The body of the hardness testing instrument contains a cursor fitted with a screw lock and a round tip, compressed by one of the four springs corresponding to the four printed scales:
The spring force can be set by the “collar”; compressing the spring increases the force with which the tip is pushed on to the surface of the test piece.
By making short, straight movements while gradually increasing the load, the user can observe the force at which the tip leaves a mark or destroys the coating.
Each Elcometer 3092 Sclerometer Hardness Tester is supplied in a case with a 0.75mm (0.03”) diameter tungsten carbide tip and 3 springs (grey, red and blue). An optional green spring of 0 - 30N is also available.
|K0003092M201||Elcometer 3092 Sclerometer Hardness Testers - 3 ranges|
|Dimensions||165 x 24 x 16mm (6.5 x 1 x 0.6”)|
|Packing List||Elcometer 3092 Sclerometer, tool with 0.75mm (0.03”) diameter tungsten carbide tip, 3 springs (grey, red and blue), carry case and operating instructions|
AS 3894.4, EN 438-2, ISO 4586-2
|KT003092P001||0.5mm (0.02”) Tungsten Carbide Tip|
|KT003092P002||0.75mm (0.03”) Tungsten Carbide Tip|
|KT003092P003||1.0mm (0.04”) Tungsten Carbide Tip|
|KT003092P008||90° Diamond Point Cone, 90µm (3.54mils) Radius - ISO Type|
|KT003092P004||Grey Spring 0 - 3N (0 - 0.67lbF)|
|KT003092P005||Red Spring 0 - 10N (0 - 2.248lbF)|
|KT003092P006||Blue Spring 0 - 20N (0 - 4.49lbF)|
|KT003092P007||Green Spring 0 - 30N (0 - 6.74lbF)|
A quick and effective way to test coating hardness is the Scratch method, which is completed using a sclerometer, also known as a hardness pen or durotest stylus. So, how does it work?
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