<h2>Spinning Drop Video Tensiometer.</h2>
<h2><p style="font-size: 12px; font-weight: normal; ">The spinning drop video tensio­meter, 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:</p><ul style="font-size: 12px; font-weight: normal; "><li>Automatic control of the electronic tilting base, for positioning of the rotating droplet along the rotary axis of the capillary</li><li>Automatic variation of the rotation speed</li><li>Measurement and analysis of the static, time, and temperature dependent interfacial tension (1·10<sup>-6&nbsp;</sup>to 2·10<sup>3</sup>&nbsp;mN/m) according to the spinning&nbsp; drop method and oscillating spinning&nbsp; drop method.</li><li>Measurement and analysis of the 2D and 3D extensional relaxation of visco-elastic liquids and membrane encapsulated liquids. drops by variation of the rotational speed.</li><li>Determination of the yield point of liquid crystalline.</li><li>Determination of the dispersive and polar parts of liquids on the basis of interfacial tension, with error limits.</li><li>Calculation of the geometry of rotating drops related to the rotary axis.</li></ul><p style="font-size: 12px; font-weight: normal; "><br /><strong>Features of the basic instrument configuration:</strong></p><ul style="font-size: 12px; font-weight: normal; "><li>High dynamic, electronically commutated direct current motor with software controlled speed control (0 to 20?000 rev/min; ± 0.001 rev/min)&nbsp; to realise spped steps (± 2?000 rev/min/s) and sinusoidal speed variations (0.01 to 200 Hz) for relaxation measurements.</li><li>High-performance 6-fold power zoom lens with an integrated continuous fine focus and adjustable observation angle.</li><li>Video measuring system with USB-camera (max. 146 images/s sample rate).</li><li>USB connection to PC (or Notebook).</li><li>LED lighting with software controlled adjustable intensity and strobe frequency.<br />Integrated touch screen for controlling basic functions.</li><li>Automatic, software controlled position and tilt adjustment.</li><li>Automatic calibration function for correcting optical distortions caused by the capillaries (cylindrical lens effects).</li></ul><p style="font-size: 12px; font-weight: normal; "><br /><strong>Optional SVT accessories:</strong></p><ul style="font-size: 12px; font-weight: normal; "><li>Easy mountable liquid/gas-temperature controlled measuring cell MC TFC 130; temperature range&nbsp; -10 to 130 °C.</li><li>Easy mountable peltier/gas-temperature controlled measuring cell MC TPC 180; temperature range -30 to 180 °C; ±0.1 K resolution with a heat up and cool down rate of ±1 K/s.</li><li>Fast-exchangeable special high-temperature glass capillaries (up to 180 °C) FEC&nbsp;622/4 0-HT.</li><li>Cost-effective (disposable) fast-exchange capillaries made of polycarbonate (up to 60 °C) FEC&nbsp;780/400-P.</li><li>Automatic dosing system ES-D/S.</li><li>Calibration standard DCS-SVT.</li><li>The available software modules for the SVT 20N are:<ul><li>SVTS 20&nbsp; - Interfacial Tension.</li><li>SVTS 21 - Oscillation.</li><li>SVTS 22 - Geometry</li></ul></li></ul><span style="font-size: 12px; font-weight: normal; "><link file:370 - download "Initiates file download">Data Sheet SVT 20 N</link></span></h2>