The gas analyser is a modern device, prepared and ready to comply with the OIML class 1 and O, ISO 3930, UNE 82501, bar 90, bar 97, The system allows two types of measurement: 1. Numerical measurement: it presents the gas concentration and the r.p.m. In numerical way. 2. Graphic measurement. Based on infrared technology, it measures up to 5 gases (CO, CO2 HC, O2, NOx) and other parameters such as Lambda, corrected CO, oil temperature and r.p.m. It is very useful for starting and injection problems as well as for improvement of fuel consumption. The data base includes all car models and their emission values. The gas analyser + smoke meter is a modern equipment .