MEXA-ONE-QL-NX

Laser Spectroscopic Motor Exhaust Gas Analyzer

HORIBA ONE Series Introduces New N-Compounds Analyzer

The MEXA-ONE-QL-NX is an analyzer for the direct, simultaneous real-time measurement of the four relevant nitrogen-containing exhaust gas components NO, NO₂, N₂O and NH₃.
The analyzer combines a light source based on the new quantum cascade technology (efficient lasers in the mid-infrared spectral region) with a precisely adjusted dual path cell to measure low concentrations with maximum sensitivity. The detection limit complies with current European legal requirements.
Furthermore, the MEXA-ONE-QL-NX offers wide measuring ranges of up to 5000 ppm (for NO). By using extremely narrowband light sources and measuring under reduced pressure the cross-sensitivity to other exhaust gas components can be drastically minimized.
The complete measuring system - including filtration - is specifically developed for the measurement of NH₃ and thus guarantees a very fast NH₃ rise time (T10-T90) of less than 5 seconds.
The MEXA-ONE-QL-NX can be operated as a stand-alone analyzer or integrated into the MEXA-ONE software interface for user-friendly and simplified system operation.

For R&D of advanced NO_x after-treatment systems

Simultaneous real-time measurement of four nitrogen compounds (NO, NO₂, N₂O and NH₃)
Wide dynamic ranges for all components (e.g. NH₃: 0.6 ppm to 2000 ppm)
Fast response times (T10-T90):
NO, NO₂, N₂O: <2 s
NH₃: <5 s

Segment: Automotive

Division: Emission Measurement Systems

Manufacturing Company: HORIBA, Ltd.

Applications

Development of new NO_x after-treatment systems, such as urea-SCR, CRTs and LNTs
Certification of NH₃ emissions according to the latest European legislation for light duty vehicles (WLTP/GTR 15)
As an R&D tool for worldwide regulations - certification or reporting of greenhouse gas emissions (EPA) or ammonis (Euro VI)

All advantages at a glance

Compliant with WLTP/GTR 15 for NH₃ measurement
Suitable for the measurement of very low concentrations
Wide dynamic ranges (up to 5000 ppm)
Very low cross-sensitivity for other exhaust gas components
No operating gases other than compressed air
Direct NO₂ measurement
Easy handling (no liquid nitrogen cooling necessary)
Operation within HORIBA ONE PLATFORM

Model	MEXA-ONE-QL-NX
Measuring principle	Quantum Cascade Laser Infrared (QCL-IR) Spectroscopy
Measuring components	NO・NO₂・N₂O・NH₃
Measuring range	NO: (low) 0-100 ppm (high) 0-5000 ppm NO₂：(low) 0- 50 ppm (high) 0-2000 ppm N₂O：(low) 0-100 ppm (high) 0-2000 ppm NH₃：(low) 0- 50 ppm (high) 0-2000 ppm
Zero noise(2σ) (σ：standard deviation)	NO ：(low) < 0.4 ppm (high) < 20 ppm NO₂：(low) < 0.2 ppm (high) < 8 ppm N₂O：(low) < 0.4 ppm (high) < 20 ppm NH₃：(low) < 0.2 ppm (high) < 8 ppm
Sample line temperature	113 ± 6ºC
Response time ( t_10-90)	NO, NO_2,N₂O: < 2 s NH₃: < 5 s*
Dimensions/mass	Main unit：440×660×877 (mm) Approx.: 120 kg (excluding protruding objects)
Sampling rate	10 Hz
Flow rate	8 L/min ± 1 L/min
Inlet pressure	standard: - 5 kPa to +30 kPa (relative) optional: -5 kPa to + 200 kPa (relative)
Span noise	< 2% full scale (FS)
Zero/ span drift	< 1% FS/ 8 h
Warm-up time	2 h

* determined with NH₃ (50 ppm) supplied to the sample inlet at a flow rate of 8 L/min via a 0.3 m sample probe, a heated filter and a 6 m heated line.