SUrface and coating scratch testers


Surface and coating scratches are the type of mechanical failures that can happen in product manufacturing, assembly, shipping and normal handling by the final user. They can deteriorate the final product look and sometimes even lead to more dramatic types of failures due to incorrect coating formulation, surface preparation, application, drying and curing times, as well as the exposure to the environment. This is why, when the total product life-cycle is considered, it’s important to understand how coatings behave under mechanical stress. 

We at Fischer have developed a truly unique range of scratch testing machines that allow you to precisely characterise adhesion and cohesion properties of coatings, using optical microscopy, friction force measurements and acoustic emission measurement. High resolution (XY: +/-0.5μm) XYZ stage allows you to precisely control stylus application and test speeds. Meanwhile, constant, progressive and incremental measurement modes allow you to accurately test how coatings behave under various conditions.


Measurements in the load range of 10mN-30N


Measurements in the load range of 1-200 N

The measuring head contains a standard spherical diamond-tipped cone with 120° angle indenter, the test load generating unit, and the position measurement unit for determining the indentation depth. There’s also always an option to upgrade to other indenters that can be supplied on request. The controlled touchdown of the measuring head leads to a very small machine compliance, allowing much more accurate test results. 

Powerful high-resolution microscope on ST30 and ST200 allows to focus in exceedingly small areas. The standard lens comes with x5 and x20 with a video-picture in the software of the area 2,688μm x 2,150μm and 672μm x 538μm, respectively. Meanwhile, automatic image recording software allows to capture the whole length of the scratch and easily mark main failure modes (Lc).

ST Scratch Tester Features and Benefits

  • Various measurements modes: contact, progressive and incremental loads
  • Samples holder can be customised to fit specific applications
  • Measurement and computation of material parameters according to DIN EN ISO 14577-1 and ASTM E 2546Measurement of material parameters according to ASTM C1624, ISO 20502 and DIN EN 1071-3.
  • Allows the measurement of coatings as thick as 1,600μm.
  • Programmable XY-Stage and Z-Axis can be automated to measure several scratches simultaneously
  • Measurement on curved surfaces with motion feedback control
  •  WinFTM software for seamless measurements, data collection and processing comes pre-installed on PC or laptop.
  • Instant results, easy data extraction and reporting allows a high throughput of samples.

Service and Applications Support

Your application challenges are our prime focus. We’ve built two state-of-the-art laboratories in Lymington and Nottingham, where our technical experts with more than 25 years of experience are eager to help you. We’re always available to assist you with choosing the right instrument, developing a new measurement approach, testing samples, defining an appropriate application, and creating a compelling case study or a report to prove your ideas.

At the same time, our service department ensures almost an instant response to any of your requests, with an average turnaround time of 48 hours to resolve outstanding issues and enough engineers in your area who are available to travel on-site to support you.

Can’t purchase the instrument outright? It’s not a problem! With our highly trusted financial partner First Capital Finance Ltd., we offer to spread the cost of the instruments over three or five years. Contact us to learn more.

Fischer Instrumentation offers one year warranty on all of the instruments supplied. This fully covers you for any unexpected breakdowns or issues you may encounter.


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