Entry-level Vickers hardness tester – optimal repeatability and easy operation

Duramin-4 – Manual Micro and Micro/Macro Hardness Tester

  • Methods: Vickers, Knoop and Brinell hardness testing
  • Load ranges: 10 gf-2 kgf, 1-62.5 kgf
  • Manual micro and micro/macro hardness tester
  • Automatic six-position turret
  • Manual XY-stage and Z-axis
  • Manual indent evaluation via an eyepiece

This entry-level range of microhardness testers primarily targets Vickers testing, but can also be used for Knoop and Brinell testing. The Duramin-4 testers are equipped with a combination of manual and automatic features to ensure easy operation. Duramin-4 is available in two load ranges; 10 gf – 2.0 kgf and 1.0 kgf – 62.5 kgf. 

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Accuracy and repeatability

Advanced load cell technology ensures that the Duramin-4 conforms to all operating standards, while offering consistent repeatability throughout the entire load range.

Easy operation

The display unit combines a touchscreen with a simple user interface, designed to be easy to use, yet robust enough to withstand the toughest production environment. The hardness evaluation takes place manually via an eyepiece, where the measurement lines are simply positioned around the indent.

Dedicated solution

Duramin-4 is ideal for use as a dedicated Vickers single task tester, both in a laboratory (M1) or more production-focused (M2) environment.


  • Duramin 4 Manual XYstage

    Manual XY-stage

    Using micrometer spindles, the sample is positioned manually. Simply turning the two spindles ensures that the XY-stage and sample can be positioned precisely under the objective lens.

    Manual XY-stage
  • Duramin 4 Manual zaxis

    Manual Z-axis

    Sample height is adjusted manually by turning a hand wheel. This positions the XY-stage and sample at the ideal working height.

    Manual Z-axis
  • Duramin 4 Manual evaluation via eye piece

    Manual evaluation via an eyepiece

    Indent evaluation is carried out via an eyepiece, and hardness value is displayed on the display unit.

    Manual evaluation via an eyepiece
  • Duramin 4 LED illumination

    LED illumination

    The illumination system is based on LED technology to ensure constant illumination intensity throughout the lifetime of the LED. This eliminates variations in indent evaluation that can be associated with other illumination sources.

    LED illumination
  • Duramin 4 Fast and easy exchange

    Fast and easy exchange of test methods

    Duramin-4 is available with a six-position automatic turret that facilitates the exchange of up to five indenters and four objective lenses. This eliminates the tedious task of continuously exchanging indenters and objectives lenses, avoiding subsequent calibration and potential human errors.

    Fast and easy exchange of test methods
  • Duramin 4 Flexible clamping

    Flexible clamping

    Several holders and clamping devices are available, suitable for both mounted and unmounted samples.

    Flexible clamping
  • Duramin 4 Available in two versions 1024x759 px

    Available in two versions

    Duramin-4 is available in a low load, low frame version, which is ideal for laboratory use, and in a high load, high frame version for use in a more production oriented or QC environment.

    Available in two versions


Model Types

Both Duramin-4 models come with an eight-inch touchscreen, manual indent evaluation via an eye piece, manual Z-axis, manual XY-stage (size 90 x 90 mm, stroke 25 x 25 mm), including manual micrometers. Both are equipped with a motorized, six-position measurement turret.

Duramin-4 M1

Duramin 4 M1
Low load hardness tester based on load cell technology Ideal for the automatic testing of Vickers and Knoop Test height 0-200 mm
Variants 10 gf – 2 kgf 1.0 kgf – 62.5 kgf
Low frame Duramin-4 M1  
Tall frame   Duramin-4 M2

Duramin-4 M2

Duramin 4 M2
Macrohardness tester based on load cell technology Ideal for the automatic testing of Vickers, Knoop, and Brinell With a test load range of 9.81 – 613.1 N (1.0 kgf – 62.5 kgf) Test height 0-400 mm

Struers’ equipment is in conformity with the provisions of the applicable international directives and their appurtenant standards. Struers’ products are subject to constant product development. Therefore, we reserve the right to introduce changes to our products without notice.

Technical Data

Duramin 4 Technical Sheet

Struers Technical Data Sheets are designed to help you make the best choice of equipment for your particular purpose. You can find important information such as capacity and performance specifications, dimensions, weight, electrical data, noise levels, ambient conditions, and safety. In many cases you can also obtain an overview of accessories offering higher capacity and performance.

Download Technical data sheet
Technical data sheets for the metallographic equipment for the sample preparation process from Struers

Ensuring certainty with Struers tailored support services

To optimize your processes, enhance your quality control performance and ensure equipment availability, we offer a wide range of services, training and support.

From preventive maintenance to training and process analysis, our Service Plans, Service Packages and Single Services are delivered by experienced technical service engineers and application specialists – and can be tailored to match your needs.

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Correct preparation solutions

"True structures require proper and correct applications. Different material properties require broad application knowledge. Struers application specialists are experts in optimizing preparation methods, because application knowledge is necessary to select the correct preparation solutions. Your material – our application solutions.”

Birgitte Nielsen
Application Specialist, Struers ApS

Go to Knowledge

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My relationship with Struers dates back over many years. The reason is their expert advice, good service, and their use of our application laboratory in the case of difficult questions that are best resolved on-site. WWU Münster, Institut für Planetologie Ursula Heitmann Mineral Specimen Preparer
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We have been using Struers equipment and consumables for almost 30 years and have benefitted enormously from their unparalleled service and applications support. John Crane UK Ltd. UK Bill Taylor Materials & Forensics Engineer
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