The fine dust measuring device with the Swiss precision sensor type Sensirion SPS30 detects and evaluates fine dust concentration according to the official guidelines of the Federal Environment Agency in the categories PM 2.5 and PM 10. These are among the most dangerous air pollutants. Fine dust particles with a diameter of up to 10 micrometers include pollen and allergens from plants and flowers. Fine dust particles with a diameter of up to 2.5 micrometers, for example, are industrial exhaust gases that can penetrate deeply into the respiratory tract due to their small size and can cause lasting damage to the lungs. The AirMonitor PURE warns of health-hazardous fine dust concentrations with a color-coded and numerical display, as well as a switchable acoustic signal. Additionally, the device continuously displays the time, temperature, and humidity.