The extensometer MFI is suitable for testing deformation of samples with a large gauge length (Lo up to 1000 mm), for example wire cables, chains, construction steel rods, belts etc. The instrument is manufactured with three standard gauge lengths of 20, 40 and 100 mm. It can be operated in horizontal and vertical test machines. Despite its sturdy construction and the large Lo variation, it is easy to operate due to its low weight.

TECHNICAL DATA                                   MFI 20             MFI 40              MFI 100
Accuracy class EN ISO 9513                        1                        1
Measuring principle                                                  (the three) inductive
Tensile test measurement range    + 20 mm        + 40 mm            + 100 mm
Tolerance Initial thing                                50 μm                50 μm                 100 μm
Tolerance The initial thing                                   0.2%                 0.2%                   0.2%
Error Linearity including hysteresis                      (all three) 0.2 %
Indication error* (rel.)                                          (all three) 1%
Indication error* (abs.)                                      (all three) 3 μm
Error in initial distance (Lo)                                  (the three) 0.2%
Initial distance error (Lo) 0.4 mm 0.5 mm 0.5 mm
Activation force                                                  (all three) 100 cN
Initial test distance (Lo) 225 mm 250 mm 300 mm
Initial distance (Lo) with accessory 226 – 1000 mm 251 – 1000 mm 301 – 1000 mm
Operating temperature                          (all three) 0 – 70 °C 0 – 70 °C 0 – 70 °C
Net weight                                                   700 g                 800 g                    1000 g
Cross section round sample                 (the three) 3 to 35 mm

• Metal Wires
• Metal Chains
• Construction Steel Rods
• Straps
• Ropes

Accuracy class EN ISO 9513