Emissions regulations under control at all times

12 février 2015


All manufacturers in the automotive segment face the challenges posed by more stringent regulations for nitrogen emissions (NOx emissions) when developing their engines and NOx after treatment systems. A number of demands made on the real-time measurement of these emissions are directly connected with the regulations. The engine exhaust gas analyzer MEXA-ONE-QL-NX, which can be integrated into HORIBA ONE PLATFORM, supports manufacturers in implementing the regulations and developing environmentally friendly products. The management software allows convenient operation using a single display. Furthermore, HORIBA ONE PLATFORM now possesses a number of new and improved features. These include an enhanced calendar function, an operating hours counter for service parts and quality checks, as well as more efficient trouble-shooting possibilities via flow chart and proposed solutions display. MEXA-ONE-QL-NX thus joins the ONE series of HORIBA products managed via the software.

MEXA-ONE-QL-NX in detail

This compact, highly-accurate analyzer is particularly suited for the evaluation and measurement of catalyst systems for NOx after treatment. Quantum cascade laser (QCL) spectroscopy is used for this purpose. Some of the principal advantages of MEXA-ONE-QL-NX are its rapid response time and its data output of 10 Hz. This allows transient driving cycles with high resolution and maximum accuracy for components such as N2O (nitrous oxide / laughing gas) or NH3 (ammonia). The wide dynamic range and the optional integration of a sample line selector enables MEXA-ONE-QL-NX to carry out measurements at four sampling points located at various positions within the catalyst or the tailpipe. A total of four nitrogen compounds (NO, N2O, NO2 and NH3) can be accurately measured in real-time according to all current emission standards.

Quantum cascade laser spectroscopy

The quantum cascade laser spectroscopy used by MEXA-ONE-QL-NX comprises a laser operating in the mid-infrared region and a vacuum optical cell for ultra-high sensitivity and minimum to no interference to other exhaust gas components. The dual-path technique in a single cell provides a wide dynamic range from 50 ppm to 5,000 ppm (parts per million). The detector requires neither liquid nitrogen (LN2) nor operating gas.

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