OMA-

300
206p
406r

NO_X Analyzer

The OMA is the ideal multi-component instrument for analyzing true NO_X (NO + NO₂) in emissions and critical process applications.

The release of nitrogen oxides (NO_X) to the atmosphere causes the formation of nitric acid rain and depletes the ozone layer. These emissions are heavily regulated around the world. Industrial combustion sites must report the amount of NO_X exiting their stack and often implement processes like DeNO_X to reduce these emissions.

Continuously measures true NO_X concentration by monitoring NO and NO2 absorbance curves
Totally solid state build with no moving parts — modern design for low maintenance
Affordable alternative to large CEMS investments
Optional close-coupled installation provides faster response than extraction at less cost than cross-stack

Request a Quote

Applications

The release of nitrogen oxides (NOx) to the atmosphere causes the formation of nitric acid rain and depletes the ozone layer. These emissions are heavily regulated around the world. Industrial combustion sites must report the amount of NOx exiting their stack and often implement processes like DeNOx to reduce these emissions.

Proven Applications

continuous emissions monitoring systems (CEMS)
DeNO_X
selective catalytic reduction (SCR)
selective non-catalytic reduction (SNCR)
diesel engine exhaust
flue gas
stack gas

NO_X Absorbance Spectra

To measure true NO_X, the OMA individually measures NO and NO₂ concentrations. The powerful multi-component software isolates the distinctive absorbance curves of the analytes and mathematically isolates their structures from the total sample absorbance. In accordance with Beer-Lambert Law, the OMA correlates the height of these curves directly to real-time concentrations. The NO_X reading is a simple sum of the two measurements.

Absorbance Curves: NO_X

NO₂

Absorbance (AU)

Wavelength (nm)

Models

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-Mount

OMA-300

Wall-mounted process analyzer

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

Learn more

Portable

OMA-206P

Suitcase process analyzer

Carry from site to site
Rugged suitcase enclosure

Learn more

Rackmount

OMA-406R

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:

Eexp

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

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.

Sampling

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.

Specifications

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
Detector	nova II™ UV-Vis diode array spectrophotometer
Spectral Range	200-800 nm
Light Source	Pulsed xenon lamp (average 5 year lifespan)
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
OPERATING CONDITIONS
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.
Sample Temperature	Standard: -20 to 70 °C (-4 to 158 °F) Optional: up to 150 °C (302 °F) with cooling extensions Contact AAI for temperatures above 150 °C (302°F)
Sample Pressure	Using standard flow cell: 206 bar (3000 psi)
UTILITIES
Electrical	85 to 264 VAC 47 to 63 Hz
Power Consumption	45 watts
OUTPUTS
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;
PHYSICAL SPECIFICATIONS
Select analyzer type:	OMA-300 Wall-Mounted Analyzer
	OMA-206P Portable Analyzer
	OMA-406R Rackmount Analyzer

NO_X Accuracy Example ranges below. Custom ranges available.
0-100 ppm	±5 ppm
0-10,000 ppm	±2% full scale or 5ppm*
0-100%	±2% full scale
*Whichever larger.

Standard Design	General Purpose
Available Options	ATEX, IECEx, EAC, PESO, JPN, KTL
Please inquire with your sales representative for additional certifications (CSA, FM etc.).