Knowledge base

Electrical Resistivity Tomography (ERT) is a geophysical exploration technique that involves placing electrodes on the ground surface or in boreholes to inject electrical current into the subsurface and measuring the resulting voltage differences. This method allows for the imaging of…

I. What Are Electrical Instruments? Electrical instruments are devices that measure the electrical properties of subsurface media (e.g., resistivity, polarizability) for geological exploration. Key methods include: Technical Features: II. Comparison with Other Geophysical Methods 1. ​ERT vs. Ground Penetrating Radar…

I. What is an Electromagnetic Sounding Instrument? An electromagnetic sounding instrument is a geophysical device that reconstructs subsurface geological structures by measuring electromagnetic responses (resistivity, polarizability, etc.) of underground media. Its core principles include: Key Advantages: II. Comparison with Other…

Introduction An electrical resistivity meter is a sophisticated geophysical instrument used to measure the electrical resistivity of subsurface materials. This measurement is crucial in various fields such as geology, hydrogeology, environmental science, and engineering, where understanding the subsurface structure is…

I. What is an Electrical Resistivity Tomography (ERT) Instrument? An Electrical Resistivity Tomography (ERT) instrument is a geophysical device that reconstructs subsurface geological structures by measuring resistivity variations in underground media. By injecting direct or low-frequency current into the ground…