📊 ASTM G57 Wenner 4-Pin Array (Resistivity Ohm-cm = 2 x π x a x R), Corrosivity

Soil Resistivity Wenner 4-Pin Calculator

Model field soil electrical resistivity testing under ASTM G57 & IEEE 81: calculate apparent soil resistivity (Ohm-cm = 191.5 x Pin Spacing ft x Resistance R Ohms across pin depths from 2.5 ft to 30 ft), classify soil corrosivity (<2,000 Ohm-cm severe corrosion vs >10,000 Ohm-cm mild), and corrosion survey profits.

1. Project & Operating Inputs

Soil Resistivity Test Locations Surveyed (Location Count e.g. 24 Locations)

Average Measured Soil Resistance (Ohms e.g. 4.8 Ohms at 10-ft Pin Spacing)

Customer Invoiced Bid Price per Survey Location ($ / Location)

4-Pin Soil Resistance Meter, GPS Soil Mapping & NACE Level II Tech ($ / Loc)

2. Financial Breakdown & Yield

ASTM G57 WENNER 4-PIN ARRAY

Turnkey Soil Survey Contract Profit

Corrosion Survey Service Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost