WGMD Multi-electrode Electrical Resistivity Tomography Instrument
Geophysical Resistivity IP Survey Equipment
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.
ERT equipment typically consists of electrodes placed on the ground surface or inserted into boreholes, which inject electrical current into the subsurface. The resulting potential differences are measured to determine the resistivity distribution of the materials underground. By interpreting these measurements, professionals can identify features such as groundwater tables, voids, bedrock, contaminants, and archaeological artifacts.
The advantages of using ERT include:
High Resolution Imaging: ERT provides detailed images of subsurface structures and properties, offering insights into geological formations and buried objects.
Non-Destructive and Non-Invasive: Unlike drilling or excavation, ERT does not disrupt the ground or structures, making it environmentally friendly and cost-effective.
Versatility: ERT can be applied in various terrains and environments, from urban settings to remote locations, providing valuable data for diverse applications.
Quantitative Analysis: It allows for quantitative interpretation of subsurface resistivity data, aiding in accurate characterization and modeling.
Time Efficiency: ERT surveys can cover large areas relatively quickly, enabling efficient data collection and rapid decision-making in field investigations.
Applications of WGMD Multi-electrode Electrical Resistivity Tomography Instrument Geophysical Resistivity IP Survey Equipment
1 By utilizing the apparent resistivity parameters, it is widely used in hydrology, environmental protection, engineering geophysical exploration, metal and non-metal mineral resources exploration.
2 Microcomputer controlled, direct-reading resistivity, various electrode arranging mode, data protection against power-failure
3 This instrument applies to Electrical Prospecting such as Vertical Electrical Sounding, Electrical Profiling, Charging Method and Spontaneous Potential Method, etc. On ground and in trench.
- Underground inspection
- city geophysical exploration
- railway and bridge inspecting
- engineering geology
- geothermal field survey.
Technical Specifications of WGMD Multi-electrode Electrical Resistivity Tomography Instrument Geophysical Resistivity IP Survey Equipment
| Transmitting |
| Maximum power |
9000W(VES),2400W(Imaging) |
| Maximum voltage |
1500V(VES),2400 peak-to-peak; 800V(Imaging), 1600 peak-to-peak |
| Maximum current |
6A(VES), 3A(Imaging) |
| Power supply pulse width |
1~60s, duty cycle is 1:1 |
| Receiving |
| Voltage |
± 80V (24 bit A/D) |
| Vp accuracy(before stacking) |
If Vp≥5mV, ±0.2% ±1LSB. If 0.1mV≤ Vp<5mV, ±1%±1LSB. |
| Current |
6A (24bit A/D) |
| Ip accuracy(before stacking) |
If Ip≥ 5mA, ± 0.2% ±1LSB;If 0.1mA≤ Ip<5mA, then ± 1% ±1LSB.. |
| Apparent Polarizability Accuracy |
±1% ±1LSB |
| Suppression |
≥80dB, for 50Hz or 60Hz (industrial frequency interference) either in common mode or differential mode interference |
| Input impedance |
>100MΩ |
| SP compensation range |
± 10V |
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