Development of the Intelligent Instrument for Measuring the Static and Dynamic Surface Tension

On the principle of measuring static surface tension (SST) and dynamic surface tension (DST) by maximum bubble pressure method through the collection and control function of microcomputer, a set of new device for measuring SST, DST is established. It takes about 10 minutes for measuring a sample. Data tables and figures can be obtained. The parameters can also be got, such as DST, effective age, difference of bubble pressure. The precision of the measuring is better than 0.03 mN/m for DST and 0.05 mN/m for SST.