Laboratory Resistivity Measurement System

The GD Research-Grade Laboratory Resistivity System is a configurable solution for laboratory geophysical experiments, including sandbox and rock/soil testing. It integrates electrical survey instrumentation, power supply and switching units, with system configurations tailored to specific experimental requirements.

Product Overview

Designed for research and teaching, the GD laboratory system is based on a single-channel resistivity instrument that can be upgraded to multi-channel operation. The integrated unit combines transmission, signal acquisition and a built-in voltage booster.

The system includes the main unit, high-density cables and switching units, stainless-steel electrodes, an acquisition terminal, and a basic DIGspace account. It supports more than 1,000 electrode takeouts and uses square-wave transmission with 24-bit A/D conversion. GPS and BeiDou dual-system timing synchronization, with a stated timing accuracy of 30 ns, supports laboratory resistivity imaging, induced polarization (IP) measurements and long-term time-lapse monitoring.

Product Catalog

Ordering Information

Laboratory electrical workstation (custom)

Technology Highlights

High-Resolution Signal Acquisition

With 24-bit A/D conversion, a sampling resolution of up to 2 nV, and a dynamic range of 140 dB, the system is designed to capture weak electrical signals in controlled laboratory experiments.

Power-Line Noise Rejection

Selectable 50/60 Hz power-line rejection of ≥120 dB helps suppress mains interference while maintaining signal fidelity across the specified frequency range.

Multi-Window IP Measurement

Supports up to 20 IP decay time windows and 1–255 stacking iterations, enabling detailed characterization of the measured decay response.

SP Compensation and Automatic Gain Control

Hardware self-potential (SP) compensation of ±10 V helps reduce natural-potential interference. Automatic gain control, with a range of 1/8 to 128, adapts acquisition to signals of different amplitudes.

Background Signal Monitoring

The system can record the background voltage time series as a 100 Hz waveform, providing additional data for assessing potential interference during post-acquisition analysis.

Integrated Acquisition and Data Processing

Supports real-time time-lapse acquisition monitoring and online inversion with automatic imaging. Connectivity options include Wi-Fi and Ethernet, with mobile app support for field operation. Built-in protection functions include overcurrent, overvoltage, short-circuit, overtemperature and lightning protection.

Application Cases

Brazil Gold Ore Exploration Case

Tailings Pond Bottom Real‑Time Online Monitoring System Case

Cross‑hole High‑density Electrical Imaging Case of Anti‑seepage Wall

Groundwater Investigation for Leachate Treatment Plant

Foundation Depth Survey Case of Beijing Five‑Pagoda Temple

Landfill Leakage Investigation

Technical Specifications

Parameter	Research Configuration (Custom)
Maximum Transmit Voltage	1200V
Transmit Voltage Sampling Resolution	0.2V
Maximum Transmit Power	7.2KW
Maximum Transmit Current	6A
Current Measurement Accuracy	0.001
Maximum Current Sampling Resolution	10nA
Pulse Waveform	Standard square wave
Pulse Width	0.25s, 0.5s, 1s, 2s, 4s, 8s, 16s, 32s, 64s
Number of Receiver Channels	1 channel
Maximum Supported Electrode Count	>1000
Voltage Measurement Range	±2.5V
Voltage Measurement Accuracy	0.2%+0.3μV (±2.5V)
Maximum Voltage Sampling Resolution	2nV
SP Compensation Range	±10V
Dynamic Range	140dB
Filter Response	10Hz attenuation -0.6dB; 50/60Hz attenuation -110dB; 256Hz attenuation -120dB; 512Hz attenuation -160dB
Gain Range	1/8~128, auto gain
Linearity	0.00001
Power-line Rejection	50Hz/60Hz software selectable, ≥120dB
Sampling Rate	50Hz, 100Hz, 250Hz selectable
Input Impedance	≥100MΩ
A/D Resolution	24bit

Key Features

24 bit + 2 nV + 140 dB + 100 MΩ + ±10 V SP compensation

Reproducible >1000-channel auto scanning + constant current/voltage + script import + 1–255 iterations

Resistivity + 50% duty IP (20 time windows) + 100 Hz background waveform

Customizable electrodes/arrays/switching/interfaces + 32 GB + time-lapse monitoring + DIGspace online inversion mapping

Accessories

The cable head is the connection unit between the high-density cable and the main unit, used for electrode-signal acquisition and switching. Its PC and ABS housing is rugged and durable; the Amphenol waterproof plug is convenient and reliable; maintenance-free, with no charging required.
- Spec: 215mm long, 50mm outer diameter
- Protection rating: IP67

Ordering Information

Material Code	Model	Name	Material	Weight	Application Scenarios	Acquisition Channels
M1.0001	SR-10	Smart Dual-Direction Cable Head	PC + ABS housing	0.4kg	Distributed scenarios	Single channel
M1.0006	SR-60	Single-channel distributed switching box	Aluminum-alloy housing	5kg	Land-water combined & borehole-surface combined	Single channel

The centralized switching box provides centralized switching management for multi-channel high-density cables. It accepts high-density cables and enables automated measurement of large-scale arrays.
- Spec: 201x168x300mm
- Protection rating: IP65

Ordering Information

Material Code	Model	Name	Material	Weight	Application Scenarios	Acquisition Channels
M1.0003	CS-60	Centralized switching box	Aluminum-alloy housing	5kg	Surface, cross-hole, laboratory	Single channel

High-density cables are core accessories for high-density electrical surveys. Multiple cable taps connect to the electrodes, carrying electrical signals between the electrodes and the acquisition system. 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.

The land high-density cable is the standard signal cable for land electrical surveys. It connects to electrodes through taps, and all tap signals are carried along a single cable to the main unit. Copper core + TPU jacket, flexible and tensile-resistant, max transmit voltage 800V, max transmit current 2.5A; tap spacing from 0.5m to 20m and 5/10/15/30/60-tap versions, split into single-tap and dual-tap types, suited to land electrical profiling and areal measurement. Single-tap cables use one tap per position, each connected to an electrode through an independent channel — simple in structure, easy to maintain, and the mainstream configuration for high-density surveys.

- Spec: 10~30 taps, 0.5~20m 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
M1.2014	CB30-5	Single 30-tap cable, 5m spacing	Copper core + TPU jacket	Single-tap	151m	800V	2.5A	30	Land survey	5.1m
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	—	—	—

The overwater / borehole high-density cable is a dedicated signal cable for freshwater and marine electrical surveys, using a single-tap structure with a waterproof, tensile-resistant design to support both freshwater and marine working environments. Copper core + TPU jacket + beryllium-bronze nickel-plated taps, waterproof and tensile-resistant, max transmit voltage 800V, max transmit current 2.5A; 30/60-tap versions with 5m/10m spacing, suited to water-area electrical profiling and areal measurement. Single-tap cables use one tap per position, each connected to an electrode through an independent channel — simple in structure, easy to maintain, and the mainstream configuration for high-density surveys.

- Spec: 30/60 taps, 5m/10m spacing, max 800V/2.5A

- Protection rating: IP68

Ordering Information

Material Code	Model	Name	Material	Plug	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	Single-tap	160m	800V	2.5A	30	Freshwater survey	120kg	5m	Beryllium bronze, nickel-plated
M1.2017	CF30-5B	Single 30-tap freshwater cable, 5m spacing	Copper core + TPU jacket	Single-tap	320m	800V	2.5A	30	Freshwater survey	120kg	5m	Beryllium bronze, nickel-plated
M1.2018	CF60-5	Single 60-tap freshwater cable, 5m spacing	Copper core + TPU jacket	Single-tap	320m	800V	2.5A	60	Freshwater survey	—	5m	Beryllium bronze, nickel-plated
M1.2019	CD30-5	Single 30-tap borehole cable, 5m spacing	Copper core + TPU jacket	Single-tap	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	Single-tap	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	Single-tap	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	Single-tap	160m	800V	2.5A	30	Marine survey	500kg	5m	Tantalum-plated titanium
M1.2023	CM30-5B	Single 30-tap marine cable, 5m spacing	Copper core + TPU jacket	Single-tap	320m	800V	2.5A	30	Marine survey	500kg	5m	Tantalum-plated titanium
M1.2024	CM60-5	Single 60-tap marine cable, 5m spacing	Copper core + TPU jacket	Single-tap	320m	800V	2.5A	60	Marine survey	500kg	5m	Tantalum-plated titanium
X	Custom	Custom survey line	Copper core + TPU jacket	Single-tap	X	800V	2.5A	—	—	—	—	—

Standard cables are connection and transmission lines for high-density and general electrical surveys, with no tap structure, mainly used for direct device-to-device signal links, remote connection to A and B current electrodes and online monitoring. Copper core + TPU jacket is flexible and tensile-resistant, max transmit voltage 800V, max current 2A, compatible with the entire 1st-to-3rd-generation resistivity product line. Standard cables are subdivided by use into AB cable, HDPE 1D cable (online monitoring), 1D cable and straight-through cable.

The HDPE 1D cable is a dedicated signal cable 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 transmit current 16A; available in 250m/500m/1000m lengths, suited to long-term online monitoring and time-lapse electrical observation.

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

- Protection rating: IP66

Ordering Information

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

The straight-through cable is a connection cable for direct device-to-device signal links in high-density systems. With no tap structure, it comes in 14/19/30-core versions for various special scenarios. Copper core + TPU jacket; available from a 2 m standard length up to 700 m for long-distance transmission, with a clear structure and easy wiring.

- Spec: 3~32 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	Direct connection between devices or cables	Customizable	Land-water combined & special scenarios
M1.3002	ZTX-19	19-core straight-through cable	Direct connection between devices or cables	Customizable	Land-water combined & special scenarios
M1.3003	ZTX-30	30-core straight-through cable	Direct connection between devices or cables	Customizable	Land-water combined & special scenarios

Conventional electrodes are the transmitting-electrode accessory for high-density surveys, connected to the cable through taps to inject current into the ground and build an artificial electric field. The 316L stainless-steel housing is rugged and corrosion-resistant, handling corrosive soils and shallow water; the sharp probe drives into the soil with low contact impedance and resists oxidation and deformation; maintenance-free for stable, reliable long-term field work.

- 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	Stainless steel	12*400MM	Resistivity - (transmit, receive)
M4.3005	CE-40	Pure copper electrode	Brass	5*300MM	Resistivity - (transmit, receive)
M4.3006	PE-1	Plate electrode	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	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 patch electrode	Custom	Research experiment
M4.3020	SIP-1	SIP flexible patch electrode	Custom	Research experiment

The junction box is the core unit for centralized multi-channel electrode connections and signal routing in high-density systems. It supports 10-channel / 30-channel electrode connection, distributing and routing signals between the main unit and the cables. ABS engineering-plastic housing with metal terminals, protection rating IP65; the matching F-type waterproof enclosure adds IP67 protection for harsh field conditions. The junction box works with the entire 1st-to-3rd-generation GD-10/GD-20 line, with a clear structure, easy wiring and reliable protection.

- Spec: 10-channel / 30-channel, 201×168×300mm

- Protection rating: IP65 (junction box)

WB-10

WB-30

Ordering Information

Material Code	Model	Name	Material	Dimensions (L×W×H)	Protection Rating	Rated Voltage	Rated Current	Application Scenario	Connection Method	Compatible Devices
M1.1005	WB-10	10-channel junction box	ABS engineering plastic + metal terminals	201×168×300mm	IP65	250V	3A	10-electrode access/switching	Aviation plug + terminal block	All versions
M1.1006	WB-30	30-channel junction box	ABS engineering plastic + metal terminals	230×150×85mm	IP65	250V	3A	30-electrode access/switching	Aviation plug + terminal block	All versions

The conversion box is a connection unit for multi-channel signal distribution and conversion in high-density systems. It supports 10-channel / 30-channel signal distribution, extending channels between the main unit and the cables. ABS engineering-plastic housing with metal terminals, protection rating IP65; the aviation-plug + terminal-block design makes wiring easy, with a clear structure and reliable protection.

- Spec: 10-channel / 30-channel

- Protection rating: IP65

Ordering Information

Material Code	Model	Name	Category	Material	Dimensions (L×W×H)	Channels/Cores	Protection Rating	Rated Voltage	Rated Current	Application Scenario	Connection Method	Compatible Devices	Service Life
M1.1003	GD20-TXH-5	5-channel conversion box	Conversion Boxes	ABS engineering plastic + metal terminals	Customizable	5 channels	IP65	250V	3A	5-channel signal distribution	Aviation plug + terminal block	2nd-generation GD-20	≥5 years
M1.1004	GD20-TXH-12	12-channel conversion box	Conversion Boxes	ABS engineering plastic + metal terminals	Customizable	12 channels	IP65	250V	3A	12-channel signal distribution	Aviation plug + terminal block	2nd-generation GD-20	≥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 the electrode grounding resistance to improve signal quality. Metal housing + precision resistor network, 4-channel design, protection rating IP65; the matching F-type waterproof enclosure provides IP67 protection. The resistance box is compatible with all versions of the resistivity instruments, with a clear structure, easy wiring and reliable protection.

- Spec: 4-channel, 158×90×60mm

- Protection rating: IP65

RB-4

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

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

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

- Protection rating: IP67

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	—	3A	110V~240V AC	DC output	-10 ℃/+50℃	-20℃/+60℃	8kg	L377W299H195mm	GE plastic	6A 5.2*20mm	Lithium battery

Booster (step-up power supply) is a DC step-up unit for high-density surveys. With no built-in battery, it takes an external 12~48V DC or 220V AC input and produces a stepped-up DC output. The BP-600 offers six selectable ranges of 100/200/300/400/500/600V at >90% efficiency and works in -40℃ extreme cold; the BP-1000 provides 0~1000V adjustable output for high-power IP surveys.

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

- Protection rating: IP65

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℃	—
M0.5006	BP-1000	1000V DC boost power supply	220V±10% AC	-	>90%	5	0~1000V adjustable	-10℃- 50 ℃	<95%	-20℃- 60 ℃	—

Layout & Wiring

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

Laboratory Resistivity Measurement System

Product Overview

Product Catalog

Ordering Information

Laboratory electrical workstation (custom)