This Particle Counter has many functions. With the Particle Counter Device it is possible to determine the number of particles in the size of 0.3, 2.5 and 10 µm.Measurable particle sizes: PM 2.5 and PM 10Measuring range: 0 … 2000 µg / m³Resolution: 1 µg / m³Particle counter, HCHO, temperature measurementDew point and wet bulb temperature