Probador de Resistividad de Superficie de Hormigón SURF™ (B-515)




  • Used for rapid, easy and accurate measurement of the surface electrical resistivity of concrete based on the four-probe (Wenner-Array) technique. It automatically measures resistivity around the concrete specimen using four channels of 4-probe array (located at 90° from each other). The PC software generates the required reports according to the standard specifications.
  • It can determine the chloride permeability of concrete in accordance with AASHTO TP95. The measurement data can be used for durability-based quality control of concrete as well as the service life design of concrete structures.
  • The electrical resistivity of concrete is correlated well with important durability parameters such as permeability, diffusivity and in general the micro-structure characteristics of concrete.


  • Variable frequency (13 – 100 Hz)
  • Wide resistivity range (0.1 – 1,000 kΩ.cm)
  • Fast measurement (8 measurements < 15s)
  • Four-channel four-probe measurement
  • Limiting moisture loss
  • Automatic report generation with PC software
  • Fresh concrete testing/crack detection applications
  • Continuous measurement mode


Frequency  1 Hz ~ 4 Hz 5 Hz ~ 30 KHz
Sampling time  5 seconds  1 second
Reading time (minimum)  10 seconds  2 seconds
Single measurement time  1.5 seconds  1.5 seconds
Testing time (8 measurements)  <15 seconds  <15 seconds


Operating temperature 15 ~ 45 °C
Operating humidity 30 ~ 80%
Storage temperature 0 ~ 60°C
Operating voltage/current 100-250 V ± 10%, 60Hz
Dimensions 200 x 160 x 70 mm