[ravin.deo]

hello everyone. I have just started on this forum and have a question from an experimental point of view. I have a cylindrical slab of soil sample (diameter = 30mm, thickness = 20mm). The sample lies on metallic platform. I wish to determine the resistivity of this soil slab using Wenner 4 point method employing sewing needles. I have been going through the edge effects and thickness effects for such measurement, and was wondering if I could get a suggestion from my fellow geophysicists here. Example, what should be the probe spacing be and constraint on centering along the center for an accurate measurement. Would be grateful for a discussion here.

Cheers,
Vin.

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