The CONVEX EALEY tape extensometer is comprised of a head, a measuring tape, and two references points.
The extensometer head
Houses an electronic tensioning device ensuring constant and repetitive tension of the tape, and a digital
gauge. A fitting with a pin to attach the tape is located at the front end of the head. Changes in distance between the two anchor points are read by means of the steel tape and the digital gauge.
The stainless steel perforated measuring tape is held inside the extensometer head and is mounted on a reel
attached to one end of the extensometer head.
The reference points
The standard reference point consists of a stainless steel eyebolt attached to an anchor. The anchors, chosen to suit the application, are either groutable steel rebar for installation in shallow drill holes, or expanding rock
bolts. The eyebolts can also be directly bolted or welded to structural steel beams.
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