The accuracy of the video analysis and the rotational speed is the reason the SDT is so precise. A high-resolution camera and a motor with excellent speed constancy are among the most important components of the instrument, combined with the intelligent image evaluation algorithm of the software ADVANCE. The previously necessary observation of a running measurement is now obsolete, as the drop can be automatically held in the middle of the video image.

In addition to the standard Vonnegut method, the software also evaluates the drop shape with the more robust Young-Laplace approach. Adding to this advantage, this method also extends the measuring range to higher interfacial tensions.