Product Overview

The KRUSS SDT Spinning Drop Tensiometer measures interfacial and surface tension with a high degree of accuracy and within wide measuring range, ideal for the development of mini- and micro-emulsions and surfactants. Extremely low interfacial tension can be measured accurately for a range of applications such as enhanced oil recovery and food or pharmaceutical/ cosmetic formulations.

Controlled rotation and image evaluation

Interfacial and surface tension measurements are carried out by analysing video images of a drop or bubble within a fluid, inside a rotating capillary. This method involves a horizontally positioned capillary filled with a bulk phase and a lighter drop phase, set into rotation. The centrifugal force elongates the drop, and its diameter or curvature is correlated with the interfacial tension. Using the rotational speed, the interfacial tension is accurately determined based on the deformation of the drop. A high-resolution camera and precision motor, paired with the intelligent image evaluation algorithms of the ADVANCE software, are used to capture and analyse these measurements.

Innovations for speedy sample preparation

Quick and easy to use with patented sample handling functionality and equipped with flexible heating options as well as a drop-tracking camera, the SDT elevates the spinning drop technique enabling advanced studies. An accurate infrared sensor measures the temperature contactless and reproduces the thermal conditions directly at the place of measurement.

Software that is workflow-orientated
The ADVANCE software focuses on simple automation with intuitive operation. SDT is completely software-controlled and uses prepared and easily modifiable templates. In addition to the Young-Laplace method, the SDT also analyses the drop shape using the traditional Vonnegut method. The SDT is packed with innovations to improve emulsion development.