Soil resistivity testing equipment utilizes the Wenner 4-pin method developed by the National Bureau of Standards. The test determines average resistivity of the soils to a depth equal to the spacing between electrodes (pins). Digital or Analog Soil Resistivity Meters are available separately. Selection of one is required for testing. A test kit with the other components needed for soil resistivity measurements is also available. Testing with the Wenner 4-pin method meets ASTM G57 and AASHTO T 288 standards.
Soil Resistivity Test Kit includes components required for determining resistivity of soil. The test kit is designed for the maximum pin spacing of 20ft (6.1m) recommended for a standard survey. The kit contains a soil resistivity reel, soil box with test lead wires, and soil pins. A sturdy plastic case conveniently stores and carries kit components.