ANALYSER OF COMPOSITION OF EXPIRED AIR Russian patent published in 2015 - IPC G01N21/65 

FIELD: instrumentation.

SUBSTANCE: invention relates to analysis instrument building, and in particular to equipment allowing to diagnose certain types of human diseases by analysis of composition of the expired air. An analyser of composition of the expired air includes a continuous laser with wave length of 532 nm, a tight cell provided with two laser radiation inlet/outlet openings and with one scattered light outlet opening from its centre, a lens, a holographic filter, a high-aperture polychromator providing simultaneous recording of a spectrum in the range of 532-690 nm, as well as a control unit and a personal computer. Additionally, the cell is provided with a heating element connected to the control unit. Besides, a gas inlet of the cell is connected to an in-series located replaceable neck, a valve, an intermediate elastic chamber and an electric valve, and its gas outlet is connected to a small-size pump.

EFFECT: improving accurate determination of component composition of the expired air.

2 cl, 1 dwg