The Frequency Domain Electromagnetic (FDEM) method is a noninvasive geophysical technique for analyzing the electrical and magnetic properties of the subsurface through electromagnetic induction.
The system consists of two coils: a transmitter (Tx), which generates an alternating electromagnetic field of known frequency, and a receiver (Rx), which measures the ground response. When the primary field passes through the ground, it induces electric currents in the conductive materials. These currents, in turn, generate a secondary field, the intensity of which depends on the electrical conductivity of the medium.
The method allows two components to be measured:
- The quadrature component, used to calculate the apparent electrical conductivity;
- The in-phase component, which is sensitive to magnetic susceptibility and the presence of metallic materials.
FDEM is a rapid technique suitable for detailed mapping of large portions of land.
Fields of Application:
Archaeological research
Contaminant mapping
Hydrogeological research
Metal object search
Fields of Application:
Archaeological research
Contaminant mapping
Hydrogeological research
Metal object search
Discover the other electromagnetic methods
We are able to offer our partners multiple solutions in the field of Electromagnetic Investigations. Discover how we can meet your needs.