Sales Products :: Electromagnetic
Numis Magnetic Resonance Sounding
The Magnetic Resonance Sounding methods (MRS)
The MRS is the only non-invasive method by which directly studies groundwater reservoirs from surface measurements. Other types of measurements, e.g. electrical resistivity and time or frequency domain EM can infer the presence of water by measuring the changes in the electrical properties of soils and rocks, but their results can be ambiguous and confused by the presence of electrically conductive materials such as clays and clayey shales which have electrical properties similar to those of fresh water.
In the MRS, a pulse of current at a given frequency is transmitted into a large surface loop. The signal produced in return by protons, contained within water molecules is measured within the same loop.
Three variants of the Numis exist:
- Numis Lite for depths to 50m
- Numis Plus for depths to 150m
- Numis Poly for depths to 150m, 4 channel receiver
DataSheets
Numis Lite Datasheet (PDF 443KB)
Numis Plus Datasheet (PDF 395KB)
Numis Poly Datasheet (PDF 209KB)
Electromagnetic Products
