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Soil Resistivity


Soil resistivity is a measure of how much the soil resists the flow of electricity. It is a critical factor in design of systems which rely on current passing through the Earth’s surface. Soil Resistivity testing measures the resistance of soil. Soil resistivity testing generally requires a combination of the following components:

  • Soil resistivity test instrument
  • Metal pins
  • Wiring
  • Probe with two isolated electrodes
  • AC or DC current source
  • Ammeter and volt meter
  • Soil box

Equipment necessary to perform a soil resistivity testing depends on the soil resistivity method selected for the survey. Typical methods of measuring soil resistivity are as follows:

  • Wenner 4-Pin
  • Single Probe
  • Soil Box


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