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Soil Resistivity Test Kit

Soil Resistivity Test Kit


  • 4-pin resistivity test reel with leads
  • Four (4) heavy duty stainless steel T-handle pins 3/8″ x 18″
  • Miller soil box with four (4) soil pins
  • Custom carrying case


The Soil Resistivity Kit is designed to conveniently store and carry all the equipment required to calculate the resistivity of soil. The equipment provided is all that is necessary to perform the Wenner Four-Pin and Soil Method, as outlined by the
ASTM G 57-78 Standard.

 The M. C. Miller Co., Inc. 4-Pin Test Reel (Cat No. 44700, shown at the right) has been designed and engineered to be used in conjunction with any one of the MCM’s multi-combination family of meters, the Nilsson 400 soil resistance meter or similar four-terminal soil test instruments.

The test setup utilizes the mechanics of the “Four Electrode Method,” which was developed by the National Bureau of Standards and is commonly known as the Wenner 4-pin Method. The resultant resistivity is the average resistivity of the soil (electrolyte) to a depth equal to the spacing between adjacent electrodes (soil pins). The maximum depth (pin spacing) of this standard test set has been designed for 20 feet, which is recommended for standard survey.

The Soil Resistivity Reel is made up of four (4) separate, color-coded lead wires of: 5-foot (yellow), 25-foot (orange), 45-foot (red) and 65-foot (black) lengths. Lead wires are harnessed together and mounted on a lightweight handheld reel. Wire ends at the reel are affixed to female banana plug jacks (mounted in the center hub area) while the opposite ends are terminated with Mueller 27-C clips. Two-foot, color-coded, jumper leads with banana plug ends are supplied with soil resistivity reel to facilitate connection between the REEL and your test meter.

All lead wires and jumpers are made of our own No. 16 AWG, 105 strand copper wire with PVC insulation. In addition to our color coding of the wires, all ends are clearly labeled as to their connection point.

 Plexiglas Soil Box and Nilsson meter configuration

Soil Box inside area dimensions are approximately 1.5″ wide x 8.75″ long x 1.5″ deep (3.937cm wide x 22.23cm long x 3.190cm deep). The Soil Box corners are rounded for easy cleaning, current plates are made of stainless steel, potential pins are made of brass and are easily removed.

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