FIELD: physico-chemical measurements, automatic analysis of gases. SUBSTANCE: pulse gas analyzer has two tubes connecting gas analyzer to object of test, instrument gas detector with two pipe unions, filter connected to one of tubes, reversible agitator of gas flow placed between second tube and one of pipe unions of instrument gas detector, measuring and control devices. Gas analyzer is supplemented with comparison gas detector and additional filter. Comparison gas detector is located between filter and additional filter and second pipe union of instrument gas detector is linked to additional filter. Instrument and comparison gas detectors are connected to measuring device differentially. EFFECT: increased accuracy of detection of microconcentrations of gases and vapors in air. 1 dwg
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