What is strain gauge extensometer?

A strain gauge extensometer is a device used to measure the deformation (strain) of an object under stress. It consists of a strain gauge, which is a sensor that detects changes in resistance due to deformation, and a mechanical structure that ensures accurate placement on the test specimen. Extensometers are commonly used in materials testing to monitor how materials respond to applied forces, providing critical data for engineering and research applications. Their precise measurements help in assessing material properties and structural integrity.