Heavy Duty Steel Extensometer


3R’s steel extensometer is the most sturdy extensometer available on the market. It is equipped with a ball-guided mechanism completely independent from the measuring side. Its long stroke LVDT sensor allows measuring on long elongation samples. Nevertheless, the weight of the extensometer obliges its use on rigid samples (diameter over 6 mm).


HD Extensometer for round metal specimen


  • Diameter of speciment from 6 to 20 mm.
  • LVDT sensor, stroke 20 mm, accuracy 0.6 µm
  • Measuring base 70, 80 or 100 mm.
  • Anti-rotation.
  • Stroke limitation thanks to  a coated steel cable.
  • Ball-bearing guiding sleeve
  • Fixed to the testing frame with coated steel cable, to avoid damages due to fall after test
  • Hardened steel jaws.



Other measuring bases on request.