance
    Only requires monthly optics cleaning
  • Long-life xenon light source
    Averages 5 years between replacement
  • Solid state instrument
    Outlasts competing models due to lack of moving parts


  • Hazardous area certifications
    Class I Div 1 & 2; ATEX; GOST... View certifications
  • No shelter required
    Rugged instrument suitable for outdoor installation


All OMA models are equivalent in function and performance with identical electronic configurations. The models vary by form factor and materials of construction, each intended for a unique use case.



Wall-mounted process analyzer

  • Indoor/outdoor use
  • ATEX, Class I Div 1/2, GOST...
Learn more


Suitcase process analyzer

  • Carry from site to site
  • Rugged suitcase enclosure
Learn more


Rackmount process analyzer

  • Fits standard 19" rack
  • Ideal for lab/shelter
Learn more

Explosion-Proof Models

The OMA-300 is offered in two explosion-proof formats:

Exp (Purged) Explosion-Proof OMA-300


Eexp systems are purged and pressurized using a certified air-purging device. This method ensures that toxic/explosive gas is not allowed to accumulate inside the enclosure and is ideal when instrument air is available.

Exd (Cast Aluminum) Explosion-Proof OMA-300


Eexd systems are contained within certified explosion-proof cast-aluminum enclosures. This method is more practical if the installation is remote or utilities are unreliable.


Continuous Emissions Monitoring

Modern industrial plants are typically required by law to measure and report the quantities of certain chemicals that they release to the atmosphere. As environmental regulations become increasingly stringent and ubiquitous, more plants worldwide will need adequate process analysis to guarantee compliance.

Government agencies such as the EPA and EEA have rigid criteria for Continuous Emissions Monitoring (CEM) systems. Stipulations include the mandatory monitoring of emissions of SO2, NOX (generic term for nitrogen oxides including NO and NO2), CO, CO2, and O2, as well as strictly regulated reporting of these chemicals’ concentrations.

While reducing emissions is a pressing environmental issue, it typically poses no direct financial benefit for the plant yet requires purchasing and servicing expensive equipment. Clearly, an ideal CEM system provides reliable compliance at minimal cost. The OMA CEMS is a fully integrated powerhouse, monitoring dynamic concentrations of various emitted chemicals with a single system.

While this solution leads its class in multi-component accuracy, it remains cost-effective by virtue of low-maintenance solid state design, competitive pricing, and high scalability for your exact analysis needs. The painless, economical route to environmental compliance and public social responsibility begins as soon as your OMA emissions monitoring solution is installed.

What makes an ideal CEM solution?

  • Accurate multi-component accuracy for 10 or more measured gas components
  • Suitability for large periods of unattended opreation
  • Customizable, reliable data logging and reporting packages
  • Intelligent sampling design
  • Low cost of maintenance and consumables
  • Flexibility for redefinition of measurement ranges and addition of new measurements as process evolves
  • Field-proven track record


Principle of Operation

To analyze the chemical composition of the sample, the OMA uses an analysis method known as ultraviolet-visible (UV-Vis) spectroscopy. The system measures absorbance from 200nm to 800nm and quantifies the amount of light absorbed by the sample at each integer wavelength; the OMA plots this raw data to visualize a high-resolution absorbance spectrum. Learn more

Spectrophotometer Principle of Operation

The OMA uses a long-life xenon light source to transmit a signal through the sample fluid in the flow cell. The signal is carried by fiber optic cables from the analyzer to the flow cell, where the chemical mixture of the sample has unique interactions with the light based on its current composition. Learn more

Optical Assembly

User Interface

Our proprietary ECLIPSE software processes the raw spectral data to provide real-time concentration readings. The operator can easily navigate between views (trendgraph, spectrum, and more) using intuitive touch-screen navigation. You can also configure alarms, data logging, and outputs. Learn more

ECLIPSE software

Inherent Safety

Most analyzers draw the process sample directly into the analyzer enclosure for analysis, which is dangerous if the sample fluid is toxic, explosive, or corrosive. The OMA design is unique: we bring the light to the sample, not the other way around. The sample circulates through the external flow cell, which receives the signal via fiber optic cables. Learn more

Analyzer Safety


The OMA is built for direct analysis of the hot/wet sample, thus simplifying the scope of the sample system and retaining high sample integrity. From our vast experience in sampling design, we know that applications can be similar but are rarely identical. For this reason, we design and build sample conditioning systems on a project basis, working from the process to the drawing board.


Note: All performance specifications are subject to the assumption that the sample conditioning system and unit installation are approved by Applied Analytics. For any other arrangement, please inquire directly with Sales.

Measurement Principle Dispersive ultraviolet-visible (UV-Vis) absorbance spectrophotometry; Non-dispersive infrared (NDIR) absorbance spectroscopy; Paramagnetic Oxygen Analyzer
Light Source Pulsed xenon lamp (average 5 year lifespan); Black-body Tungsten lamp
Signal Transmission 600 μm core 1.8 meter fiber optic cables
Other lengths available
Path Length Application-dependent
Sample Conditioning Custom design per application
Analyzer Calibration If possible, analyzer is factory calibrated with certified calibration fluids; no re-calibration required after initial calibration; measurement normalized by Auto Zero
Reading Verification Simple verification with samples and self-check diagnostic
Human Machine Interface Industrial controller with touch-screen LCD display running ECLIPSE™ Software
Data Storage Solid State Drive
Analyzer Environment Indoor/Outdoor (no shelter required)
Ambient Temperature Standard: 0 to 35 °C (32 to 95 °F)
Optional: -20 to 55 °C (-4 to 131 °F)
To avoid radiational heating, use of a sunshade is recommended for systems installed in direct sunlight.
Electrical 85 to 264 VAC 47 to 63 Hz
Power Consumption 45 watts
Standard Outputs 1x galvanically isolated 4-20mA analog output per measured analyte(up to 3; additional available by upgrade)
2x digital outputs for fault and SCS control
Optional Outputs Modbus TCP/IP; RS-232; RS-485; Fieldbus; Profibus; HART;
Select analyzer type: OMA-300 Wall-Mounted Analyzer
OMA-206P Portable Analyzer
OMA-406R Rackmount Analyzer
Response Time 1-5 seconds
Zero Drift ±0.1 % after 1hr warm-up, measured over 24hrs (constant ambient temperature)
Sensitivity ±0.1 % full scale
Noise ±0.004 AU at 220 nm
Example ranges below. Custom ranges available.
SO2 0-1,000 ppm: ±1% full scale
NO 0-1,000 ppm: ±1% full scale
NO2 0-1,000 ppm: ±1% full scale
CO 0-500 ppm: ±1% full scale
CO2 0-20%: ±1% full scale
O2 0-25%: ±1% full scale
Standard Design General Purpose
Available Options ATEX, IECEx, EAC, PESO, JPN
Please inquire with your sales representative for additional certifications (CSA, FM etc.).


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