The spinning drop video tensioÃ­meter, SVT 20N, is a special purpose optical instrument for measuring of conventional to extremely low interfacial tensions.&nbsp;<br />The control/data analysis software is designed for intuative use and fast access to all control elements.&nbsp;<br />Combined with the software packages SVTS 20, SVTS 21, and SVTS 22 the SVT 20N provides the following functions.