The Environmental Dust Monitor EDM 107 of Grimm's Enviro-product group, the entire PM values are on hand in real-time. This reliable top of the line device was developed especially for mobile and instant on-site measurements of environmental dust. It is portable, tough and displays simultaneously all three of the PM values (PM10, PM2.5 and PM1) in real-time. The PM masses are gathered in a size range from 0.25 to 32 µm in >30 size classes and displayed as PM values.