A resistivity meter, also called an electrical resistance meter, measures electrical currents in the ground. Similar to an ohmmeter, this electronic device uses metal probes inserted into the ground to obtain a reading of electrical resistance. Most resistivity meters have four probes mounted on a strong, rigid frame. Some are designed to measure electrical currents without having contact with the soil.
Resistivity meters, ohmmeters, magnetometers, electromagnetic (EM) conductivity meters and ground-penetrating radar (GPR) are commonly used for geophysical surveys. Scientists and engineers use them to test soil, locate ground water and survey underground structures...Read More