Spinning drop tensiometer ? SVT 25

SVT 25 – Precision Spinning Drop Tensiometer for Ultra-Low Interfacial Tension Analysis

The SVT 25 Spinning Drop Tensiometer from DataPhysics Instruments is a cutting-edge solution for measuring ultra-low interfacial tensions and evaluating interfacial rheological properties with exceptional precision. This instrument is particularly suited for applications in enhanced oil recovery (EOR), surfactant research, and emulsion stability studies where precise data on fluid interfaces is essential.

Using the spinning drop method, the SVT 25 analyzes the shape of a drop of lighter liquid within a heavier liquid while rotating at high speeds—up to 20,000 rpm. By observing the elongation of the drop, the instrument accurately calculates interfacial tension values, including those below 0.01 mN/m.

The system is equipped with a high-speed camera and zoom lens to capture sharp, detailed images of the drop in motion. The temperature-controlled measuring chamber (ranging from -30 °C to 180 °C) allows for stable and reproducible measurements even under extreme conditions.

An intuitive TP 50 touchscreen control panel simplifies operation and ensures precise management of measurement settings. Its user-friendly interface, combined with advanced image processing software, makes the SVT 25 ideal for both research and industrial quality control.

Whether you’re developing advanced materials or improving product formulations, the SVT 25 delivers unmatched accuracy in interfacial tension measurement.

The Spinning Drop Tensiometer – SVT 25 is a high-precision optical instrument designed to measure ultra-low interfacial tensions and rheological interface properties with exceptional accuracy and reproducibility. It is widely used in applications such as surfactant analysis, emulsion research, and enhanced oil recovery (EOR), where precise interfacial tension measurements are crucial. The instrument incorporates state-of-the-art mechanical, optical, and electronic components, making it a powerful and versatile tool for both research and industrial applications.

Features of Spinning drop tensiometer – SVT 25

• Measurement of low to ultra-low interfacial tensions based on the contour of spinning drops according to models by Vonnegut, Cayias-Schechter-Wade or Young-Laplace
• highly dynamic measurement drive with 0 … 20000 rev/min
• oscillation measurements with oscillation periods of 0.5 s …∞ and max. acceleration of 500 rev/s²
• motorised tilting table
• fast 6.5-fold zoom lens with integrated continuous fine focus
• motorised movable optics for automatically following moving drops
• high-performance camera with USB 3 interface, 2/3″ sensor, max. 2048 x 1088 pixel, max. 3250 frames/s
• precise, fast and easy to use capillary exchange system
• LED-lighting with strobe function and adjustable slit diaphragm
• Temperature controlled measuring cells for temperatures ranging from -30 °C to 180 °C
• Special capillary for measuring water-based solutions at up to 130 °C
• automatic calibration function for correcting optical distortions caused by the capillaries (cylindrical lens effects)
• TP 50 control panel with touch screen and precision control wheel