FIELD: measuring technique.
SUBSTANCE: device comprises source of laser beam, controller of output laser radiation, controller of modulation of wavelength, two light receivers, two detectors of the component of the DC, three demodulators of modulation of wavelength, optical system, standard cell, analyzer, adder, means for measuring temperature, and means for measuring pressure. The device is additionally provided with the means for measuring two components of velocity of flow and vertical component of velocity of gas.
EFFECT: reduced time of response and enhanced stability.
13 cl, 17 dwg
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