Several tests with dolomite sand < 90 μm were performed, varying all parameters of the powder disperse to realise a slow and linear increase of dust concentration over time. To perform dust tests, solid cleaning of all devices at the beginning is required; otherwise, it is possible to have a large dust cloud when starting the test procedure causing biased results. The airflow in the duct is generated by an encapsulated motor with a mounted airscrew giving a flow velocity between 0.2 m/s and 1 m/s as required by the EN54 [15] for the test of detectors when using atomised paraffin oil.