These machines have been designed for performing, in the field or laboratory, tension tests on steel rebars up to 24 mm diameter and compression tests on cylindrical concrete specimens up to 160 mm diameter x 320 mm height and cubes up to 150 mm, using the appropriate accessories. They are comparatively lightweight, with small dimensions, good accuracy and a low cost, making them ideal for site and educational purposes.

Extensometers

• Most extensometers used for measuring the extension of specimens in traction, particularly in the case of steel and brittle materials, are only able to detect strain during the first stage of the test (while the brittle materials still have their elasticity) and have to be disconnected before failure.