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Drop Shape Analyzer


The semi-automatic premium solution for wettability analysis

Drop Shape Analyzer – DSA100S for wettability analysis

The Standard configuration of the DSA100 Drop Shape Analyzer system solution is designed for the semi-automatic measurement of the static and dynamic contact angle and the scientific assessment of wettability by means of the surface free energy (SFE).


The instrument, which is equipped with a robust housing, is well-suited for the reliable quality assurance of surface pre-treatment processes as well as the development and optimization of wetting and coating procedures. Accessories for ultrafast one-click SFE measurement as well as wetting analysis at higher temperatures enhance the spectrum of the instrument.


  • Quality assurance and optimization of activation processes such as plasma treatment, flame treatment, or corona treatment before coating or bonding

  • Analyzing wettability of plastics, glass, ceramics, wood, paper, or metal

  • Analyzing the effectiveness of hydrophobic coatings and other coatings

  • Analyzing surface cleanliness

  • Wetting analysis at controlled temperature

Measuring methods

  • Contact angle of a drop on a solid surface

  • Contact angle using a gas bubble beneath a solid surface in a liquid

  • Contact angles of two drops dosed in parallel

  • Surface free energy of a solid using contact angle data

  • Roll-off behavior and advancing/receding contact angle of a drop on a tilted surface

  • Surface tension using the curvature of a perfectly symmetrical drop on a circular sample pedestal

  • Contact angle at an immersed, cylindrical sample, usually a fiber

  • Carrying out a measurement up to 20 consecutive times and displaying the results together

  • Remote control of ADVANCE for integration in custom-designed, complex automations

Measuring results

  • Static contact angle

  • Advancing and receding contact angle

  • Contact angle using a bubble in a liquid

  • Surface free energy (SFE) according to the following models: Owens-Wendt-Rabel-Kaelble (OWRK), Fowkes, Wu, Zisman, Equation of State

  • Temperature

The DSA100: Why we call it premium

Comprehensive and versatile wetting and adhesion analysis for almost all surfaces and tasks: see what’s possible with the DSA100.

Controlled drop dosing and easy sample positioning

With the DSA100S, dosing is carried out under software control. Accurately adjustable drop volume and speed ensure repeatable conditions and user-independent results, which is vital for quality control.


Precise measurements of the advancing and receding angle run smoothly thanks to the adjustable dosing dynamics. This measuring mode leads to a statistically significant mean value for the measured sample position.

The DSA100S is also equipped with three manual axes for moving the sample to the required positions quickly and precisely without having to touch the sample.



Reliable drop shape analysis thanks to high imaging quality

The DSA100S features a high-resolution camera and a quality zoom lens for accurate display of the drop with optimum size. The high image quality that this achieves leads to a precisely measured contact angle. Combined with the intelligent image evaluation algorithm of the ADVANCE software, drop shape analysis with the instrument provides exact results.



Protective housing and time-saving setup

The robust housing of the DSA100S protects sensitive components such as the camera and also minimizes the troublesome effect of vibration.


Adjusting the viewing angle, which is often necessary when measuring the contact angle, is particularly easy since the position of the drop in the image does not change during this step. As a result, the otherwise necessary tracking of the sample height is eliminated. This is possible thanks to a special optical arrangement, which also creates space for large samples.



Software procedures for accurate time control

The ADVANCE software can automatically start the measurement process immediately after dosing, thus enabling raw data to be recorded without losing any time. This is particularly important for samples that show a time-dependent wetting behavior.


Liquid Needle dosing

Surface free energy in seconds

With the Liquid Needle, the contact angle measurement technology is perfectly prepared for quality assurance as well as R&D. Learn more about the ideas that enable the Liquid Needle to combine speed with scientific excellence.

Dosing automation at the highest level

Equip your instrument with the optional Dosing Hub, our flexible positioning and changing system for up to three combinable dosing units. Together with software-controlled dosing solutions, the system performs automatic and fast surface free energy measurements with up to four liquids, for example. The Dosing Hub also integrates temperature-controlled dosing units and other special solutions.

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Satisfied voices

The KRÜSS Drop Shape Analyzer is a very well designed and user-friendly system. We are happy with the performance and capability it offers. The local representative is very responsive and helpful!

Yan Yang

Failure/Materials Analysis Manager, Google Nest Labs


  • Intuitive software with a workflow-oriented user interface

  • Swift and repeatable analyses thanks to measurement templates and powerful automation functions

  • Superior algorithms for image analyses provide for precise results even with difficult images

  • A wide range of evaluation methods makes ADVANCE a reliable scientific tool

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