When using the Wenner 4-pin method, what do you measure for your calculations?

When employing the Wenner 4-pin method for measuring soil resistivity, the key measurement taken for calculations is resistance. This method uses four pins, where two outer pins are used to pass a current through the soil, and the two inner pins measure the resulting voltage drop across a known distance. The relationship between the voltage drop and the current flowing through the soil allows for the calculation of resistance, following Ohm’s Law.

The measurement of resistance is crucial because it is indicative of how well electric current can flow through the soil, which is a fundamental aspect when assessing corrosion potential or the effectiveness of cathodic protection systems. Understanding soil resistivity can help in determining the necessary design parameters for cathodic protection systems in various applications. Thus, the correct measure you obtain using the Wenner 4-pin method for your calculations is resistance.