DSA Drop Shape Analyser

The KRUSS DSA25 Drop Shape Analyser is an easy-to-use, reliable instrument for measuring contact angle. From a simple wetting test to the accurate measurement of surface free energy (SFE), the robust instrument provides flexible options for analysing wetting and adhesion on solid surfaces. Its rapid, manual sample positioning makes the DSA25 outstandingly suitable for occasional wetting measurements with changing tasks and sample types.

Surface free energy in seconds
The Liquid Needle is a novel dosing method that offers a fast and reproducible way of placing drops on solid surfaces with minimum kinetic energy using a very thin jet of liquid instead of a solid needle. The Liquid Needle dosing technology performs rapid one-click measurements of the surface free energy (SFE) based on contact angles of two liquids. The additional syringe dosing unit can be used to add data for a third liquid to consolidate the SFE result or to measure the surface tension (SFT) of a liquid.

Reliable drop shape analysis thanks to high imaging quality
A high-resolution camera combined with a high-quality zoom lens ensure an accurate determination of the drop with optimal size which leads to a precisely measured contact angle or surface tension (SFT). The optional tilting table allows the analysis of (super-) hydrophobic and self-cleaning surfaces automatically by means of the contact angle and roll-off angle.

Maximum repeatability and comprehensive adhesion analysis
The ADVANCE software supports the Liquid Needle in order to carry out automated SFE measurements within seconds. The easy-to-create automation programs can also be used to design a standard procedure for sample analysis to maximise repeatability of measurements. Optional software tools for data analysis combine SFE and SFT data in order to assess the adhesion and calculate other parameters of the solid/liquid contact.

The KRUSS DSA30 is a robust Drop Shape Analyser which offers the flexibly needed for precise measurement of contact angle and surface free energy. With high-quality components and various automation options, the DSA30 analyses wetting and adhesion on solid surfaces. Fast measurements and simple operation make the instrument a valuable part of quality control.

Reliable drop shape analysis with high imaging quality
A high-resolution camera combined with a high-quality zoom lens ensure an accurate determination of the drop with optimal size which leads to a precisely measured contact angle or surface tension (SFT).

Analysing solids with up to four liquids
The DSA30E is equipped with the Dosing Hub for fast positioning and control of the dosing units. It combines the automatic Liquid Needle for fast and gentle dosing and allows automatic, fast, reliable surface free energy measurements with upto four liquids. Alternatively, the DSA30E works together with a multi-dosing system with four syringes.

Picoliter droplets for very small surfaces

The DSA30M is designed for standard wettability analysis using known liquids, while the DSA30M Flexible Liquid is specifically designed for analysing the wetting behavior of a broad range of liquids, including liquids that contaminate or harden or those that might contain particles such as blood or paints. Using disposable cartridges, the dosing unit can place tiny drops down to a volume of 10 picoliters on tiny surfaces like semiconductors, fiber, hair, parts of mechanical watches etc.

Automated positioning for complete sample analyses
The DSA30E is fitted with three software-controlled axes that can move the sample quickly and accurately to all programmed measuring positions. This makes it possible to complete standardised analyses, which is ideal for quality control. Wetting can be analysed on the sample position to check for homogeneity or to assess differences between coated and uncoated areas.

Maximum repeatability and comprehensive adhesion analysis
ADVANCE software easy-to-create automation programs can design standard procedures for fully automated sample analyses in no time at all. Optional software tools for data analysis combine SFE and SFT data in order to assess the adhesion and other parameters of the solid/liquid contact.

The KRUSS DSA100 is a high-performance Drop Shape Analyser that delivers a range of benefits for wetting and adhesion analysis of solids and liquids particularly to characterise surfaces and surface coatings (wettability). The system is designed to be modular, from the basic unit for precise measurement of static and dynamic contact angle to the fully automatic expert instrument for serial measurement of surface free energy (SFE) of a solid sample and the surface tension of a liquid.

The high level of automation with easily programmable procedures ensures user-independent results for contact angle and surface tension. The DSA100 is widely used in both quality control and research and development because of its versatility in controlling thermal conditions, dosing solutions and intelligent software tools for analysing solid-liquid contact.

With up to three axes for sample positioning, the sample is moved quickly and reproducibly to the measuring positions. Measurement of the contact angle with up to 8 liquids ensures maximum accuracy when determining the SFE. Using a very thin jet of liquid instead of a solid needle, the novel dosing method called the Liquid Needle, delivers precisely controlled drops on solid surfaces with minimum kinetic energy, allowing the SFE to be determined quickly and reliably.

Precisely controlled temperature and humidity chambers help to provide modeling of real process conditions. Special sample tables optimise the investigation of wafers and ultrahydrophobic surfaces. High-tech solutions for optical components enable a time-saving, automatic image setup, and measurement of extremely fast wetting processes. They also allow measurements to be made on microscopically small samples.

Comprehensive analysis of solids and liquids
DSA100 measures the surface tension of liquids using the Pendant Drop method to provide a picture of the interface contact, which can be used to optimise the adhesion and long-term stability of coatings. Other solutions for measuring the liquid-liquid interfacial tension, for measurements at high pressures and for surface rheology make the DSA100 a universal instrument for interface research. The tilting table for the DSA100 enables users to analyse (super-) hydrophobic and self-cleaning surfaces automatically by means of the contact angle and roll-off angle.

ADVANCE – our intuitive software solution for your measurement tasks
The simple operation of the instrument goes hand-in-hand with the clear user guidance of our ADVANCE software. The relevant functions for each particular step are arranged in tiles which display all elements necessary in the context. By avoiding the use of menus and pop-ups, ADVANCE saves any unnecessary clicks and time-consuming searches for hidden elements. Software controlled automatic sequences provide high reproducibility and reduce the user’s influence on the results.