Uniaxial Bolt Type

This unit is used for monitoring of cracks, joints and fissures. It consists of two stainless steel round datum blocks that are installed on either side of the opening. Each datum block has a groove on the surface along the circumference to assist in taking readings. A through mounting hole helps mounting the datum block on concrete, masonry or rock surface using expandable anchors.


M8 nuts are provided to tighten the expandable anchor. The distance between the grooves of the datum blocks is initially measured by a digital inside caliper with a resolution of 0.01 mm.

Range (mm) Depends on range of digital inside caliper
Resolution 0.01 mm (of digital inside caliper)
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Equipment Rental

GDS has a variety of instruments for hire, these Instruments, Readouts and Dataloggers are available for product hire on a short-term (fortnightly) or long-term (monthly) basis including, but not limited to, the following:

  • Load cells
  • Tilt meters
  • Manual Readout units
  • Dataloggers
  • Tiltmeters
  • Inclinometers