Simultaneous dosing and analysis of two drops obviates the need to change the test liquid during the material testing, as is the case with conventional dosing units. The dosing system is specially developed by KRÜSS. It doses two parallel drops within milliseconds, with high volume precision and minimal kinetic energy. In spite its high speed the procedure resembles the gentle way of placing a drop with a dosing needle. The contactless method, without the usual dosing needles, prevents undesirable contact with the sample and possible damage or contamination of the probe.
Cartridges filled with the test liquids – usually water (polar) and diiodomethane (non-polar) – ensure that the dosing operation is easy to handle. Furthermore, an alternative dosing solution was created for liquids which require extensive cleaning effort such as adhesives, inks or paints. The dosing system can quickly be changed to an automatic syringe dosing module, which uses conventional disposable syringes.
Due to its use with a notebook and USB power connection, its low weight and small footprint the MSA is specially designed for mobile and non-destructive quality control. The instrument measures samples of any size, such as automobile bodies, and provides reliable values, even for vertical surfaces such as shower walls and for convex surfaces.
The modern, intuitive software automatically calculates the surface free energy based on proven and meaningful scientific models. For example, precise information relating to the polarity of the surface provides a reliable indication of the effect of activation by such methods as plasma treatment. Thanks to the simple measuring sequence and the software''s clear user guidance, measurement errors due to incorrect operation are virtually ruled out.