UN Rule No. 1
Vehicle Inspections: Environmental Protection
Uniform provisions for periodical technical inspections of wheeled vehicles with regard to the protection of the environment
10 Feb 2020 Proposal for regulations to check diesel particulate filters (DPFs) with a particle counter PTI-17-02 2020-02-10
10 Feb 2020 PTI: Instruments for measuring vehicle exhaust particulate number emissions PTI-17-03 2020-02-10
10 Feb 2020 PTI: Particle Number Counter- Metrological controls and performance tests PTI-17-04 2020-02-10
10 Feb 2020 Follow-up research into the PN limit value and the measurement method for checking particulate filters with a particle number counter (TNO) PTI-17-05 2020-02-10
14 Feb 2020 PTI Particle Number test procedure (TNO) PTI-17-08 2020-02-14