Products Description
Groundwater exploration often involves complex geological conditions where similar resistivity values can occur in different formations. For this reason, relying on a single resistivity parameter may not always provide enough information for interpretation.
This WDJD-4A resistivity IP meter combines resistivity measurement with induced polarization analysis and provides additional parameters such as half-decay time, excitation ratio and attenuation degree. These measurements give geologists additional evidence when analyzing possible aquifer zones and distinguishing them from surrounding formations.
Multiple electrode array configurations are available for different survey requirements. Automatic compensation functions reduce the need for manual correction caused by spontaneous potential, electrode drift and polarization effects, helping field crews obtain more consistent survey data.
The complete groundwater exploration system can be configured with the main instrument, survey cables, electrodes, power accessories and data-processing software for a complete field-to-office workflow.
Key Technical Specifications
1. Receiver Section
□ Voltage channel: ±50V, ±0.2% ±1 LSB, 24-bit A/D
□ Maximum voltage sampling resolution: 0.01μV
□ Input impedance: ≥100MΩ
□ Apparent polarizability measurement accuracy: ±1% ±1 LSB
□ SP compensation range: ±10V
□ Current channel: 6A, ±0.2% ±1 LSB, 24-bit A/D
□ Maximum current sampling resolution: 0.02μA
□ 50Hz power frequency interference suppression: >80dB
2. Transmitter Section
□ Maximum transmission power: 7200W
□ Maximum output voltage: ±1200V (i.e., 2400Vp-p)
□ Maximum output current: ±6A (i.e., 12Ap-p)
□ Output waveform: Pulse width 1–60 seconds, 1:1 duty cycle, bipolar
3. Others
□ Display: LCD
□ Storage capacity: ≥1GB
□ Power supply: Built-in 12V/9Ah lithium battery (or external 12V power supply); continuous operation for over 30 hours
□ Main unit interfaces: A, B, M, N; DC high voltage; external battery/charging; 2 interfaces for distributed high-density cables; RS-232 and USB, etc.
□ Dimensions: 270mm × 246mm × 175mm
□ Weight: ≤4.4kg
□ Operating temperature: -10°C to +50°C, 95% RH
□ Storage temperature: -20°C to +60°C
System Components:
|
System Functions |
Main Unit |
Multi-channel Electrode Switch |
DC High-Voltage Power Supply |
Cables & Electrodes |
|
Centralized 2D High-Density Resistivity Survey |
W WDJD-4A |
WDZJ-60 |
External |
Electrodes |
|
Distributed 2D High-Density Resistivity & IP Survey |
WDJD
WDJD-4A |
N/A |
External |
Copper electrodes |
Centralized High-Density Cable
PDGF-10 resistivity cable
PDGF-10 IP cableThe WDJD-4A instrument measures electrical responses from subsurface formations through an electrode array. Differences in resistivity and induced polarization responses can indicate changes in geological structures and moisture conditions.
For a typical groundwater survey, the workflow includes:
Field Survey → Resistivity & IP Measurement → Data Storage → Data Processing → Subsurface Imaging → Aquifer Interpretation → Water Well Site Selection
The instrument itself does not automatically determine whether a specific point will produce water. Instead, it provides geophysical data and imaging results that can be interpreted together with geological and hydrogeological information to select more promising drilling locations.
System Configuration
Different configurations are available according to the survey depth, terrain and groundwater exploration requirements.
Basic Configuration
Includes the main resistivity IP meter for customers who already have compatible electrodes, cables and other field accessories.
Standard Groundwater Exploration Kit
Includes the main instrument, communication cable, lithium battery charger, non-polarizable electrodes, iron electrodes, survey cables, cable reels and data-processing software.
This configuration is suitable for most groundwater exploration and water well site selection projects.
Deep Exploration Configuration
For surveys requiring stronger transmission capability, the system can be configured with a WDZ-5B rectifier power supply. This configuration is suitable for deeper surveys and high-resistivity geological environments, including hard-rock mountain areas.
FAQ
Q: Can this WDJD-4A Resistivity IP Meter directly find underground water?
A: The instrument does not directly measure groundwater as a simple "water/no-water" detector. It collects resistivity and IP data that can reveal subsurface anomalies associated with geological formations and potential groundwater zones. Professional interpretation is required before drilling.
Q: Can it be used for water well site selection?
A: Yes. Water-well site selection is one of the main applications. Survey data can help identify potentially favorable areas before drilling and reduce dependence on blind drilling.
Q: Can it work in mountainous areas?
A: Yes. The instrument can be used in mountainous and hard-rock environments. For high-resistivity formations or deeper exploration requirements, a configuration with an external rectifier power supply can be selected.
Q: Is it suitable for dry soil?
A: Yes. Grounding resistance monitoring and compensation functions help operators manage measurement challenges caused by dry or high-resistance ground.
Q: Does the system include electrodes and cables?
A: A complete groundwater exploration kit can include non-polarizable electrodes, iron electrodes, survey cables, cable reels, communication accessories and processing software. The exact configuration can be selected according to the project requirements.
Q: Do new operators need professional training?
A: We provide operation manuals and video tutorials. Our technical team can also provide remote guidance covering instrument operation, electrode arrangement, data collection and basic data-processing procedures.
Q: Can the equipment determine the exact drilling depth?
A: No. The instrument provides geophysical survey data and subsurface imaging rather than a guaranteed drilling depth. The recommended drilling position and depth should be determined through professional geological interpretation and verified by drilling.
Get a Quote for Your Groundwater Exploration Project
Planning a groundwater survey or water-well site investigation?
Send us your survey depth, terrain, target application and project scale. We will recommend a suitable Resistivity IP Meter for Groundwater Exploration and provide the corresponding configuration and quotation.
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