MEXA-ONE-XL-NX

Laser Exhaust Gas Analyzer for Real-Time Nitrogen Compound Measurement

Developing and calibrating modern exhaust aftertreatment systems requires more than measuring total NOx. Engineers need to understand how individual nitrogen compounds change during transient operation, low-temperature conditions and high engine loads.

The MEXA-ONE-XL-NX, also known as MEXA-ONE IRLAM simultaneously measures NO, NO₂, N₂O and NH₃ in real time, helping engineers evaluate NOx conversion, monitor ammonia slip and identify N₂O formation. Its wide measurement range supports measurements from low-concentration tailpipe emissions to higher engine-out and pre-catalyst concentrations.

Powered by HORIBA’s IRLAM™ (Infrared Laser Absorption Modulation) technology, the analyzer delivers low-noise, high-sensitivity measurement with minimal interference. This provides reliable data for engine calibration, catalyst development, aftertreatment optimization, next-generation fuel research and emissions compliance testing.

As part of HORIBA ONE PLATFORM, the MEXA-ONE-XL-NX can be integrated with other compatible HORIBA measurement systems through a common user interface. This enables centralized control, monitoring and management of emissions measurement equipment while supporting future system expansion.

Complete Nitrogen Compound Measurement in Real Time

The MEXA-ONE-XL-NX simultaneously measures NO, NO₂, N₂O and NH₃, giving engineers synchronized data from a single analyzer for understanding engine and aftertreatment performance.

Synchronized real-time measurements of NO, NO2, N2O and NH3 during changing engine operating conditions.

^{Example of synchronized, real-time nitrogen compound measurement during changing operating conditions.}

Wide measurement ranges support engine-out, pre-catalyst, post-catalyst and tailpipe applications
Fast response captures changes during transient operating conditions
One analyzer supports the evaluation of NOx conversion, ammonia slip and N₂O formation
Synchronized measurement data can be correlated with engine conditions and control events

High-Precision Measurement with IRLAM™ Technology

IRLAM Infrared Laser Absorption Modulation technology.

HORIBA’s IRLAM™ (Infrared Laser Absorption Modulation) technology provides sensitive and stable measurement in complex exhaust gas mixtures.

High sensitivity and low-noise performance at low concentrations
Minimal interference from other exhaust gas components
Direct wet measurement without removing water from the sample
No NO₂ converter required for NOx measurement
Consistent response without converter deterioration or ammonia poisoning
Reduced maintenance associated with converters, ammonia-protection filters and other consumable components

Support Aftertreatment Development and Calibration

Gain the detailed measurement data needed to understand catalyst behavior and optimize emissions-control strategies.

Evaluate catalyst conversion performance
Optimize SCR catalysts and urea-dosing strategies
Monitor ammonia storage and slip
Identify unintended N₂O formation
Analyze catalyst behavior during cold starts, warm-up and high-load operation
Compare aftertreatment performance across conventional and next-generation fuels

Integrated with HORIBA ONE PLATFORM

As part of HORIBA ONE PLATFORM, the MEXA-ONE-XL-NX provides a consistent operating environment across compatible HORIBA measurement systems.

Operate compatible devices through a common user interface
Centralize equipment control, monitoring and management
Support consistent operating procedures across laboratories and test cells
Expand the measurement system as testing requirements evolve
Discover how HORIBA ONE PLATFORM connects and manages laboratory measurement systems.

Support Aftertreatment Research, Development and Calibration

Generate the detailed, synchronized measurement data needed to investigate catalyst behavior, compare control strategies and optimize emissions performance throughout the development process.

Evaluate catalyst conversion performance
Develop and optimize SCR catalysts
Refine urea-dosing and emissions-control strategies
Monitor ammonia storage and slip
Investigate unintended N₂O formation
Analyze catalyst behavior during cold starts, warm-up and high-load operation
Compare aftertreatment performance across different fuels and combustion concepts

Applications

The MEXA-ONE-XL-NX supports research and development programs focused on understanding nitrogen compound formation and improving engine and exhaust aftertreatment performance.

^{Example measurement locations for evaluating engine-out emissions and catalyst performance.}

Catalyst and exhaust aftertreatment system R&D
SCR catalyst evaluation and urea-dosing development
Engine and powertrain research, development and calibration
Engine-out, pre-catalyst, post-catalyst and tailpipe measurement
Cold-start, low-temperature and high-load emissions research
Investigation of ammonia slip and unintended N₂O formation
Research involving CNG, e-fuels, biofuels and ammonia co-combustion
Internal-combustion engine and gas-turbine development
Development and validation related to Euro 7/VII, China 7 and other emerging emissions requirements

MEXA-ONE-XL-NX Specification

Measurement target	Exhaust gas from internal combustion engine and gas turbine (Direct/Conti-dilute)
Emissions Standard	US EPA GHG^*1, GTR No.15 (NO₂, N₂O, NH₃)
Measurement range	NO (Low) 0-200 ppm (High) 0-6000 ppm NO₂ (Low) 0-100 ppm (High) 0-3000 ppm N₂O (Low) 0-200 ppm (High) 0-6000 ppm NH₃(Low) 0-100 ppm (High) 0-3000 ppm
Measurement Principle	Quantum Cascade Laser Infrared Spectroscopy; QCL-IR
Sample gas line temperature	113 °C± 6 °C
Sample gas flow rate	8.0 L/min ± 1.0 L/min
Operating environment	Ambient temperature: 5~40°C Ambient humidity: 80% or less as relative humidity
Power requirements	When stable: Max. 750 VA (analyzer unit only)
Dimensions	440(W)×720(D)×880(H) mm (Except for outshoots)
Mass	Approx. 110 kg

^*1 Measurement method in accordance with CFR 1065 (N₂O). Please contact us for details.

Performance

Zero noise(2σ)	NO (Low range) 0.4 ppm or less (High range) 12 ppm or less NO₂ (Low range) 0.2 ppm or less (High range) 6 ppm or less N₂O (Low range) 0.4 ppm or less (High range) 12 ppm or less NH₃ (Low range) 0.2 ppm or less (High range) 6 ppm or less
Rise time (calibration gas line t10-90)	2.5 s or less N₂ NO 200 ppm at the time of switching 2.5 s or less N₂ NO₂ 100 ppm at the time of switching 2.5 s or less N₂ N₂O 200 ppm at the time of switching 3.5 s or less N₂ NH₃ 100 ppm at the time of switching

Size: 2.1 MB

MEXA-ONE IRLAM Brochure English