The New Dimension of Discovery
The new generation GR-4 is an advanced ground scanning and detection system that allows you to detect underground anomalies, perform 3D analysis, and evaluate the results instantly.
While scanning with the GR-4 Dual Model, settings and results are displayed to the user on the integrated screen of the device. It also provides real-time detailed and 3D analysis through the G-Portal (Groundtech Portal) application, specifically developed for Android and iOS devices.
Main Unit, Carrying bag, User manual, Charging adapter, MFS-2 Dual Sensor, PiD35 detector search coil
You can carry out scanning up to a 0 meter depth depending on the soil structure and the size of objects. Get results far beyond those achievable by standard detectors.
** Variable depending on the soil structure and the size of buried objects as well as the scanning function.
This technology delivers superior performance, particularly in areas where standard detectors struggle, such as soils with high mineral content, saline soils, and coastal regions. The PI system can detect targets deep underground without being affected by mineral density or soil composition. This allows large metal masses, buried precious metals, or deep cavities to be detected with much clearer and more stable signals.
The GR-4 Dual allows for easy conversion by simply mounting the PI search coil onto the section where the magnetic sensor is attached, thanks to its modular design. This enables both 3D ground scanning and professional PI detector searches with a single device. This feature offers users two powerful technologies simultaneously, without the need to carry two separate devices. As a result, the GR- 4 Dual offers a complete, standalone solution for multi - purpose field work, deep searches, and challenging terrain conditions.
Pinpointer Function The Pinpointer Function helps you find the pinpoint location of objects. Thanks to its specially developed software and hardware sensors, it can detect from significant depths.
Live Scanning Function With the Live Scanning Function, you can quickly and graphically detect underground objects. It allows for easy and quick detection of objects without being bound to a specific search pattern.
Detector Advanced Scan Mode The Detector Advanced Scan Mode allows users to make detailed settings, detect from deeper depths, distinguish between ferrous and non-ferrous metals, and detect valuable or non-valuable metals.
3D Ground Scanning Detector Mode The 3D Ground Scanning Detector Mode allows users to detect soil and metals using the detector function and analyze the results in 3D on the Groundtech Portal application.
| GR-4 | GR-4 DUAL | |
|---|---|---|
| System | 3D Ground scanner | 3D Ground scanner and integrated pulse induction metal detector |
| Sensor Technology | MFS-2 Dual Sensor Technology (Gradiometer) ± 2000 µT | MFS-2 Dual Sensor Technology (Gradiometer) ± 2000 µT |
| Detector Technology | - | Pulse Induction Technology – 1 kHz frequency |
| CPU | 240 MHz CPU - 12-bit A/D converter | 240 MHz CPU - 12-bit A/D converter |
| Depth | Up to 15 meters deep with the 3D scanning system | Up to 15 meters deep with the 3D scanning system Detector system up to 3 meters deep*** |
| Scanning Modes | 3D Ground Scanning, Live Scanning, Pinpointer | 3D Ground Scanning, Live Scanning, Pinpointer, Detector Fast Scanning, Detector Advanced Scanning |
| 3D Analysis Application | G-Portal Android & iOS 3D/4D Analysis Program | G-Portal Android & iOS 3D/4D Analysis Program |
| Language | Device 11 languages, Mobile App 25 languages | Device 11 languages, Mobile App 25 languages |
| Battery | 3.7 V Li-ion rechargeable battery | 3.7 V Li-ion rechargeable battery |
| Operating Time | The 3D scanning system takes approximately 10 hours. | The Pulse Induction Detector system takes approximately 6 hours, and the 3D Scanning system takes approximately 10 hours. |
| Wireless Connection | Bluetooth® 5 (LE) | Bluetooth® 5 (LE) |
| Operating Temperature | 0°C - 70°C | 0°C - 70°C |
| Storage Conditions | -20°C - 60°C | -20°C - 60°C |
| Warranty | 2 years | 2 years |
| Charging Input Voltage | Type-c 25w charger adapter | Type-c 25w charger adapter |
| Weight | ||
| Dimensions |
The GR-4 is a ground scanner that lets you map variations below the surface and examine the results in 3D. The GR-4 Dual offers the same ground scanning capability and adds a pulse induction (PI) detector mode for searching for metal with a coil.
Groundtech specifies up to 15 metres for 3D ground scanning on both models. For the GR-4 Dual’s PI metal detector, the stated maximum is 3 metres. The depth you can reach depends on the target size, ground conditions and scan mode. For example, the 15-metre figure does not mean a single coin can be detected at that depth.
The GR-4 Dual’s advanced detector mode can distinguish ferrous from non-ferrous signals. For 3D scans made with the standard GR-4, G-Portal displays signals from magnetic and non-magnetic targets on a graph. Gold, silver and copper are all non-ferrous metals, so a non-ferrous signal alone cannot identify gold.
On both models, you can select a scan mode and view the results on the built-in colour display. You can do this without a phone or tablet.
Use G-Portal on Android or iOS to save scans, examine them in more detail in 3D and create reports.
Choose your continent on Groundtech’s dealer page, then look for sellers listed in your country and their contact details. Find a Groundtech dealer