Economy Crack Comparator

Model: HM-639
Price: $4.00

HM-639 Economy Crack Comparator measures crack widths of concrete used in roads, pavements, bridges and other structures. This credit card-sized device is inexpensive, fits in a pocket, and can monitor cracks from 0.1 to 7.0mm (0.004 to 0.26in). Marked in inch and metric measurements. View our full line of Concrete Crack Monitors.


  • Good for field use
  • Measures in inch and metric

Included Items:

  • HM-369 Economy Crack Comparator
Estimated Shipping Weight 1.0lbs (0.45kg)

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Estimated Shipping Weight 1.0lbs (0.45kg)
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