The results of the announcement by ZDK of the emission inspection defect rate for 2008 is food for thought: with a total of 11 million official emission inspections 8.5 % of all tested vehicles had defects. Of the approximately 900,000 conspicuous vehicles more than 700,000 could be repaired with fairly simple measures. A total of 190,000 vehicles did not pass the official emission inspection.

Emissions are among the most hazardous components of particulate matter. Only when the measurement procedure keeps pace with technical advances is there a chance to permanently drastically reduce particle emissions.

From the time of the introduction of the official diesel inspection in 1993 up to today there have been massive innovative development thrusts in vehicle technology. The respective test technology must satisfy these developments. An urgent updating and modernization of the emission inspection is inevitablewith an adaption to the current vehicle technology.

The opacimeter of the second generation from MAHA is a logical further development of the classical opacimeter and is the answer to the demands of the automobile industry. The MET 6.1 – previously MGT 5- for gasoline motors – for identifying CO, CO2, HC, O2, NOx (Lambda), the MDO, MPM for diesel has been replaced by the MET 6.2. The combi-tester, now called MET 6.3, is regarded as an innovative emission tester for gasoline and diesel vehicles.

With the MET 6.3 the accurate measurement of gasoline and diesel emission is possible. Particles larger than 70 nm are recognized and determined in the emission flow via laser beam. The effectiveness of particles filter can also be verified. The functional priniciple of the MET 6.3 is easy and effective.

As both turbidity values (m-1) and particle concentration (mg/m3) can be measured, it is suitable for the official emission test as well as for particle filter testing.

The small size, low weight of under 5 kg, easy handling, extremely high measurement accuracy and the compatibility with measurement and test stands guarantees optimum usage in workshops, development and research. Thanks to low maintenance needs- the only wear and tear part in the diesel tester is the HEPA filter which is accessible via the service flap and easily exchanged – the MET 6.3 can be classified as highly efficient, economical and suited for tough everyday usage. PTB approval has been applied for for the entire 6-emission series.