Stalagmometer has been the most frequently used methods for finding out the surface tension. Numerous drops of liquid emitted from the glass capillary of stalagmometer have weighed, if the weight of liquid is known about every drop, we are able to count the leak droplets to the determination of the surface tension. The drop at the tip of the glass capillary is placed in a vertical position and has been formed gradually on the tip, The pendant drop turns to begin separation while its weight goes to the magnitude balance. The Volume depends on the characteristics of the liquid.
This method is utilized for interfacial tension determination in the form of interface edge, a liquid of density is pumped to another liquid which has different density and the drops number of every liquid in the air and the interface is calculated. alternatively, drop weight is calculated.
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