Spartna SPR-711 it can measure Dust Particle Detector, Sulfur dioxide (SO2), Nitrogen dioxide (NO2), Hydrogen sulfide (H2S), Ozone (O3) detection, air temperature and relative humidity. It has many functions. With it is possible to determine the number of particles in the size of 0.3, 1.0, 2.5 and 10 µm. It is the ideal instrument for environmental safety and energy-saving surveys.