FIELD: measurement technology. SUBSTANCE: temperature and pressure of gas are measured directly in closed vessel and flow rate of gas from closed vessel is found with the aid of equation of gas state with due account of compression factor of real gas considered as function of two variables, pressure and temperature. Process is implemented with the help of gear incorporating pressure and temperature transmitters installed in closed vessel and electronic unit processing information from these transmitters. Electronic unit includes control unit incorporating subunit selecting type of gas, selecting measured function and specifying volume of closed vessel, double-channel analog-to-digital converter, functional device based on storage media to determine mass of gas left in closed vessel, differentiator based on storage media, digital and letter indicator and comparator into which tested parameter is entered. EFFECT: increased measurement precision. 2 cl, 1 dwg
