Giatec Surf is a laboratory test device for rapid, easy and accurate measurement of the surface electrical resistivity of concrete based on the four-probe (Wenner-Array) technique. The Surf patented technology automatically measures resistivity around the concrete specimen using four channels of 4-probe array (located at 90° from each other). The unique design of Surf minimizes the error due to water evaporation from the surface during the test. The PC software generates the required reports according to the standard specifications. Surf can be used to determine the chloride permeability of concrete in accordance with AASHTO T95 and the upcoming ASTM standard. The measurement data can be used for durability-based quality control of concrete as well as the service life design of concrete structures.

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