The EasyDyne Tensiometer from KRÜSS is intended for portable use. Its low weight and extreme robustness, the possibility of operation by rechargeable batteries and its computer independence make it the ideal instrument for quality assurance in the lab or in the field. During its development KRÜSS concentrated on providing simple operation without making any concessions to the technical requirements. The sample table, which can be moved manually or motor-driven, allows samples to be changed rapidly; this is also made easier by the large illuminated sample chamber. During the measurement the built-in microprocessor controls the positioning of the sample automatically and precisely.

The firmware provides all the usual mechanical methods for measuring surface and interfacial tension; a useful tool for measuring the density rounds off the program. The semi-automatic operation and programmable procedures reduce both the measuring time and the necessary familiarization time to a minimum. Common correction methods for ring measurements and standardized statistical estimation of the accuracy are included; the result is shown on the easy-to-read display and can be stored in the memory if required. The automatic storage of measuring parameters and calibration data additionally results in considerable savings in time.

Whenever measuring problems have to be solved quickly and flexibly, both in the lab and on-site, EasyDyne is your reliable partner.

KRÜSS is taking new paths in the automated tensiometry field. Cooperation with Messrs. DIA‑STRON has meant that series of computer-supported contact angle measurements can now be carried out on fibers.

For some time now KRÜSS customers have been able to make use of the single fiber measurement technique with our tensiometers. The K100SF is equipped with a high-precision balance with which the contact angle can be measured between a liquid and a single artificial or natural fiber. The LabDesk tensiometer software ensures a fully computer-controlled procedure for the individual measurements. However, changing the sample had to be carried out manually and each measurement had to be started individually.

A new team now takes care of these time-consuming tasks: the LabDesk software together with a robot developed by DIA-STRON. Up to 50 samples are first arranged in a cassette. The series measurement is drawn up in LabDesk - thanks to the new add-in for batch contact angles this takes only a few seconds. The robot removes the samples in sequence and places them in the receiver of the Tensiometer K100SF, which then takes over and determines the contact angle fiber by fiber.


The cooperation with DIA-STRON also makes it possible to determine the wetted length of each fiber before the contact angle measurement. This is done by using a laser-scan micrometer, which measures the diameters of all the fibers arranged in the cassette – with an accuracy of better than
1 μm. The results are transferred to LabDesk and used for the following series contact angle measurements.