Abstract: A further study on the determining liquid＇s surface tension coefficient with the capillary tube probe method was carried out by means of a greater diameter capillary tube.The refined Rayleigh＇s equation proposed by Prokhorov was employed in this paper,the applicable scope of each related equations to calculate surface tension coefficient α was introduced as well.The capillary rise heights of distilled water in a diameter of 5.744 mm at a few different temperatures were measured,by experiment,using the probe method respectively,Prokhorov＇s equation was used for calculating α.The percentage error between the determined surface tension coefficient of distilled water and its recognized value was less than ca.0.13% compared with the recognized value.The error causes in terms of the experimental results were analyzed at the end.

Key words: capillary tube probe method, surface tension： Prokhorov＇s equation