The GRIMM EDM 180 is the only commercially available fine dust monitoring unit in the world, approved for PM & PM , capable of measuring PM , PM and PM in μg/m³, as well as TC (total particles) in p/l at the same time. Measurement updates of all these values are provided in 60-second intervals and in combination with optionally available meterological sensors identifying the origin is facilitated, thus permitting a better risk assessment..