Groundtech GR-4 DUAL 3D Ground Scanner (Dual Sensor)

Description

Groundtech GR-4 Dual, a powerful 3D ground scanner with integrated Pulse-Induction (PI) detector. Detect metals, voids, tunnels, and cavities up to 15 m deep. Ideal for treasure hunters, archaeologists & professional prospectors.

Highlights:

Dual-Technology: 3D Ground Scanning + Pulse-Induction (PI) Metal Detection: The GR-4 Dual combines a full 3D ground scanner (MFS-2 dual-sensor gradiometer) with an integrated PI detector. This unique dual system lets you both visualize underground structures (voids, tunnels, cavities, metal masses) and perform conventional metal detection in one device — no need to carry two separate tools.

Deep Detection Up to ~15 Meters (3D scan): With its advanced ground-scanning sensor technology, the GR-4 Dual can reach depths up to 15 meters, depending on soil and target size, allowing detection of deeply buried objects, large metal masses, or subterranean structures that many standard detectors can’t reach. 

Six Versatile Scanning Modes for Flexible Use: The unit offers 6 different modes including 3D Ground Scan, Live Scan, Pinpointer, Detector Quick Scan, Detector Advanced Scan, and a hybrid 3D + Detector mode. This flexibility makes it suitable for a wide range of tasks — from quick metal checks to full underground mapping.

Real-Time 3D Visualization & Mobile App Integration: Results display directly on the device and can be synced with the companion G-Portal app (available on Android & iOS) for detailed 3D/4D analysis, saving scan sessions, and sharing data. This makes it easier to interpret anomalies and plan digs based on accurate subsurface maps.

Optimized for Tough Ground: Mineralized, Saline or Complex Soil: Thanks to its PI detector and dual-sensor scanning, the GR-4 Dual performs reliably even in difficult terrains — mineralized, salty or coastal soils — where conventional detectors often struggle. This makes it a strong choice for professional prospecting, archaeological work, or treasure hunting in challenging ground conditions.

Multi-Purpose Functionality
The GR-4 PLUS is suitable for detecting a wide range of targets, including:

• Buried gold items: treasure chests, ancient coins, and jewelry
• Non-ferrous metals: silver, bronze, copper artifacts
• Ferrous metals: iron and steel objects
• Subterranean anomalies: tunnels, chambers, and bunkers

Includes:

Main Unit, Carrying bag, User manual, Charging adapter, MFS-2 Dual Sensor, PiD35 detector search coil, 2-Year Warranty.

More Details

Key Features of GR-4 PLUS

3D Graphics
Get the results quickly with the understandable graphics.

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.

Detection Modes

The GR-4 Dual supports several scan modes — 3D Ground Scan, Live Scan, Pinpointer, and Detector Quick Scan — ensuring flexibility for all exploration conditions.

The GR-4 Dual model in the series is equipped with an integrated Pulse Induction (PI) detector system in addition to its 3D ground scanning capabilities.

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.

Specifications