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Geophysical Resistivity Survey Equipment Electrical Resistivity Meters for Ground Water Exploration Geoelectrical Underground Water Detector1
Geographic Surveying InstrumentGeophysical EquipmentGeophysical Instrument
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
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Product Description Geophysical Resistivity Survey Equipment Electrical Resistivity Meters for ground water exploration Geoelectrical Underground Water Detector What is electrical resistivity?Electrical resistivity is a geophysical technique for imaging sub-surfaces structures from electrical measurements made at the surface, or by electrodes in one or more boreholes. It is closely related to the medical imaging technique electrical impedance tomography (EIT), and mathematically is the same inverse problemWhat is theory of geophysical resistivity meter?Surface electrical resistivity surveying is based on the principle that the distribution of electrical potential in the ground around a current-carrying electrode depends on the electrical resistivities and distribution of the surrounding soils and rocks. The usual practice in the field is to apply an electrical direct current (DC) between two electrodes implanted in the ground and to measure the difference of potential between two additional electrodes that do not carry current. Usually, the potential electrodes are in line between the current electrodes, but in principle, they can be located anywhere. The current used is either direct current, commutated direct currentMore types array can be chose for geophysical resistivity meterWenner ArraySchlumberger ArrayThe Gradient ArrayOther array spacingDifferent method of resistivity meterVertical Electric SoundingElectric profilingElectric ImagingLimitations of Resistivity surveyResistivity surveys can offer an alternative imaging technique that works well to identify subsurface material. However, as with other geophysical methods, there are some limitations. For example, with VES surveys there is a limit to how far the detectable depth is. This mostly relies on the maximum separation of current electrodes. Additionally, VES generally works with horizontal layers so if the area has steep topographic variation then the survey will be difficult. Geophysical Resistivity Survey Equipment Electrical Resistivity Meters for ground water exploration Geoelectrical Underground Water Detector
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