Abstract: An apparatus for measuring and correcting the calibration characteristic of a photoelectric aerosol analyzer comprises a light guide disposed within a nozzle of the analyzer and having its one end arranged in the analyzer, said end face being made as a ball to provide for an even distribution of the light flux in the working zone of the analyzer. There are provided a controllable light pulse generator, adapted to measure and correct the calibration characteristic of the analyzer, and a meter to measure the intensity of the light flux in the working zone, said generator and said meter being installed, one at a time, above the other, flat, end face of the light guide.

Abstract: A device for introducing particles into an analyzer of dustiness of a gaseous medium comprises a cell having a transparent cover with a microscope arranged thereabove. A through guide duct is made in a wall of the cell, while provided in the bottom of the latter are a vertical feed duct communicating with the dustiness analyzer and a horizontal channel which is an extension of the through guide duct and intersects the vertical feed duct. The device also comprises a source of a pure gaseous medium which is fed under pressure into the through guide duct wherewith the source communicates.