GD-12/22/32 1/6/12-Channel Resistivity IP Imaging System

The GD-12/22/32 is an all-new DC high-density electrical workstation integrating Electrical Resistivity Tomography (ERT), Induced Polarization (IP) and Spontaneous Potential (SP). It supports 1D sounding, 2D/3D high-density surveys, on-water/underwater continuous measurement, borehole and cross-hole detection, with built-in GPS/BeiDou timing sync and DIGspace cloud data management.

Product Overview

Functions:

The GD-12/22/32 is a new starting point of the GD series; its enclosure retains the most classic design. The unit has been comprehensively upgraded internally (hardware and software), enabling the all-new GD-series device to handle various high-density scenarios with ease, and together with the newly released DIGspace data-management platform, makes field surveys and office processing calm and effortless. For deep large-depth sounding, it supports a maximum 15 kW high power at 1500V/10A. For long-term safety monitoring, it supports connecting more than 1000 electrodes. For mid-deep IP prospecting for water and minerals, it supports ±2.5 V / ±80 V dual-range reception and 100% full-waveform acquisition, leaving even weak signals nowhere to hide. For large-area reconnaissance, it supports configuring multiple independent receivers, each with 12 separate receiving channels, multiplying field efficiency.

Application Scenarios:

1) Resource exploration: groundwater exploration, geothermal exploration, energy-resource exploration, metallic and non-metallic mineral exploration.
2) Engineering geological survey: urban engineering detection, cave detection, slope-hazard detection, pile-foundation and ground-base detection.
3) Environmental monitoring: subsurface contaminant-change detection, seawater-intrusion detection, dam seepage detection, underground-tank leakage detection, landfill leakage detection.
4) Others: geological mapping, archaeological research, water-surface and underwater resistivity detection, borehole-surface detection, cross-hole detection, combined land-water detection.

Product Catalog

Ordering Information

GD-12

GD-22

GD-32

In-depth Look

2D/3D Rolling

2D rolling: a limited cable covers a longer section with no repeated measuring points, improving field efficiency. 3D rolling: small areas are combined into a large area with automatic coordinate conversion, yielding more complete sections.

Electrode-count Expansion

>1000 channels: add relay power supplies as appropriate for the scenario to expand to a larger number of electrodes.

Faster Acquisition Speed

Equipped with the newly developed GS receiver; each receiver acquires 12 data sets simultaneously, and multiple units can be stacked. Data is sliced and synced to the cloud by GPS time segment, so the whole profile is collected efficiently once transmitter switching is done.

Flexible Channel Configuration

Acquisition channels support custom configuration; a single or multiple channels can be assigned for independent measurement. If a channel fails, it can be masked individually without affecting normal operation — strong fault tolerance.

Wide-range Voltage Acquisition

Multiple voltage-measurement ranges can be freely switched. The low-voltage range precisely captures weak signals and improves SNR, while the high-voltage range suits high-amplitude signals — balancing accuracy and applicability, with ±2.5V and ±80V available.

High-quality Signal Processing

Equipped with ±10V hardware SP compensation to effectively avoid spontaneous-potential interference and prevent weak valid signals from being masked; features hardware auto-gain with a 1/8~128 range, adapting to inputs of different strengths.

Multi-mode Sampling & Power-line Adaptation

Offers selectable sampling rates of 1kHz, 250Hz, 100Hz and 50Hz; high rates enable refined data acquisition. Supports one-tap 50Hz/60Hz power-line mode switching via the APP to suit different regional grids.

Overall Advantages

Supports real-time monitoring of time-series acquisition and online inversion with automatic mapping. The unit reaches IP66 protection with over-current, over-voltage, short-circuit, high-temperature and lightning protection for harsh field use; supports WiFi and Ethernet dual-mode data transfer with a mobile APP for easy operation.

Powered by DIGspace

Raw-data processing capabilities: Waveform viewing; recalculation with automatic bad-point removal 2D-to-1D conversion Array merging Online inversion

Platform capabilities: Project and data management Real-time 3D display Online inversion

Application Cases

Mineral Resource Exploration

Engineering Geological Investigation

Hydrogeological Survey

Underground Environmental Monitoring

online monitoring

Cross‑hole investigation

Key Selling Points

Up to 12 channels acquire in parallel and independent receivers can be added, multiplying field productivity and shortening project schedules.

≥120 dB power-line rejection, ≥100 MΩ input impedance and ±10 V hardware SP compensation keep noise down at the source.

100% full-waveform acquisition with ±2.5 V and ±80 V dual ranges keeps both strong near-field and weak far-field signals, making inversion more reliable.

Combined with DIGspace real-time upload, noise removal and automatic inversion images and reports, field work becomes office work.

15 kW / 1500 V / 10 A with roll-along measurement gives clearer deep anomalies and lets long profiles advance continuously after a single layout.

ERT/IP/sounding/marine/online monitoring handled by one system, plus 24/7 online alerts — less equipment, lower budget.

Technical Specifications

Parameter	GD-12	GD-22	GD-32
Max Transmit Voltage	1200V	1500V	1500V
Transmit Voltage Sampling Resolution	0.2V	0.2V	0.2V
Max Transmit Power	7.2KW	15KW	15KW
Max Transmit Current	6A	10A	10A
Current Measurement Accuracy	0.001	0.001	0.001
Current Max Sampling Resolution	10nA	10nA	10nA
Pulse Waveform	Standard square wave	Standard square wave	Standard square wave
Pulse Width	0.5s, 1s, 2s, 4s, 8s, 16s, 32s, 64s	0.25s, 0.5s, 1s, 2s, 4s, 8s, 16s, 32s, 64s, 128s, 256s	0.25s, 0.5s, 1s, 2s, 4s, 8s, 16s, 32s, 64s, 128s, 256s
Receive Channels	1 channel	6 channels	12 channels
Max Supported Electrodes	>1000	>1000	>1000
Voltage Measurement Range	±2.5V	±2.5V, ±80V	±2.5V, ±80V, ±600V (custom-made)
Voltage Measurement Accuracy	0.2%+0.3μV (±2.5V)	0.2%+0.3μV (±2.5V) 0.2%+9.5μV (±80V)	0.2%+0.3μV (±2.5V) 0.2%+9.5μV (±80V) 0.2%+70μV (±600V)
Voltage Max Sampling Resolution	2nV	2nV	2nV
SP Compensation Range	±10V	±10V	±10V
Dynamic Range	140dB	140dB	140dB
Filtering Characteristics	10Hz attenuation -0.6dB; 50/60Hz attenuation -110dB; 256Hz attenuation -120dB; 512Hz attenuation -160dB	10Hz attenuation -0.6dB; 50/60Hz attenuation -110dB; 256Hz attenuation -120dB; 512Hz attenuation -160dB	10Hz attenuation -0.6dB; 50/60Hz attenuation -110dB; 256Hz attenuation -120dB; 512Hz attenuation -160dB
Gain Range	1/8~128, auto gain	1/8~128, auto gain	1/8~128, auto gain
Linearity	0.00001	0.00001	0.00001
Power-line Rejection	50Hz/60Hz software selectable, ≥120dB	50Hz/60Hz software selectable, ≥120dB	50Hz/60Hz software selectable, ≥120dB
Sampling Rate	50Hz, 100Hz, 250Hz selectable	50Hz, 100Hz, 250Hz, 1kHz selectable	50Hz, 100Hz, 250Hz, 1kHz, 33kHz selectable
Input Impedance	≥100MΩ	≥100MΩ	≥100MΩ
A/D Conversion Bits	24bit	24bit	24bit
IP Measurement Waveform	Supports 50% duty cycle IP measurement	Supports 100% and 50% duty cycle IP measurement	Supports 100% and 50% duty cycle IP measurement
IP Windows	Decay-curve sampling reaches up to 20 time windows	Decay-curve sampling reaches up to 20 time windows	Decay-curve sampling reaches up to 20 time windows
Iterations	1-255	1-255	1-255
Full-waveform Acquisition	No	Yes	Yes

Accessories

Cable heads, centralized switching boxes and single/multi-channel distributed switching boxes are the connection units between high-density cables and the main unit, used for electrode-signal acquisition and switching. PC+ABS housings are rugged and durable; American Amphenol waterproof connectors are convenient and reliable; maintenance-free design, no charging required.

Distributed cable head

CS-60

Single-channel distributed switching box

Multi-channel distributed switching box

Ordering Information

Material Code	Model	Name	Material	Weight	Application Scenario	Acquisition Channels
M1.0001	SR-10	Bidirectional single-channel cable head	PC+ABS housing	0.4kg	Distributed layout	Single channel
M1.0002	SR-20	Bidirectional multi-channel cable head	PC+ABS housing	0.4kg	Distributed layout	5 channels
M1.0006	SR-60	Single-channel distributed switching box	Aluminum alloy housing	5kg	Land-water combined & borehole-surface combined	Single channel
M1.0004	SR-60 plus	Multi-channel distributed switching box	Aluminum alloy housing	5kg	Land-water combined & borehole-surface combined	5 channels
M1.0003	CS-60	Centralized switching box	Aluminum alloy housing	5kg	Surface, cross-hole, research lab	Single channel

High-density cables are core accessories for high-density electrical surveys. Multiple taps connect to electrodes and transmit subsurface electric-field signals to the cable head for acquisition and switching. Copper-core + TPU jacket is flexible and tensile-resistant, suited to complex field deployment; max transmit voltage 800V, max transmit current 2A, compatible with the entire 1st-to-3rd-generation resistivity product line. The cable family is divided into centralized and distributed by structure; centralized is further split by scenario into land, water-surface and underwater/borehole; each sub-class is split into single-tap and dual-tap by tap type.

Land high-density cables are standard signal-transmission lines for land electrical surveys, connecting to electrodes via taps with all tap signals transmitted centrally through a single cable to the main unit. Copper-core + TPU jacket is flexible and tensile-resistant, max transmit voltage 800V, max current 2.5A; tap spacing covers 0.5m~20m with 5/10/15/30 taps supported, split into single-tap and dual-tap by type, suited to land electrical section and area surveys. Single-tap cables use a single-tap structure where each tap connects to an electrode via an independent channel — simple and easy to maintain, the mainstream high-density configuration.

- Spec: 5~30 taps, 0.5~15m spacing, max 800V/2.5A

- Protection rating: IP66

Ordering Information

Material Code	Model	Name	Material	Specification	Length	Max Transmit Voltage	Max Transmit Current	Number of Taps	Application Scenario	Default Spacing
M1.2004	CB10-2	Single 10-tap cable, 2m spacing	Copper core + TPU jacket	Single-tap	21m	800V	2.5A	10	Land survey	2.1m
M1.2006	CB10-5	Single 10-tap cable, 5m spacing	Copper core + TPU jacket	Single-tap	51m	800V	2.5A	10	Land survey	5.1m
M1.2007	CB10-10	Single 10-tap cable, 10m spacing	Copper core + TPU jacket	Single-tap	102m	800V	2.5A	10	Land survey	10.2m
M1.2008	CB10-15	Single 10-tap cable, 15m spacing	Copper core + TPU jacket	Single-tap	152m	800V	2.5A	10	Land survey	15.2m
X	CB10-X (custom)	Custom	Copper core + TPU jacket	Single-tap	X	800V	2.5A	10	Land survey	X
M1.2001	CE5-5	Dual 5-tap cable, 5m spacing	Copper core + TPU jacket	Dual-tap	25.5m	800V	2.5A	5	Land survey	5.1m
M1.2002	CE5-10	Dual 5-tap cable, 10m spacing	Copper core + TPU jacket	Dual-tap	51m	800V	2.5A	5	Land survey	10.2m
X	CE5-X	Custom	Copper core + TPU jacket	Dual-tap	X	800V	2.5A	5	Land survey	X
M1.2010	CB15-5	Single 15-tap cable, 5m spacing	Copper core + TPU jacket	Single-tap	76.5m	800V	2.5A	15	Land survey	5.1m
M1.2011	CB15-10	Single 15-tap cable, 10m spacing	Copper core + TPU jacket	Single-tap	153m	800V	2.5A	15	Land survey	10.2m
M1.2014	CB30-5	Single 30-tap cable, 5m spacing	Copper core + TPU jacket	Single-tap	151m	800V	2.5A	30	Land survey	5.1m
X	X	Custom	Copper core + TPU jacket	Single-tap	X	800V	2.5A	X	Land survey	X

Water-surface and borehole high-density cables are dedicated signal-transmission lines for borehole and water-surface surveys. The single-tap structure with tensile and waterproof design offers max transmit voltage 800V, max current 2.5A; 30/60 taps in several specs, 5m or custom spacing, 500kg tensile strength suited to deep borehole detection. Single-tap cables use a single-tap structure where each tap connects to an electrode via an independent channel — simple, easy to maintain, the mainstream high-density configuration.

- Spec: 30/60 taps, 5m or custom spacing, 500kg tensile, max 800V/2.5A

- Protection rating: IP68

Ordering Information

Material Code	Model	Name	Material	Length	Max Transmit Voltage	Max Transmit Current	Number of Taps	Application Scenario	Tensile-resistant	Default Spacing	Tap Material
M1.2016	CF30-5	Single 30-tap freshwater cable, 5m spacing	Copper core + TPU jacket	160m	800V	2.5A	30	Freshwater survey	120kg	5m	Beryllium bronze, nickel-plated
M1.2017	CF30-5B	Single 30-tap freshwater, 5m spacing	Copper core + TPU jacket	320m	800V	2.5A	30	Freshwater survey	120kg	5m	Beryllium bronze, nickel-plated
M1.2018	CF60-5	Single 60-tap freshwater, 5m spacing	Copper core + TPU jacket	320m	800V	2.5A	60	Freshwater survey	120kg	5m	Beryllium bronze, nickel-plated
M1.2019	CD30-5	Single 30-tap borehole cable, 5m spacing	Copper core + TPU jacket	160m	800V	2.5A	30	Borehole survey	120kg	5m	Beryllium bronze, nickel-plated
M1.2020	CD30-5B	Single 30-tap borehole cable, 5m spacing	Copper core + TPU jacket	320m	800V	2.5A	30	Borehole survey	120kg	5m	Beryllium bronze, nickel-plated
M1.2021	CD60-5	Single 60-tap borehole cable, 5m spacing	Copper core + TPU jacket	320m	800V	2.5A	60	Borehole survey	120kg	5m	Beryllium bronze, nickel-plated
M1.2022	CM30-5	Single 30-tap marine cable, 5m spacing	Copper core + TPU jacket	160m	800V	2.5A	30	Marine survey	500kg	5m	Titanium/tantalum
M1.2023	CM30-5B	Single 30-tap marine cable, 5m spacing	Copper core + TPU jacket	320m	800V	2.5A	30	Marine survey	500kg	5m	Titanium/tantalum
M1.2024	CM60-5	Single 60-tap marine cable, 5m spacing	Copper core + TPU jacket	320m	800V	2.5A	60	Marine survey	500kg	5m	Titanium/tantalum
X	Custom	Custom	Copper core + TPU jacket	X	800V	2.5A	X	Custom scenario	X	X	Custom option

The HDPE 1D cable is a dedicated signal line for long-term online electrical monitoring. Its HDPE (high-density polyethylene) jacket is weather-resistant and anti-aging, suited to long-term fixed field deployment. Copper core + TPU jacket, max transmit voltage 1500V, max current 16A; length 250m/500m/1000m selectable, suited to long-term online monitoring and time-lapse surveys.

- Spec: 250m/500m/1000m, max 1500V/16A

- Protection rating: IP66

Ordering Information

Material Code	Model	Name	Specification	Applicable	Length	Max Transmit Voltage	Max Transmit Current	Application Scenario
M1.3010	HDPE-1000	HDPE-1000 1D cable	0.15*51, diameter 2.2mm	1st/2nd-generation resistivity systems	1000m	1500V	16A	1D
M1.3011	HDPE-500	HDPE-500 1D cable	0.15*51, diameter 2.2mm	1st/2nd-generation resistivity systems	500m	1500V	16A	1D
M1.3012	HDPE-250	HDPE-250 1D cable	0.15*51, diameter 2.2mm	1st/2nd-generation resistivity systems	250m	1500V	16A	1D

Straight-through cables are connection lines for direct device-to-device signal links in high-density systems, with no tap structure, offered in 14/19/30-core specs compatible with 1st-to-3rd-generation equipment. Copper core + TPU jacket, standard 2m up to 700m long-distance transmission, clear structure and easy wiring.

- Spec: 14/19/30 cores, 2m~700m

- Protection rating: IP66

Ordering Information

Material Code	Model	Name	Applicable	Length	Application Scenario
M1.3001	ZTX-14	14-core straight-through cable	Device or cable-head connection	Customizable	Land-water combined & special scenarios
M1.3002	ZTX-19	19-core straight-through cable	Device or cable-head connection	Customizable	Land-water combined & special scenarios
M1.3003	ZTX-30	30-core straight-through cable	Device or cable-head connection	Customizable	Land-water combined & special scenarios

Conventional electrodes are transmitting-electrode accessories for high-density surveys, connecting to cables via taps to inject current into the ground and establish an artificial field. Most feature a 316L stainless-steel housing that is rugged and corrosion-resistant, suiting corrosive soil and shallow-water environments; the sharp probe gives low contact impedance after insertion and resists oxidation/deformation; maintenance-free for stable long-term field use.

- Spec: 52cm long, 38mm outer diameter

- Cores: 2

- Protection rating: IP68 (land/shallow-water/corrosive soil)

Ordering Information

Material Code	Model	Name	Material	Specification	Application Scenario
M4.3002	SE-40	Stainless steel electrode	316L stainless steel	12*400mm	Resistivity (Tx/Rx)
M4.3005	CE-40	Pure copper electrode	Brass	5*300mm	Resistivity (Tx/Rx)
M4.3006	PE-1	Plate electrode	316L stainless steel	1001005mm	Hardened cement pavement
M4.3013	GE-40	Galvanized iron electrode	Galvanized iron	12*400mm	Long-term monitoring buried type
M4.3009	GE-1	Graphite electrode	Graphite	150*15mm	Long-term monitoring buried type
M4.3011	SE-1	Disc electrode	316L stainless steel	100*10mm	Long-term monitoring buried type
M4.3001	NP-1	Non-polarizable electrode	Lead chloride	75*100mm	IP Receiving

Flexible electrodes are adhesive electrode accessories for complex-curve and pipe-interior scenarios, connected to cables via welded leads to transmit irregular-surface electric-field signals to the acquisition system. A conductive-silicone + copper-mesh structure bends freely to fit any shape; a 4-core redundant design improves acquisition stability; IP67 suits humid and shallow-water environments; maintenance-free for stable long-term field use.

- Spec: 30cm long, 5cm wide

- Cores: 4

- Protection rating: IP67 (complex curves/pipe interiors)

Ordering Information

Material Code	Model	Name	Specification	Application Scenario
M4.3019	FPC-1	FPC flexible electrode	Custom	Research experiment
M4.3020	SIP-1	SIP flexible electrode	Custom	Research experiment

Junction boxes are core units for centralized multi-channel electrode access and signal switching in high-density systems, supporting 10/30-channel electrode access and enabling signal distribution between main unit and cables. ABS engineering-plastic housing with metal terminals, IP65; the matching F-type waterproof box adds IP67 protection for harsh field environments. Junction boxes fit the whole resistivity product line — clear structure, easy wiring, reliable protection.

- Spec: 10/30 channels, 201×168×300mm

- Protection rating: IP65 (junction box), IP67 (waterproof box)

WB-10

WB-30

Ordering Information

Material Code	Model	Name	Category	Material	Dimensions (L×W×H)	Channels/Cores	Protection Rating	Length	Rated Voltage	Rated Current	Application Scenario	Connection Method	Compatible Devices	Service Life
M1.1005	WB-10	10-channel junction box	Junction Boxes	ABS engineering plastic + metal terminals	201×168×300mm	10 channels	IP65	—	250V	3A	10-electrode access/switching	Aviation plug + terminal block	All versions	≥5 years
M1.1006	WB-30	30-channel junction box	Junction Boxes	ABS engineering plastic + metal terminals	230×150×85mm	30 channels	IP65	—	250V	3A	30-electrode access/switching	Aviation plug + terminal block	All versions	≥5 years
M3.5085	—	F-type waterproof box (for WB-10)	Junction box accessory	Engineering plastic	200×120×75mm	—	IP67	—	—	—	WB-10 protective enclosure	Latch + screws	WB-10 only	≥5 years
M3.5086	—	F-type waterproof box (for WB-30)	Junction box accessory	Engineering plastic	230×150×85mm	—	IP67	—	—	—	WB-30 protective enclosure	Latch + screws	WB-30 only	≥5 years
M3.5087	—	F-type waterproof box (for resistance box)	Junction box accessory	Engineering plastic	158×90×60mm	—	IP67	—	—	—	Resistance-box protective enclosure	Latch + screws	RB-4 only	≥5 years

The resistance box is an auxiliary unit for electrode grounding-resistance compensation in high-density systems; a precision resistor network compensates and matches electrode grounding resistance, improving acquisition quality. Metal housing + precision resistor network, IP65. The resistance box fits all versions — clear structure, easy wiring, reliable protection.

- Spec: 158×90×60mm

- Protection Rating: IP65

Ordering Information

Material Code	Model	Name	Material	Dimensions (L×W×H)	Protection Rating	Application Scenario	Connection Method	Compatible Devices
M1.1007	RB-4	Resistance box	Metal housing + precision resistor network	158×90×60mm	IP65	Electrode grounding-resistance compensation	Terminal block	All versions

The Battery (lithium) is a portable rechargeable power supply for high-density, IP and online-monitoring systems, with a built-in large-capacity lithium battery supporting 150V/300V DC output. Charged from 110V~240V AC, GE-plastic housing, IP67; BP-150 outputs 150V/3A, BP-300 outputs 300V/3A, weighing only 7.5~8kg — portable and easy to use for short-to-medium field campaigns.

- Spec: 150V/300V, 3A output, GE plastic housing

- Protection Rating: IP67

- Patent No.:

BP-150

BP-300

Ordering Information

Material Code	Model	Name	Max Output Voltage	Max Output Current	Charging Voltage	Output Mode	Operating Temperature	Storage Temperature	Weight	Dimensions	Housing Material	Fuse Specification	Category
M0.5001	BP-150	150V DC boost power supply	150V	3A	110V~240V AC	DC output	-10 ℃/+50℃	-20℃/+60℃	7.5kg	L377W299H195mm	GE plastic	5.2*20mm	Lithium battery
M0.5003	BP-300	300V DC boost power supply	300V	3A	110V~240V AC	DC output	-10 ℃/+50℃	-20℃/+60℃	8kg	L377W299H195mm	GE plastic	6A 5.2*20mm	Lithium battery

The Booster (boost power supply) is a DC step-up unit for high-density surveys with no built-in battery, taking external 12~48V DC or 220V AC input to produce DC step-up output. BP-600 offers six selectable ranges 100/200/300/400/500/600V at >90% efficiency and works down to -40℃; BP-1000 gives 0~1000V adjustable output, suited to high-power IP surveys.

- Spec: 600V six-range selectable / 1000V adjustable, efficiency >90%

- Protection Rating: IP65

- Patent No.:

BP-600

BP-1000

Ordering Information

Material Code	Model	Name	Input Voltage Range	Max Input Current	Efficiency	Max Output Current	Output Voltage Range	Operating Temperature	Operating Humidity	Storage Temperature	Storage Humidity
M0.5005	BP-600	600V DC boost power supply	12~48V DC	35A	>90%	0.5A	100/200/300/400/500/600V selectable	-40℃~+45℃	<95%	-50℃~+70℃	<95%
M0.5006	BP-1000	1000V DC boost power supply	220V±10% AC	-	>90%	5	0~1000V adjustable	-10℃- 50 ℃	<95%	-20℃- 60 ℃	≤95%

Layout & Wiring

1D sounding: layout can deploy 24 electrodes at once, testing 12 points synchronously. Feature 1: Segmented centralized design uses SR-10/SR-20 bidirectional smart cable heads for electrode switching in high-density surveys. Feature 2: Sections can be joined indefinitely, meeting deep-profile and 3D high-density needs. Feature 3: Dual distributed high-density cable interfaces remove the need for a transition switch controller in cross-hole surveys. Main unit: GD-10/20, Advance/Supreme Switching device: SR-10/20 bidirectional smart cable head Cable: 12-tap bidirectional high-density cable (CE5/CB10 series), each tap has two independent connectors controlled by the two cable heads.

Segmented centralized design uses SR-10/SR-20 bidirectional smart cable heads for electrode switching, with indefinitely joinable sections. Feature 1: Sections can be joined indefinitely, meeting deep-profile and 3D high-density needs. Feature 2: Dual distributed high-density cable interfaces remove the need for a transition switch controller in cross-hole surveys. Main unit: GD-10/20, Advance/Supreme Switching device: SR-10/20 bidirectional smart cable head Cable: 12-tap bidirectional high-density cable (CE5/CB10 series), each tap with two independent connectors controlled by the two cable heads.

The GD-20 main unit features an independent 12-channel design; 1D layout deploys 24 electrodes at once, testing 12 points synchronously. Feature 1: 1D layout deploys 24 electrodes, testing 12 points synchronously. Feature 2: Supports 4-level sounding, dipole-dipole, pole-dipole, mid-gradient and custom arrays. Main unit: GD-20 Supreme/Advanced Switching device: Jumper box (WB-10/WB-30) Multi-core cable with non-polarizable electrodes for 1D resistivity/IP sounding.

Two connectors of the same tap are paralleled or connected to different electrodes, with BP power for high-power IP testing. Feature 1: The two connectors of one tap in parallel can carry double current. Feature 2: Connect a normal electrode and a non-polarizable electrode on the two connectors for IP measurement. Feature 3: With the BP-series high-power rectifier, high-power IP testing is possible. Main unit: GD-10/20 + BP-150/300/600/1000 high-power supply Switching device: SR-10/20 bidirectional smart cable head + jumper box 12-tap bidirectional high-density cable, supports parallel or high-current IP measurement.

Uses the mid-gradient method: A and B current electrodes fixed at both ends of the line, measurement electrodes distributed along it. Feature 1: Suited to large-area rapid surveying, detecting steeply dipping low-resistivity bodies. Feature 2: Multiple main units can measure synchronously, improving efficiency. Main unit: GD-10/20 Supreme/Advanced Switching device: SR-10/20 bidirectional smart cable head Cable: 12-tap bidirectional high-density cable.

Uses single-tap cable with a double-loop method for IP measurement: stainless-steel electrode transmits, non-polarizable electrode receives.

Feature 1: Stainless-steel electrode connected to P1 as the transmitting electrode.

Feature 2: Non-polarizable electrode used for receiving, enabling combined resistivity and IP measurement.

Main unit: GD-10/20 Supreme 2D+/3D+

Switching device: Jumper box + SR-10/20 cable head

Cable: Single-tap high-density cable.

Uses dual-tap cable in a single-loop layout, the two taps connecting a normal electrode and a non-polarizable electrode. Feature 1: The two taps connect a normal electrode and a non-polarizable electrode. Feature 2: Controlled by the two cable heads respectively, enabling synchronous resistivity and IP measurement. Main unit: GD-10/20 Supreme 2D+/3D+ Switching device: SR-10/20 bidirectional smart cable head Cable: Dual-tap high-density cable (CE5 series).

Use floats to suspend waterproof cable on the water surface, with the main unit on a boat or ground, to study the sub-bottom geoelectric structure. Feature 1: Various array measurements to study the sub-bottom geoelectric structure. Feature 2: For long sections, rolling tests with GPS-assisted positioning. Main unit: GD-10/20 (with waterproof cable) Switching device: SR-10/20 waterproof cable head Cable: Waterproof high-density cable.

Continuous high-density measurement on water surfaces, suited to continuous profile surveys of rivers, lakes, reservoirs and other water bodies. Feature 1: Suited to continuous profile surveys of rivers, lakes, reservoirs, etc. Feature 2: Obtains sub-bottom geoelectric section information. Main unit: GD-10/20 (with waterproof cable) Switching device: SR-10/20 waterproof cable head Cable: Waterproof high-density cable.

Electrodes placed in the same or different boreholes, connected via multi-core cable to surface acquisition, bringing measuring points closer to the target. Feature 1: Points closer to the target give higher signal fidelity and more accurate data. Feature 2: The custom cable needs no cable-head termination, 1m spacing, using a dedicated cross-hole script. Main unit: GD-10/20 Supreme/Advanced Switching device: Custom cable head + transition switch Cable: Borehole distributed cable (CD30 series), 1m spacing.

In the lab, set up a 1D test environment, create a 1D IP test task for instrument-operation training and teaching demos. Feature 1: Create a 1D IP test task for operation training and demos. Feature 2: Can measure current, voltage, apparent resistivity, chargeability, etc. Main unit: GD-10/20 Switching device: Jumper box Cable: Standard multi-core cable + stainless-steel/non-polarizable electrodes.