2.2. Sampling mode
For the measurements by size distribution, a high volume sampler, the HVS-PM-10 equipped of cascade
impactor (brand Andersen) with four levels was used. The device shown in Figure 1 was composed of three main
parts:
• The High Volume Sampler (HVS) which represents the body of this sampler consists mainly of:
- An air aspiration turbine ;
- Levels of selection that are use as filters racks in order to sort the particles by size;
- An electronic flow controller, MFC (Mass Flow Controller), which maintains a constant flow of air aspiration. In
case of clogging of the media filter, the MFC acts on the engine power by the electronics regulation of the voltage.