An accurate determination and evaluation of the specimen deformation is a fundamental requirement in many material tests.

By using an extensometer for direct extension measurement all additional deformation as load frame, load cell, grips or fixtures or strain in the non-parallel section of the specimen is excluded. The w+b testing machines can be equipped with direct contact or non-contacting extensometers.
To challenge the wide range of applications w+b offers a comprehensive line of extensometers.

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