Soil Resistivity Test Apparatus

Soil resistivity testing equipment utilizes the Wenner 4-pin method developed by the National Bureau of Standards. The test determines the average resistivity of the soils to a depth equal to the spacing between electrodes (pins). Digital or Analog Soil Resistivity Meters are available separately.

The Wenner 4-point soil resistivity test uses 4 probes spaced at equal distances across the surface of the earth in a straight line. The distance that the probes are spaced determines the testing depth into the soil. Multiple tests are typically conducted at a variety of probe spacing.