The fine dust measurement device Fidas® Frog allows for a fast, reliable, and quality-assured determination of fine dust, e.g., monitoring within the scope of Health, Safety, and Environment (HSE) management at workplaces (exposure assessment) or in the range of indoor air quality measurements . It simultaneously measures the environmentally relevant mass fractions PM1, PM2.5, PM4, PM10, and TSP, as well as the particle number and the particle size distribution within the particle size range of 0.18 – 93 µm. The very compact and light design as a portable hand-held monitor with either battery or mains power operation and the operation time of up to 8 hours per battery charge allow for a flexible application at any measurement sites.