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.
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.
| Laboratory electrical workstation (custom) |
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.
Selectable 50/60 Hz power-line rejection of ≥120 dB helps suppress mains interference while maintaining signal fidelity across the specified frequency range.
Supports up to 20 IP decay time windows and 1–255 stacking iterations, enabling detailed characterization of the measured decay response.
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.
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.
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.
| 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 |
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
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
| 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
| 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
| 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
| 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
| 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
| 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 |
Up to 250℃ high temperature
Oil and corrosion resistant
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)
| 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 | 100*100*5MM | 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)
| 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)
| 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
| 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
| 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
| 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 | L377*W299*H195mm | 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 | L377*W299*H195mm | 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
| 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 ℃ | — |
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.