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Drop Shape Analyzer


Automatic wettability analysis of large surfaces

Drop Shape Analyzer – DSA100L for wettability analysis of large samples

The Large version of the DSA100 Drop Shape Analyzer is prepared for automated wettability analysis by means of the contact angle or even the surface free energy. Fitted in a particularly wide frame and equipped with a large, rotating sample table plus an extra-long movement axis, the instrument can handle samples of an area of up to 500 × 500 mm.


  • Characterization of large pre-treated or coated surfaces

  • Investigation of the cleanliness of windows and frames

  • Surface analysis for monitors and touch panels

  • Characterization of automobile parts before coating or bonding

  • Hydrophobicity analysis of ceramic tiles

Measuring methods

  • Contact angle of a drop on a solid surface

  • Contact angles of two drops dosed in parallel

  • Automated position-dependent contact angle measurement and evaluation

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

  • Surface free energy of a solid using contact angle data

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

  • 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 of a solid body

  • Contact angle using a bubble in a liquid

  • Surface free energy (SFE) according to the following models: Owens-Wendt-Rabel-Kaelble (OWRK), Fowkes, Extended Fowkes, Van Oss & Good (Acid-Base), Schultz, Wu, Zisman, Equation of State

  • Position-dependent contact angle and SFE

  • Temperature

  • Drop Shape Analyzer – DSA100L for wettability analysis of large samples

    The optional Liquid Needle enables measurements of the surface free energy in seconds.

Fast and automatic measurement at any position

The heart of the DSA100L is a software-controlled setup of a large rotating sample table mounted on an extra-long horizontal axis. With this arrangement, every position on the sample can be accessed quickly, automatically and accurately for measuring the contact angle.


The dosing unit produces drops with precisely adjusted volume, which guarantees exactly reproducible measuring conditions. The gentle depositing of the drop and our dynamically controlled dosing system prevent measurement deviations caused by unintentional pre-wetting.



Software-controlled analysis of the whole sample

The ADVANCE software controls the measurement automatically based on standardized measuring procedures. In doing so, positions, which have been defined and stored in advance, are approached and measured one after the other. This ensures a fast and completely standardized measuring procedure with high sample throughput.



Reliable drop shape analysis thanks to high imaging quality

The DSA100L 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.


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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  • 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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