Protecting the environment from harmful emissions from internal combustion engines requires an effective method either to avoid them, or to convert them into innocuous gases. Since recently any newly registered vehicle is required to meet the EURO VI emission standard. Consequently, there is a permanent requirement for engine developers to ensure the denitrification of the engine exhaust and thus reduce the amount of harmful emissions.

The LDS 6 has been approved for the "Laser diode spectrometer (LDS)" measurement principle according to the EURO VI standard (appendix 582/2011/EC). It is perfectly suited for the requirements of the standard, because it determines the ammonia concentration quickly and easily, while it can also be checked according to the EURO VI standard without the need to use external test gases. This eliminates the need for time-consuming and costly linearity checks by the user.