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Extensometer Market: Introduction
Extensometer was invented by Charles Houston in 1879. Houston later gave rights to Fairbanks & Ewing (a manufacturer of scales and testing machines). Traditionally, extensometers are the most convenient and widely used instruments for the measurement of strains in a material test specimen. These extensometers are based on contact techniques. However, non-contacting optical techniques are becoming more important. An extensometer is an instrument used to check the changes in the dimension (especially length) of an object.

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