An extensometer is a device that is used to measure small/big changes in the length of an object. It is useful for stress/strain measurements and tensile tests Hylec Controls supplies the Video and Laser Speckle Extensometers from Messphysik used for measuring the tensile extension of metals and other materials remotely, bi-axial or axial averaging extensometers, high temperature, transverse and diametral, fracture mechanics and material test options. Clamp-on extensometer devices can also be supplied that physically attach to the materials under test.

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