LVDT Extensometers

These extensometers measure strain by means of knife edges which contact the sample, one of which is fixed in its position, and the other which is located on a moveable arm. This moveable arm is actually a pivoted arm, on one end is the knife edge and the other is attached to an armature that moves through an LVDT coil. Most of these extensometers can be adapted to your exact specimen holding needs by different options, but in their standard form hold flat or round specimens from 1/16” to 5/8” (1.6mm to 16mm).