M.C. Miller offers durable, high-performance, competitively-priced analog and digital resistance meters, the Miller 400A and the Miller 400D, respectively.

These are 4-terminal resistance meters designed to meet the demands of the corrosion control industry. Both the analog and the digital meters satisfy the resistance meter requirements associated with the following Standards:

• ASTM G57-06 [4-Pin Wenner Method and 4-Electrode Soil Box Method]
• ASTM G187-05 [Two-Electrode Soil Box Method]
• AASHTO T288 [Two-Electrode Soil Box Method]

Whether you need to measure soil resistivity or the resistance-to-earth of an electrode, such as a ground rod or an anode, the M. C. Miller Resistance Meters have you covered ....

• Determine the average earth resistivity to a specific depth – 4-Electrode Application
• Determine the resistivity of a soil sample via a soil box – 4-Electrode or 2-Electrode Application
• Measure the resistance-to-earth of a buried electrode, such as a ground rod, or an anode, for example – 3-Electrode Application
• Measure the resistance between two buried electrodes, such as two ground rods, or two anodes – 2-Electrode Application

The Miller 400D offers a unique, error-free data-logging option for “over-the-pipe” soil resistivity surveys. When combined with M.C. Miller’s “ProCP Soil Resistivity” software program (included, free-of-charge, with the Miller 400D), eliminates possible errors associated with writing down resistance values and subsequently calculating soil resistivity values based on pin spacings. The ProCP Soil Resistivity software does all of the work accurately for you. See Miller 400D for more details.