GAS MEDIUM DUST CONTENT TESTER Russian patent published in 2008 - IPC G01N15/06 G01N21/94 

FIELD: physics; engineering procedures.

SUBSTANCE: tester contains light assembly with radiation source and collimator optically connected through light glasses of aspirating channel to receiving lens of scattered radiation of analysed medium, optically coupled to first photodetector; second photodetector, optically coupled to radiant flux, photodetector signal processing system and data imaging assembly. The second photodetector is placed behind light glass before aspirating channel and optically coupled through light assembly glass scattering to radiant flux. Behind light glass of aspirating channel there are at least two additional photodetectors provided. One additional photodetector with receiving lens of radiation passed through the analysed medium is provided on one optical axis with light assembly, and another - with receiving lens. Scattered radiation falls on it under larger or smaller angle, rather than on the first photodetector of scattered radiation. Semiconductor point radiator emitting pulse radiation alternately at not less than two wavelength of optical range is used as radiation source.

EFFECT: expansion of range and reduction of measurement errors.

2 dwg