CONTACTLESS PNEUMATIC METHOD FOR SURFACE-TENSION MEASUREMENTS

A basically new contactless pneumatic method is proposed for determini ng the surface tension of a liquid by measuring the critical gas-jet i ncidence angle at which auto-oscillations arise in a ''gas-jet - liqui d'' system. The results of experimental studies are presented. The sta tistical dependence of the gas-jet critical angle of incidence on surf ace tension and metrological characteristics of the method of measurem ent and its implementing device are determined. The method can be appl ied to control measurements of different liquid media under both labor atory and industrial conditions.