Surfer is a compact hand-held instrument for measuring the speed of a pulse of ultrasonic longitudinal stress waves propagating within the near surface concrete; that is, it measures the ultrasonic pulse velocity (UPV). The instrument incorporates two dry-point-contact (DPC) transducers that are brought into contact with the surface of the test object.




  • Assessment of concrete uniformity
  • Estimation of the extent and severity of deterioration of nearsurface concrete
  • Evaluate flexural strength of stone panels using correlations
  • Evaluation of damage to test specimens during durability testing (freezing and thawing, sulfate attack, alkali-silica reaction)
  • Estimation of depth of surface-opening cracks
  • Estimation of early-age strength development (with project specific correlation)


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