FIELD: instrumentation.
SUBSTANCE: temperature measurement and ultrasound speed are measured in the measured gas, the speed in pure hydrogen is determined at the same temperature, and the concentration of hydrogen in gas mix is calculated using the mathematical expression considering the ratio of ultrasound speed in pure hydrogen squared to ultrasound speed in the measured mix of gases squared and the ratio of molar mass of admixtures in hydrogen to the molar mass of pure hydrogen are determined.
EFFECT: simplification of hydrogen volume concentration measuring system, increase of its long-term stability and decrease of measurements errors.
2 cl, 1 dwg
