Sampling system is used to collect suspended particulate matter either in-doors or outdoors. It combines a proven sampling unit – model LVS 3.1 (low-volume sampler) and a filter changer in one compact housing. Sampling inlet for the PM10 particulate matter fractions is used. The particulates are collected on special filters that are then evaluated through either gravimetric or analytical means. Filter changes are executed automatically at pre-programmed intervals. The unit’s external sensor is used for continuous registration of tempera-ture and relative humidity. The ambient temperature is measured at an accuracy of ±0.5 K in a range of from -40 to +80 °C, relative humidity at an accuracy of ±3 % in a range of from 0 to 100 %.