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Crack Measuring Device: Digital Position Strain Gauge Deformation Meter

The document describes several devices for measuring cracks in structures: - A digital position strain gauge deformation meter uses conical points and a dial gauge to measure strain changes and crack openings by taking readings from pre-drilled discs attached to the structure. - A crack magnifier enables determining if cracks exceed 0.2-0.3mm limits by magnifying cracks 10x with a field of view of 32mm. - A crack width meter uses durable plastic graduations from 0.1mm to 2.5mm as a visual comparator for approximate crack sizes. - A crack monitor specifically measures rotation, transverse, and longitudinal movement with polycarbonate construction and ±20mm horizontal and ±10mm

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Evello Mercano
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42 views2 pages

Crack Measuring Device: Digital Position Strain Gauge Deformation Meter

The document describes several devices for measuring cracks in structures: - A digital position strain gauge deformation meter uses conical points and a dial gauge to measure strain changes and crack openings by taking readings from pre-drilled discs attached to the structure. - A crack magnifier enables determining if cracks exceed 0.2-0.3mm limits by magnifying cracks 10x with a field of view of 32mm. - A crack width meter uses durable plastic graduations from 0.1mm to 2.5mm as a visual comparator for approximate crack sizes. - A crack monitor specifically measures rotation, transverse, and longitudinal movement with polycarbonate construction and ±20mm horizontal and ±10mm

Uploaded by

Evello Mercano
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Crack Measuring Device

Digital Position Strain Gauge Deformation Meter


The 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 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 a
reference bar is provided for this purpose.

 Measuring range : Compression - 1.6㎜ / Tension - 3.4㎜


 Minimum measuring unit :0.001㎜
 Standard accessories: Digital crack gauge, Calibration Bar,
Installation Bar, Locating Discs (box of 100)
Crack Magnifier
Crack 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


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 polycarbonate
 Used for measuring movements: horizontal ± 20 mm, ±10 mm.
 Reading accuracy of: ± 0.5 mm on grid.
Crack Meter

The 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
The 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 50x
 Measuring Range 1.6 mm x 0.02 mm
 Field of View 1.7 mm
 Comes with light

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