Crack monitor - - Crack monitor

Cracks occur in most buildings and civil engineering structures. Monitoring the changes in crack width is an important diagnostic technique for determining the cause and specifying the remedial work.
Crack monitors are used to determine the extent of structural problems in concrete, brick, and masonry structures. The crack gauges monitor the movements across a crack over a period of time to determine what structural problems exist.

Crack monitor is a leading distributor of crack monitors in the Netherlands.


Crack monitors consist of two overlapping acrylic or rigid PVC plates. One plate is marked with a millimeter grid, the other with cross hairs centered over the grid. Once installed, any movement can be easily seen and recorded on a crack progress chart included with each crack monitor.


Crack monitor - Scheuren in de woning waar scheurmeters geplaatst kunnen vinden

A crack monitor can be used to determine whether existing cracks in the historic building are stable or still experiencing movement. Compared with measurements taken during the monitoring phase, such information can help determine if movement resulted from adjacent work


Through the installation of a crack monitor and monthly monitoring (6 to 12 month monitoring is recommended for best results), we can evaluated whether settlements causing the cracks are active or if they have stabilized. Many homes bearing on clay soil can also experience foundation movements from swelling of the of the clay soil during wet periods. A crack monitoring program can help to identify if your home is susceptible to seasonal variations in ground moisture.


Max. crack width movement 

Max. upward movement 

Coeff. of thermal expansion ,


Acrylic plastic: hot-stamped crosshairs and grid.

0.5mm (estimated value)

20mm 3/4" longitudinal

10mm 3/8" transverse

6.84x10-5mm/mm/C  3.80x10-5in/in/F




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