ProTech offers a wide range of measuring devices for the analysis of the chemical and physical properties of surfaces and interfaces...
- Optical contact angle measuring and contour analysis systems
- Dynamic contact angle measuring devices and tensiometer
- Spinning drop tensiometer and analysis systems for liquid dispersions
The measuring devices are complemented by an extensive array of accessories and extensions like, for example, a humidity generator. Hence, a tailor-made combination of measuring device and accessories can easily be found to take on your individual surface and interfacial measuring challenges.
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DCAT – Dynamic Contact Angle measuring devices and Tensiometer
The dynamic contact angle measuring instruments and tensiometers of the DCAT series are multi-functional instruments for the force-based measurement of various surface and interfacial properties like surface tensions, critical micelle formation concentration, adhesion or surface pressure. A wide range of test bodies and sample holders as well as specific upgrade modules are available for the different measuring methods. Based on a well-established and accepted measuring technique and utilising state-of-the-art weighing technology, the highest precision and reproducibility of the measured results is guaranteed.
Application Focus
- surface tension and interfacial tension measurements using standardised test bodies like Du Noüy rings or Wilhelmy plates
- fully automatic determination of the critical micelle formation concentration (CMC)
- dynamic contact angle measurements
- density determination for liquids and solids
- sedimentation and penetration analysis
- surface pressure analysis with a Langmuir Trough
- force of adhesion determination
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OCA – Optical contact angle measuring and contour analysis systems
The optical analysis of drops that hang from a dosing needle or are placed on a solid surface facilitates the determination of different surface and interfacial parameters. The optical contact angle measuring and contour analysis systems of the OCA series combine high resolution optics, exact liquid dosing and precise sample positioning into powerful and reliable measuring systems.
Application Focus
- static and dynamic contact angle measurement using the sessile drop method
- determination of surface energy of solids
- optical determination of surface tension and interfacial tension using the pendant drop method
- fully automatic sample mapping
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ZPA – Zeta Potential Analyzer
The Zeta Potential Analyzer ZPA 20 is a compact measuring instruments that utilises the patented bidirectional oscillating streaming potential method. It is designed to measure the zeta potential of various macroscopic solid samples with highest accuracy and within shortest time. With its powerful stepping motor and innovative method, the ZPA 20 can measure zeta potential values in less than a minute and with high statistical quality.
Application Focus
- Measurement of Zeta potential on plate shaped solids, fibres, powders and granulate materials
- Determination of the isoelectric point
- Adsorption kinetics of surfactants, polymers, etc.
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MS – MultiScan dispersion stability analysis system
The MultiScan MS 20 is the measuring device for the automatic optical stability and aging analysis of liquid dispersions, in particular suspensions and emulsions, and the comprehensive characterisation of time- and temperature-dependent destabilisation mechanisms.
Application Focus
- optical stability and aging analysis of liquid dispersions
- determination of destabilisation mechanisms
- determination of sedimentation and creaming rates
- analysis of particle merging and clustering
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SVT – Spinning drop Video Tensiometer
The Spinning drop video tensiometers of the SVT series are compact optical measuring instruments for the determination of low to ultra-low interfacial tensions and rheological interface properties. Powerful device components like automated camera positioning, a precision drive and temperature-controlled measuring chambers guarantee accurate and reproducible measurement results. Convenient fast-exchange capillaries and an intuitive control via the TP 50 control panel ensure flexible sample handling and easy operation.
Application Focus
- measurement of low to ultra-low interfacial tension, e.g. for microemulsions used in enhanced oil recovery (EOR)
- interfacial rheology
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SPA – Surface Profile Analyzer
The Surface Profile Analyzer SPA 25 can measure surface topography and roughness parameters with exceptional speed and resolution.
Application Focus
- visualisation and analysis of surface topography with down to 0.1 nm height resolution
- evaluation of surface roughness according to various industry standards like ISO 25178, ISO 4287, ISO 13565, ISO 16610, etc.
