GIM-1 Single-channel Intelligent Resistivity & IP Meter

GIM-1 Single-channel Intelligent Resistivity & IP Meter丨High Density Resistivity Tester

GIM Series DC Electrical System is a new generation of high-density electrical system developed by Geotech based on many years of research and production of advanced electrical instruments, combined with the latest electronic technology. It integrates transmission and reception functions, has natural potential measurement function, 1D / 2D / 3D resistivity & induced polarization function.

The size and weight of the system are significantly reduced, and the main technical indicators and functions are ahead of similar instruments in the world, and it can work perfectly in various complex field environments.

The system can be widely used in metal and non-metal mineral resource exploration, urban geophysical exploration, railway bridge exploration, etc. It is also used in hydrological and engineering geological exploration such as finding groundwater, determining the location of hidden dangers in reservoir dam foundations and flood control embankments, and can also be used for geothermal exploration.

Electrical Principle

Principle

Measuring device

GIM includes Wenner arrangement (α), dipole arrangement (β), differential arrangement (γ), tripole arrangement (A), tripole arrangement (B), AM arrangement, dipole-dipole arrangement, Schlumberger arrangement (α2), Wenner-Schlumberg arrangement, edge gradient and custom device

High-density electrical measurement method

Automatic and continuous measurement with one pole arrangement, integrating bathymetry and profiling methods, and can combine multiple devices with multiple pole distances at the same time.

Function

Multifunctional Integrated Design

• Dual-mode resistivity and induced polarization (IP) measurements with self-potential compensation, supporting 1D/2D/3D/4D exploration.
• Built-in 12 standard arrays (Wenner, Schlumberger, dipole-dipole, etc.) and customizable configurations for complex geological challenges.

High Precision & Robust Adaptability

• 24-bit A/D conversion, ±48 V wide voltage range, current/voltage accuracy of 0.3% ±1 μA/μV.
• IP67 waterproof rating, operational at -20°C to +60°C. Titanium alloy electrodes support 100-meter underwater detection for extreme environments.

Intelligent Expansion & Efficient Acquisition

• Unlimited survey line expansion via bidirectional cascading controllers. Rolling measurement (2D/3D) improves efficiency by 50%+.
• 12-channel synchronous acquisition enables parallel multi-array measurements, capturing multi-electrode data in a single transmission.

Full-Scenario Coverage

• Patented segmented distributed cabling system compatible with ground/cross-hole/borehole-surface/waterborne surveys. Customizable 5-10m cable spacing.
• 3200W high-power transmission (1200V/6A) achieves 1500m penetration depth for resource exploration and engineering surveys.

Smart Software Ecosystem

• Real-time waveform monitoring, 20-time-window IP analysis, script programming, and Excel data import.
• Preprocessing system exports TXT/Excel/DAT/URF formats, compatible with mainstream inversion software.

Modular Engineering Solutions

• Custom components: SPB900 Intelligent Power Supply (850Wh Li-ion), IP-dedicated cables, borehole junction boxes, etc.
• Proven in complex scenarios: pollution monitoring (landfill sites), subsea exploration (mineral lake sediments), tunnel void detection.

GIM Component Introduction

System Host

The GIM host integrates the functions of transmission and reception, and has the functions of natural potential measurement, one-dimensional/two-dimensional/three-dimensional resistivity & induced polarization.

Receiving part
Number of channels	1, 5, 10
Waveform recording	Full waveform recording of current and potential
Self-compensation	±10V (automatic tracking compensation of full range)
Number of manual iterations	1~250 times
Number of automatic iterations	1~10 times
Voltage accuracy	0.3%±1uV
Current accuracy	0.3%±1uA
Measurement voltage range	±48V
Power frequency interference	≥120dB
A/D conversion bit	24 bits
Transmitter
Pulse width	1s, 2s, 4s, 8s, 16s, 32s, 64s
Pulse type	Square wave 0+0-
Maximum transmission power	3200W
Maximum transmission current	6A
Maximum transmission voltage	1200V
Input impedance	≥200MΩ
Protection	Sealing, overcurrent, overvoltage, short circuit, high temperature
Other parameters
Working temperature:	-10℃~50℃
Working humidity:	≤95%
Display:	5.7-inch full-color LCD, 640*480
LCD brightness:	1200cd/m2, visible in sunlight
Weight:	6KG
Storage temperature	-20℃~+60℃
Built-in battery:	16.8V/15.6AH lithium battery
External power supply:	DC9~16V
Storage capacity:	16GB
Charger voltage	120~250VAC (50HZ/60HZ)
Waterproof grade	IP67

Bidirectional Cascade Controller

• The bidirectional cascade controller is used in two-dimensional or three-dimensional high-density electrical measurement, which is equivalent to a repeater and converter, and is mainly used to switch electrodes.
• The controller is divided into two ends, the end marked with “HOST” is the head end, and the end marked with “END” is the tail end.

Standard weight	400g
Protection level	IP66
Operating temperature	-10℃~+50℃
Storage temperature	-30℃~+60℃
Dimension	L150*W82.3*H62mm
Shell material	PC material

Large cable

Material	Copper core wire, outer sheath is TPU material
Standard weight	CB10-5:5.5Fg ; CB10-10: 9Fg
Maximum current resistance	2A
Maximum withstand voltage	800V
Tensile strength	100Fg
Protection level	IP66
Operating temperature	-20℃~+60℃

Power Supply

The SPB900 power box uses imported ternary lithium batteries as raw materials, can achieve multi-level voltage switching, and has a power supply capacity of up to 850WH.

Output gear voltage	50V/100V/150V/300V/OFF
Maximum output current	3A
Maximum battery capacity	850WH
Weight	6kg
Shell material	PC Material
Dimension	357(L)*293(W)*193(H)mm
Battery Type	Ternary lithium battery
Operating temperature	-10℃-50℃

Connection

SPB900 power supply box supports multiple units connected in series. The connection method is as follows.

Single channel Configuration

Model	High Density Resistivity System	High Density IP System	customization
Power	3200W, 800V*2A	3200W, 800V*4A	3200W, 800V*4A
Self-powered	√	√
Conventional electrical method	√	√
2D resistivity	√	√
2D IP		√
3D Resistivity		√
4D Resistivity			√

*GIM-1 High-density Resistivity System: 2D and 3D high-density resistivity imaging system, adopts unique segmented centralized distributed wiring method, can infinitely extend the length of the measuring line, and includes 1D side depth, 2D and 3D resistivity.

*GIM-1 High-density IP System: 2D and 3D high-density resistivity and IP imaging system, adopts unique segmented centralized distributed wiring method, can replace all the above models in terms of function, and adopts double-tap IP cable.

Applications

Case Studies

Case 1: Site contaminant detection

Underground pollution investigation at a site

Case 2: High-density resistivity detection on water

Detection of water and sediment thickness in an abandoned mine lake

Case 3: Goaf and cavity detection

Identify the goaf or voids in the upper mountain and in front of the tunnel face.

Details provided by: Geotech, Leo.Li
To view the entire detailed introduction, please visit the following link.

https://geotechcn.net/products/electrical-instrument