Why Are More and More Tensile Tests Choosing the Haytham Video Extensometer?

The core goal of material tensile testing is to accurately obtain the deformation and strain data of the specimen under load. In the past, laboratories often used contact extensometers, but in large-deformation, high/low-temperature, thin-sheet, soft-material and small-specimen testing, the traditional approach is easily affected by clamping method, specimen surface state and installation space.

Haytham video extensometerBased on single-camera DIC digital image correlation technology, it tracks specimen gauge length changes through image recognition and sub-pixel algorithms to achieve non-contact strain measurement. During testing, simply place markers or speckle patterns on the specimen surface; the device captures images in real time and automatically computes strain, displacement and deformation data.

Full-field strain measurement of hydrogel in tension

The advantages of this measurement approach are obvious. First, it does not touch the specimen and does not change the load state of the material itself, making it suitable for contact-sensitive samples such as soft materials, films, rubber, plastics and composites. Second, it accommodates a larger deformation range and continuously tracks the deformation process while the specimen stretches, necks or even approaches fracture. Third, it can be used in special environments such as high and low temperatures, avoiding the installation difficulties and insufficient stability of conventional extensometers at extreme temperatures.

Haytham video extensometer also supports data linkage with the testing machine, acquiring force values in real time and generating stress-strain curves. Users can manually set the gauge length according to test needs, with axial, transverse and multi-gauge measurement supported, meeting the testing needs of different materials, standards and development stages.

For material research, quality inspection, university laboratories and enterprise testing centers, the Haytham video extensometer is not only a strain measurement device, but also a vision measurement solution that improves testing efficiency, expands testing capability and reduces specimen interference.