Our main expertise is the development of measuring instruments for the characterization of interfaces. One group of instruments is dedicated to measurements of dynamic surface and interfacial tensions. These are the most frequently used methods for characterizing liquid interfaces. Our portfolio comprises of instruments for the maximum bubble pressure (BPA), drop volume (DVA), drop/bubble profile analysis (PAT) and capillary pressure tensiometry (DPA). The PAT is also suitable for contact angle measurements of a liquid drop sitting on a solid surface. Belonging to the classical tensiometry methods, we also provide a ring and plate tensiometer (STA) which is also suitable for measuring the receding/advancing contact angle. In addition we provide instruments for the investigation of the interfacial dilational and shear visco-elasticity, such as slow oscillating drop profile analysis (PAT), fast oscillating drops and bubbles (ODBA) and the interfacial torsion pendulum shear rheometer (ISR). ODBA is additional equipment for PAT. Very recent developments were dedicated to some special equipment, such as the drop volume exchange using a coaxial double capillary with a double dosing system (PAT). Moreover, we have designed a special drop and bubble micromanipulator (DBMM), which is a unique device for mimicking the situations in foams and emulsions by manipulating two drops or bubbles against each other. To better understand foams and emulsions, we designed a liquid film analyzer (TFA) to measure the stability and thickness of foam and emulsions films. A new foam analyzer (FA) is presently in development and will provide the user with a device for characterizing the foamability of a solution, its stability and drainage behavior.

Video cameras with high frame rates and high resolutions are a new product line of SINTERFACE. These cameras have been mainly developed as necessary equipment for our tensiometers PAT and ODBA, and for the DBMM, however, they all can be used as stand-alone products for any type of high speed recording. The formats of the video sequences correspond to international standards so that various types of image analysis software can be applied for the quantitative interpretation of highly dynamic processes.

The concept of our interfacial and video instruments includes direct internet access as well as external input and output channels. These features make all devices suitable for the automation of technological processes. For the BPA, for example, we have a feedback control for the situation when the surface tension of a respective liquid is changed such that it value is below or alternatively above a programmable critical value.


New Developments 2/1/24

A new generation of bubble pressure tensiometers, including BPA-2P and BPA-2S , as follow up developments of the excellent predecessors BPA-1P and BPA-1S , are available more...

New Books 2/1/24

Textbook “Dispersionseigenschaften - Stabilität, 2D-Rheologie, 3D-Rheologie“ This textbook contains the main fundamental knowledge on interfaces, colloidal systems more...

Latest events 2/1/24

Workshop Rheology and Stability of Disperse Systems, Mai 13-15, 2024, Potsdam, Germany In May 2024 the Rheology and Stability of Disperse Systems user workshop is scheduled more...