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Mobile Surface Analyzer

MSA One-Click SFE

Analyzing wettability in a second with only one click

Mobile Surface Analyzer – MSA One-Click SFE for wettability analysis

A powerful instrument for quality control of pretreated, coated, or cleaned surfaces: The MSA One-Click SFE Mobile Surface Analyzer measures wettability by means of the surface free energy automatically and extremely fast.


With just one click, the MSA doses parallel drops of two liquids, followed by the direct analysis of the contact angles and the derived results of the surface free energy. All steps are automated and happen within a second. The result allows well-founded statements about the general wettability by aqueous or organic liquids as well as the adhesion.


Thanks to the reliable and pre-defined measuring procedure, user-independent results are guaranteed and errors due to incorrect operation are virtually ruled out.


  • Determination of wettability before coating or bonding

  • Quality assurance of activation processes such as plasma treatment, flame treatment, or corona treatment

  • Quality assurance for the cleaning of surfaces

  • Testing the effectiveness of hydrophobic coatings and other coatings

  • Measurement on large workpieces and finished products such as car bodies, aircraft parts, or walls

Measuring methods

  • Contact angles of two drops dosed in parallel

  • 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

  • Contact angles of two liquids

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

  • Work of adhesion between solid and liquid

  • Interfacial tension between solid and liquid

  • Spreading coefficient between solid and liquid

Instrument Care Package

The all-around solution for your success

9 Services at once

Make the best use of your instrument with our all-around service including application advice and a fast lane to our technical support. Never worry about repairs, downtimes, missing new functions – not even about damages you may inflict! Available in almost all European countries.

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Analyzing wettability with one click

Experience how much time and effort the MSA One-Click SFE spares when doing quality control for cleaned, coated, or pretreated surfaces.

Simple in operation and versatile in use

The MSA One-Click SFE is optimally equipped for the mobile and non-destructive quality control due to the power connection to a notebook and its low weight and small footprint. The instrument analyzes samples of any size, such as automobile bodies. It provides reliable values even when measuring vertically or overhead and also works on slightly convex samples.


The intuitive ADVANCE software for the instrument uses proven scientific methods to calculate the surface free energy. Notably the determined polarity of the surface gives direct feedback to the effect of pretreatment methods such as plasma treatment.

Made for mobile quality control

Many features for easy and reliable wetting analysis: the MSA One-Click SFE makes test inks and dyne pens matters of the past.

Innovative Liquid Needle dosing technology

The integrated Liquid Needle dosing unit dispenses two parallel drops within milliseconds with high volume precision. This simultaneous dosing of two drops eliminates the need to change the test liquid during the measurement, as is the case with conventional dosing techniques. The kinetic energy is kept low in order to prevent unwanted prewetting of areas around the drop, which could falsify the result.


Cartridges that can easily be refilled outside the instrument make for simple operation of the dosing system. Fully charged, the instrument is capable of dosing 1000 droplets of each liquid.

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The story of the revolutionary Liquid Needle dosing technology

Only with the Liquid Needle is the contact angle measurement technology really ready for quality assurance. Learn more about the ideas that enable the Liquid Needle to combine speed with scientific excellence.

The Liquid Needle vs. ballistic dosing

Letting a drop fall onto a surface or even shooting it may be fast but puts far too much energy into the surface contact. Even if the drop doesn’t splash, at the very least its shape gets distorted and gives false results. The very fast Liquid Needle uses just the right amount of pressure to create a jet so thin that distortion cannot spread to the drop’s outer line where the analysis takes place.

Liquid Needle – a fast alternative to the solid needle

Repeatability and reproducibility are the keys to a good measurement. This is why for control quality the first step is to have full control over the test method. The Liquid Needle leaves nothing to chance and enables a completely automated procedure with no operator-to-operator variation. Download this peer-reviewed study that proves that the Liquide Needle is as scientifically valid as the classic solid needle dosing.

Download application report
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Mobile Surface Analyzer – MSA One-Click SFE for wettability analysis

Take your QC lab wherever you go

A dosing unit for two liquids. A camera with a lens. A light source and an aperture. Lots of electronics. In a nutshell, that’s what it takes to automatically determine the SFE. Having all these parts tightly packed in a durable, hand-held instrument makes the MSA a small miracle.

Mobile Surface Analyzer – MSA One-Click SFE for wettability analysis

Measure without size limit at any position in space

The compactness of the MSA is only surpassed by its versatility. You can use it on samples as thin as a chopstick or as large as a car body. It works on curved surfaces, vertical walls, or overhead. Believe it or not, promising tests are even being made at zero gravity.

Mobile Surface Analyzer – MSA One-Click SFE for wettability analysis

Heavy-duty construction with a light touch

Once you have verified that your surface meets all of your quality standards, you certainly don’t want it to be spoiled by the measurement. With that in mind, the MSA’s small, soft footprint leaves no traces on the sample except two micro-drops of pure liquid.


Constructed with chemically-resistant parts and enclosed by a high-grade metal housing, the instrument is robust and ready for the factory floor.

Mobile Surface Analyzer – MSA One-Click SFE for wettability analysis
Mobile Surface Analyzer – MSA One-Click SFE for wettability analysis
Mobile Surface Analyzer – MSA One-Click SFE for wettability analysis

Faster and more reliable than test inks

Estimating the surface free energy (SFE) using manual brushstrokes of a series of liquid mixtures frequently gives misleading results. In contrast, the MSA determines the SFE scientifically using the contact angle as a direct measure of wettability. Since it does its analysis even faster than test inks, there is no reason to hold on to this ancient method.

Download application report

Satisfied voices

We have been very impressed with the KRÜSS Mobile Surface Analyzer. It is user friendly, reliable and the software is excellent. It has provided us with ability to perform rapid measurements on a variety of surfaces.

Andrew Lee

Material Development Scientist, Crown Cork

The contact angle measuring instrument MSA is exactly tailored to our needs. The cooperation - especially the support during the learning phase - was excellent.

Hans-Christoph Thielemann

Product Engineer, Sika

We have extensively used the KRÜSS K100 Force Tensiometer and Mobile Surface Analyzer in a variety of projects and have found them to be invaluable instruments. The much-needed repeatability and precision of the instruments gives us high confidence in the data we produce.

Geoff Allen

Member of Research Staff, Xerox Research Centre of Canada


  • 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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