ROTAMETERS (VERSIONS) Russian patent published in 2003 - IPC

FIELD: measurement of flow rate of liquid or gas. SUBSTANCE: bush with at least two slots is introduced into transparent outer cylindrical tube of rotameter. According to one version, slots are made in form of truncated cone; according to another version, one side of slot is made over generatrix of outer cylindrical surface of bush and other is located at angle ensuring required coefficient of flow rate. Narrow base of slots is directed to inlet and wide base is directed to outlet. Rotameter is fastened by means of studs. EFFECT: enhanced accuracy of measurements. 3 cl, 4 dwg