The AVL 439 Opacimeter is designed for use on engine test beds.
The opacity of the exhaust gas can be determined both in static and in dynamic engine state. This instrument is therefore suitable for use in research, development and manufacturing.
The AVL 439 Opacimeter meets the requirements of the following regulations
    EC Council Directive 72/306/EEC resp. ECE R24
    EC Council Directive 77/537/EEC incl. Addendum 82/890/EEC
    EC Council Directive 1999/96/EEC
    ISO 8178-9
The AVL 439 Opacimeter also complies with
    ISO 3171 and
    ISO 11614 (under preparation)