3 Fractions:

1. > PM 10 (> 10 µm, inhalation particle)
2. PM 10 (2,5 bis 10 µm, thorax particle according to ISO 7708)
3. PM 2,5 (< 2,5 µm, alveol particle accordingb to ISO 7708)

Also available with PM 4 stage.

Advantage Johnas impactor:

• No separation efficiencies influences like multi stage impactors. 
• Standard Munktell quartz plane filter can use. 
• Impactor can use with Gothe sampling equipment. 
• Easy and simple filter change (like a TSP filter). 
• No corrosion or contaminations, because from Titanium.