The sampling system PU-5 is designed for sampling air and other gases to determine the concentration of gas-aerosol impurities . The sampling is carried out by pumping the gas-aerosol mixture through a system of filters and absorbers, which are further subjected to laboratory analysis.The device can work both from the network and from a built-in autonomous power source, which allows sampling in hard-to-reach places that do not have a mains power supply and also in mobile laboratories.