Geophysical Resistivity Meter Instrument Geological Mapping Equipment Terrameter for Groundwater Investigation
Product Description
Electrical Resistivity Tomography (ERT) imaging equipment is a geophysical technique used for subsurface imaging and exploration. It operates by measuring the electrical resistivity of the ground or structures to create images that depict variations in subsurface properties. This non-destructive method is widely utilized in geotechnical investigations, environmental studies, archaeology, and civil engineering.
In resistivity imaging, an array of electrodes is placed on the ground surface and a small current is injected into the ground through two electrodes. The resulting potential difference is measured between other pairs of electrodes. By analyzing the distribution of electrical potentials, it is possible to infer the resistivity distribution of the subsurface. High-resistivity materials, such as dry rocks or minerals, will produce high potentials, while low-resistivity materials, such as water-saturated soils, will produce low potentials.
Main Applications of Geophysical Resistivity Meter Instrument Geological Mapping Equipment Terrameter
By utilizing relevant parameters of apparent resistivity and induced polarization method, the instrument is widely used in many aspects including metal and non-metal resources exploration, energy exploration, city geophysical exploration, railway and bridge engineering exploration, etc.
Search for groundwater, solve the human and animal drinking water issue as well as industrial and agricultural water issue. Determine the hidden safety risk location in reservoir dam foundation and flood-control dyke, find faultage zone and collapse column, landslides, coal mining goaf, search for geothermal and other hydrological, engineering geological exploration.
Accessories made by our factory with 60-channel or 120-channel multiplex electrode switch, also can be used for multi-electrode resistivity survey system.
Technical Specifications of 2D Electrical Resistivity Tomography (ERT) Equipment with Multi-electrodes for Groundwater and Soil and Rock Layer Investigation
| Transmitting Unit |
| Maximum Transmitting Power |
9000W |
| Maximum Supply Voltage |
±1500V (3000Vp-p) |
| Maximum Supply Current |
±6A (12Ap-p) |
| Power Supply Pulse Width |
1~60s, duty cycle is 1:1 |
| Tablet PC |
|
| Operating System |
Windows 10 64-bit |
| Processor |
Intel Core M Processor |
| RAM |
4GB |
| Capacity |
128GB |
| Internal Power Source (WDA-1B) |
| Maximum Voltage |
200V (four notches: 50V, 100V, 150V, 200V) |
| Maximum Current |
0.7A |
| Others |
| Power Supply |
Internal large capacity lithium battery or 12V external power supply |
| Working Temperature |
-10°C ~ +50°C, 95% RH |
| Storage Temperature |
-20°C ~ +60°C |
| Weight |
≤4kg (WDA-1), ≤6kg (WDA-1B) |
| Dimension |
270mm x 246mm x 123mm (WDA-1), 340mm x 295mm x 152mm (WDA-1B) |
Use Cases of Electrical Resistivity Imaging (Tomography) Equipment
Groundwater Investigation:
ERI is commonly used in hydrology and environmental engineering to map the subsurface distribution of groundwater resources. By measuring resistivity variations, ERI can detect the presence of water-bearing layers, aquifers, and the direction of groundwater flow. This is crucial for water resource management and assessing groundwater contamination.
Example: An ERI survey was conducted in a rural area to assess the location and depth of an aquifer. The resistivity data helped identify regions where drilling could be focused to maximize water yield.
Contamination Detection and Environmental Remediation:
Electrical Resistivity Imaging is an effective tool for detecting contamination plumes in the subsurface, such as petroleum products, heavy metals, or chlorinated solvents. The resistivity contrast between contaminated and non-contaminated areas helps pinpoint the extent of the contamination, which is critical for designing remediation strategies.
Example: An ERI survey was used at an industrial site to locate areas where hazardous chemicals had leaked into the soil. The data revealed the boundaries of the contaminated zones, aiding in the planning of soil remediation efforts.
2D Geophysical Resistivity IP (Induced Polarization) Imaging Survey Equipment Groundwater Metal Mining Results:
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