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Krüss SDT

  • Measurement of interfacial tension in an extremely wide range
  • Diverse range of applications in surfactant and emulsion analytics
  • Measurements under the temperature conditions of mixing
    processes or oil reservoirs
  • Camera system: fps at 2560 × 1920 px

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Measurement of interfacial tension in an extremely wide range with especially simple sample exchange

The Spinning Drop Tensiometer - SDT measures interfacial tension with a high degree of accuracy and a particularly wide measuring range. The SDT is the ideal solution for the quality control and development of emulsions and surfactants thanks to its enormous bandwidth, small sample volumes and simple handling during preparation. Exact capture of extremely low interfacial tensions also makes the SDT an instrument particularly well-suited for analyzing the interfacial behavior of mini emulsions and micro emulsions, for example for tertiary oil recovery or the pharmaceutical branch.

Exact rotation, image evaluation and drop positioning
With the spinning drop method, measuring of the interfacial tension is carried out by analyzing the video image of a drop surrounded by fluid in a rotating capillary.The accuracy of the video analysis and the rotational speed are decisive for the precision of the spinning drop method. That is why a high-resolution USB3 camera and an exactly controlled precision motor with excellent speed constancy are among the most important components of the SDT, combined with the intelligent and robust image evaluation algorithms of the software ADVANCE.

Innovations for speedy sample preparation
One of the outstanding features of our SDT lies in the especially simple procedure for changing the samples. The novel concept for preparing the capillary, which has two patents filed by KRÜSS, significantly reduces the often laborious preparation otherwise involved in a spinning drop measurement

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Specifications

Specifications

Camera system
fps at 2560 × 1920 px

Optics
Focus: fixed
Zoom: 1.4× zoom, fixed
Field of view: 6 mm × 4.5 mm
Resolution: 2.3 μm

llumination
Type: High power monochromatic LED and stroboscope
Wave length, dominant: 469 nm
Field of light: 57 mm × 7 mm (D × H)

Sample stage
Tilting: ±20°
Resolution: 0.1°

Capillary drive
Resolution: 0.1 rpm
Long term stability: ±1 rpm

Spinning drop
Result: Interfacial tension (IFT)
Range: 10^6 to 2000 mN/m
Resolution: 10^6 mN/m

Temperature control
Electric
Range: ambient to 120 °C
Resolution: 0.1 °C

Liquid
Range: -10 to 120 °C
Resolution: Depending on external circulator
External circulator: Optional

Dimensions
360 (W) x 240 (D) 325 (H) mm

Weight
15 kg (without accessories)

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