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E31.2 E32.2

Crack Measuring

Digital Postion Strain Gauge Deformation Meter

Digital Position Strain Gauge, Crack MeasurementThe Digital Position Strain Gauge Deformation Meter shown here consists of a digital dial gauge attached to a bar. A fixed conical point is mounted at one end of the bar, and a moving conical point is mounted on a knife edge pivot at the opposite end.

A setting out bar is used to position pre-drilled stainless steel discs which are attached to the structure using a suitable adhesive. Each time a reading has to be taken, the conical points of the gauge are inserted into the holes in the discs and the reading on the dial gauge noted. In this way, strain changes in the structure are converted into a change in the reading on the dial gauge.

The gauge has been designed so that only minor temperature corrections are required for changes in ambient temperature, and an Invar reference bar is provided for this purpose. Digital Gauges are available for every size except 50 mm, simply because the digital gauge wont fit on the smallest gauge.

Measuring Magnifier

Measuring MagnifierCrack widths are normally limited to 0.2 mm or 0.3 mm in concrete structures.  This inexpensive crack measuring device enables accurate determination of whether cracks exceed this limit.

  • Magnification 10x
  • Measuring range 20 mm x 0.1 mm
  • Field of View 32mm
  • Special design permitting to read on light and dark objects
  • Plastic case

This loupe also comes in a self-illuminating model. Powered by two c-cell batteries this model can be used in those poorly lit areas where the natural light is dim or non-existent. 

Crack Width Meter, Crack RulerCrack Width Meter

The crack width meter is used as a comparator to give an approximate crack size during visual surveys.

  • Made of durable plastic
  • Graduations from 0.1 mm to 2.5 mm

Crack Monitor

On some structures the rotation at cracks is also significant. This gauge is specifically designed to measure rotation, transverse and longitudinal movement. The crack monitor is:

  • Made of polycarbonateCrack Monitor, Perspex, 2d Scale
  • Used for measuring movements: horizontal ± 20 mm, ±10 mm.
  • Reading accuracy of: ± 0.5 mm on grid.

Crack Meter

Crack Meter, Vibrating WireThe Vibrating Wire Crack Meter are used to measure movement across surface cracks and joints in concrete, rock, soil and structures. They consist of a sensor outer body tube and an inner free sliding rod which is connected at the internal end to a vibrating wire sensor by a spring. 

More Information...

Field Microscope

Field MicroscopeThe field microscope is a small sized lightweight and conveniently portable microscope. Designed to cover the range between high grade heavily equipped microscopes and measuring magnifiers. With a magnification of 50 times this microscope can be used to accurately measure the width of cracks and also combines a calibrated focusing ring allow the depth of cracks to also be accurately measured.

  • Magnification 40x
  • Measuring Range 1.6 mm x 0.02 mm
  • Field of View 1.7 mm
  • Detachable light holder attachment also available

Additional Information

Crack Measuring Equipment Brochure

VIC:

Melbourne

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t (03) 9938 3830

m 0428 315 502

NSW:

Sydney

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t (02) 9986 1857

m 0418 381 709

QLD:

Brisbane

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t (07) 3040 6166

m 0419 477 715

WA:

Perth (Head Office)

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t (08) 9322 4020

m 0408 034 668

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