Particulate Filter Check
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This particle number test for the periodic technical inspection (PTI-PN test) was developed for diesel vehicles fitted with a diesel particulate filter (DPF). The test has now been introduced in Belgium, the Netherlands, Switzerland and Germany.
This website contains information about the PTI-PN test (or particulate filter check).
Particles Matter (126 pages) explains all you
need to know about the PTI-PN test
and particulate filter technology in general.
Click here to find out more.