FIELD: instrumentation.
SUBSTANCE: in thermocatalytic detector operating in static mode, they limit diffusion of analysed gas mixture into a reaction chamber, sending it via a calibrated hole of small cross section, and diffusion balance is set between flows of arriving and oxidised flammable gas on a SE at incomplete (half and less) involvement of efficiency of the working SE, providing for efficiency reserve, which, as sensitivity gradually reduces, automatically takes action, maintaining stability of measurements and extended service life of the detector.
EFFECT: realisation of the method is most favourable with minimised volume of a reaction chamber and dimensions of sensitive elements.
3 cl, 3 dwg, 1 tbl
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