Extensometers

Model LESC and HESC Non-Contact Video Extensometers

The new Tinius Olsen sophisticated video extensometer is designed for the precise, non-contact measurement of specimen strain. The single camera Video Extensometer uses a high resolution monochrome camera, advanced high speed image processing, and cool lighting such that the point to point real-time video technology for continuous strain measurement through tensile break or compressive rupture. Key features include a high resolution of better than 1/100,000 of lens FOV, a high system accuracy of 0.5%, inclusive compact cool specimen lighting, automatic gauge search and find, and the ability to use both longitudinal and transverse multiple gauge lengths.

Preparation of the test specimen is quick and easy. Any visible marking can be used for pattern recognition, and these can be natural patterning on the specimen surface, pen marks, blob markers, punched gauge marks or a sprayed speckle pattern. The pattern recognition algorithms work on edge detection, so the more detailed the pattern, the more accurate the pattern recognition.