Understanding the Search for a GD-32 Resistivity Imaging System
The Geomative GD-32 is a listed resistivity and induced polarization imaging system within the current GD product range. Buyers requesting a GD-32 quotation should receive a model-specific proposal covering acquisition hardware, accessories, software, and support.
The GD series contains instruments with different receiving capacities and transmitter specifications. Selecting a suitable configuration requires comparing these differences against the planned survey, rather than treating all GD models as interchangeable.
This guide explains the specifications, deployment requirements, and supporting evidence that buyers should examine.
Why Resistivity and IP Imaging Systems Matter
Resistivity and IP measurements can help investigate subsurface electrical contrasts relevant to mineral exploration, groundwater studies, engineering, and environmental work.
Their usefulness depends on the geological target, survey geometry, electrical contact, interference, and measurement quality. Equipment selection should therefore start with the investigation objective and expected physical-property contrasts.
Field quality checks help identify questionable observations while crews remain on site. Repeat measurements remain an important part of verifying consistency and should be included in the survey plan.
Geomative’s GD Series: Core Positioning
Geomative’s current GD-12/22/32 family provides different acquisition capacities within its resistivity and IP range. The GD-10 and GD-20 also appear in the product catalog.
The GD-10 is a single-channel instrument. GD-20 specifications depend on the version and configuration. These models should not be described as having identical capabilities to the GD-22 or GD-32.
For buyers, the practical comparison is how each proposed system will complete the required measurement sequence, support field checks, and deliver data for interpretation.
Technical Specifications Buyers Should Evaluate
The current GD-12/22/32 technical table lists:
| Model | Receiving channels | Maximum transmit power | Full-waveform acquisition |
|---|---|---|---|
| GD-12 | 1 | 7.2 kW | No |
| GD-22 | 6 | 15 kW | Yes |
| GD-32 | 12 | 15 kW | Yes |
For GD-32, published specifications also include maximum transmitter ratings of 1,500 V and 10 A, 24-bit A/D conversion, and power-line rejection of at least 120 dB.
The GD-20 documentation lists 9 kW as an optional configuration rather than a universal standard rating.
Maximum instrument specifications must be considered alongside the operating limits of the complete supplied system. Power sources, switching equipment, cables, and measurement modes can affect the usable configuration.
Power-line rejection describes a particular interference characteristic. It does not guarantee performance against every noise source, and transmitter power alone does not establish exploration depth.
Industry Adaptation and Field Applications
Resistivity and IP surveys can support mineral targeting where relevant electrical contrasts exist. They may also contribute to hydrogeological, engineering, environmental, and archaeological investigations.
Each application requires appropriate survey design and interpretation. A configuration suitable for a surface profile should not automatically be assumed suitable for a borehole, underwater survey, or long-term monitoring installation.
Likewise, an electrical anomaly does not independently confirm mineralization, an aquifer, a leakage pathway, a void, or contamination. Drilling, sampling, inspection, or other supporting evidence may be needed to establish its significance.
For monitoring projects, the proposal should define acquisition schedules, maintenance, data review, and procedures for investigating significant changes.
The Supporting Ecosystem: Accessories and Software
A complete quotation should identify the accessories required for the planned deployment. These may include electrodes, survey cables, switching devices, power supplies, and environment-specific components.
Compatibility should be confirmed for the exact instrument and operating mode. Cable heads and power boosters should not be treated as universal upgrades, and the operating limits of the complete configuration should be documented.
On the software side, Geomative Studio documentation lists survey scripting and data exports including TXT, Excel, DAT, and URF. Buyers should test the actual files in their intended downstream tools.
DIGspace provides an ERT workflow that includes data review and online inversion. Confirm the functions, formats, and software access included in the proposal, particularly where IP processing or multiple survey methods are required.
Spatial visualization of several datasets can assist interpretation, but should not automatically be described as joint inversion. Remote projects should also confirm connectivity requirements and available offline arrangements.
Documented Field Applications
Geomative’s Brazil gold exploration case identifies a GD-10 instrument used for resistivity and IP investigation. It provides a method reference for investigating potential mineralization targets, rather than direct evidence of GD-32 performance.
The Beishan lead-zinc mine case concerns GT-30 transient electromagnetic work. Geomative reports subsequent exposure verification in that project, but its results should remain attributed to the actual instrument, method, and field conditions.
Heritage and environmental references should be assessed with the same care. Buyers should distinguish measured responses, interpreted boundaries, and independently verified findings before using a case as evidence for a proposed configuration.
For procurement, the most relevant references identify the equipment, survey geometry, geological conditions, processing workflow, and available verification.
What to Look for When Requesting a Quote
A useful GD-32 quotation request should specify:
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The investigation objective, expected target depth, and approximate target dimensions.
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The proposed electrode layout and required resistivity and IP measurements.
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Terrain, access, contact conditions, and known interference sources.
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Required raw-data access, processing functions, and export formats.
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Training, maintenance, technical support, and spare-parts requirements.
Ask for an itemized configuration and a representative demonstration covering acquisition, quality checks, data transfer, and processing.
GD-32 should be evaluated directly as a current product. Alternative GD configurations can then be compared against the same project brief, allowing buyers to judge acquisition capacity, workflow suitability, and total project requirements on a consistent basis.
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Geomative Co., Ltd.
