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.
Scientific technologies for precise interface characterization.
This tensiometry method goes back to the methodology called ADSA, which was developed by Neumann and his team after the modern video technique became available and computers were powerful enough for managing large computational work in a reasonable time. Now, this method of determining the surface and interfacial tension from the profile of pendent and sessile drops is the most frequently used technique and various commercial instruments are on the market.
Explore PAT Series →
The idea of measuring the surface tension from the maximum pressure in a bubble is old, however, the possibility to do this in an accurate way and to receive experimental data over a broad adsorption time interval is rather new. The measurement principle is just to determine accurately the pressure change in a bubble during its continuous growth at the tip of a capillary. The maximum of this pressure signal provides the surface tension values for the given liquid.
Explore BPA Series →The ring and plate tensiometry belong to the classical methods for measuring the surface tension of liquids. Due to wetting problems, their use for liquid/liquid interfaces requires a lot of special care and PAT is superior and therefore highly recommended. The principle of this type of tensiometry is to determine the weight of a liquid meniscus formed at a solid body in contact with the liquid. Most frequently rings of a rather thin platinum wire or thin platinum or paper plates are used. A temperature control for the measurement is possible, however, the range is quite narrow due to the required access for the sensible weight measurement. Our STA is based on a standard electronic microbalance, which can then also be used for routine weight measurements.
SINTERFACE
Advanced scientific instruments for the characterization of liquid interfaces, foams, and emulsions. Designed in Berlin, used by leading laboratories worldwide.
© 2026 SINTERFACE Technologies. All rights reserved.
