Longitudinal Extensometer Measuring Small Extensions MFA-25

Description

Characteristics

The MFA 25 linear strain gauge is suitable for many test pieces above an initial instrument measuring length of Lo of 25 mm (by 180°-turning of the measuring blades even above L0 = 20 mm). At a measuring path of 25 mm the MFA 25 finds multiple application for metal and plastic test pieces. Especially the low tension causes only a little force on the test pieces.

TECHNICAL DATA EXTENSOMETERS MFA 25 MFA 12 MFA 8
Accuracy class EN ISO 9513 0.5 0.5 0.2
Measurement principle —- Full Bridge Deformation Measurement ———-
Range in pulling direction 25 mm 12 mm 8 mm
Linearity error incl. hysteresis 0.25% 0.25% 0.1%
Indication error (rel.)* 0.5% 0.5% 0.2%
Indication Error* 1.5 μm 1.5 μm 0.6 μm
Repetition accuracy 0.1% 0.1% 0.1%
Initial instrument length error (all three) 50 μm
Sensitivity (all three) 2 mV/V
Nominal bridge resistance (all three) 350 Ω
Max. voltage input (all three) 14 V
Actuation force (all three) > 10 cN
Initial standard test length (all three) 25 & 50mm (20 mm)
Accessories for initial test lengths (all three) 30, 80 and 100 mm
OTHERS Initial test lengths on request on request on request
Standard temperature range (all three) +1 °C to + 60 °C
Type for temperature chamber (all three) +1 °C to + 200 (260) °C
Size with Lo 25 (H x W x L) (all three) 27 x 50 x 140 mm
Size with Lo 50 (H x W x L) (all three) 52 x 50 x 140 mm
Approximate net weight (all three) 95 g