Groundtech GR-4 Dual 3D Ground Scanner and Integrated Pulse Induction Metal Detector

The Groundtech GR-4 DUAL is an elite hybrid system that integrates an advanced 3D ground scanner with a high-performance 1 kHz pulse induction metal detector, giving serious treasure hunters, archaeologists, and relic seekers two powerful technologies in a single streamlined device. Map subterranean voids such as tunnels and chambers at depths of up to 49 feet (15 meters) with the 3D imaging system, then rapidly search and discriminate metals in the upper soil layers down to about 10 feet (3 meters) with the heavy-duty pulse system. Everything runs on the built-in HD color screen, with no phone or tablet required.

Two Instruments in One Device

Switch seamlessly between high-depth 3D ground scanning and conventional pulse induction detecting. The 3D Ground Scanning System detects, measures, and locates buried metals, magnetic objects, graves, rooms, and cavities such as tunnels, while the detector side distinguishes ferrous (iron) from non-ferrous metals for fast, practical hunting. Because it is pulse induction, the detector stays stable in heavily mineralized soil where standard machines struggle.

Six Scanning Modes for Complete Exploration

The GR-4 DUAL is equipped for any terrain with 3D Ground Scanning, Live Scanning, Pinpointer Function, Detector Fast Scanning, Detector Advanced Scanning, and 3D Ground Scanning Detector Mode. The Detector Advanced Scan mode allows detailed settings to filter out trash, detect deeper targets, and clearly separate ferrous junk from valuable finds like gold, silver, and copper.

Perfect MFS-2 Dual Sensor Technology

High-sensitivity MFS-2 dual gradiometer sensors with a plus or minus 2000 microtesla measurement range deliver sensitive, deep scanning while minimizing the margin of error. Combined with a fast 240 MHz processor and 12-bit A/D converter, the GR-4 DUAL renders precise, color-coded results in real time, graphically separating magnetic metals (iron or steel) from non-magnetic treasures (gold, silver, or copper).

Standalone Operation with 3D and 4D Analysis on Your Smartphone

No external phone or tablet is required to start your hunt. Settings, active scanning modes, and real-time color targets display directly on the integrated HD color screen. For deeper analysis, pair via Bluetooth 4.2 BLE with the G-Portal application for Android and iOS to view detailed 3D and 4D visualizations, isolate target shapes, and generate comprehensive survey reports. The device supports 11 languages on-screen and 25 languages in the mobile app.

Field-Adaptive Design with PiD35 Coil Included

The GR-4 platform's foldable modular body, adjustable grip angle, and removable sensor module make it a leader in its class for portability and field adaptability. The included PiD35 detector search coil has you hunting straight out of the box.

Factory Included Items:

• Groundtech GR-4 DUAL Main Unit (with integrated HD color screen)
• MFS-2 Dual Sensor Module
• PiD35 Detector Search Coil
• Type-C Fast Charging Adapter
• Heavy-Duty Field Carrying Bag
• User Manual & Official Warranty Documentation (2-Year Manufacturer Warranty)

Specifications:

Main Unit

• System type: 3D Ground Scanner and Integrated Pulse Induction Metal Detector
• Sensor technology: MFS-2 Dual Sensor Technology (Gradiometer), plus or minus 2000 µT
• Detector technology: Pulse Induction, 1 kHz frequency
• Maximum 3D scan depth: up to 49 ft (15 m), depending on soil structure, object size, and scanning function
• Maximum detector depth: up to 10 ft (3 m)
• Scanning modes: 3D Ground Scanning, Live Scanning, Pinpointer, Detector Fast Scanning, Detector Advanced Scanning, 3D Ground Scanning Detector Mode
• Processor: 240 MHz CPU with 12-bit A/D converter
• Display: integrated HD color screen for standalone field use
• Battery: 3.7 V Li-ion rechargeable
• Operating time: approx. 6 hours in Pulse Induction Detector mode, approx. 10 hours in 3D scanning mode
• Charging input: Type-C (supports 25 W fast charging adapters)
• Operating temperature: 32°F to 158°F (0°C to 70°C)
• Storage temperature: -4°F to 140°F (-20°C to 60°C)

Data Transmission

• Technology: Bluetooth 4.2 BLE
• Connection: real-time transfer to smartphone or tablet

Analysis Software

• Mobile: G-Portal Application for Android & iOS (3D/4D analysis)
• Languages: 11 on-device, 25 in the mobile app

Weighing the GR-4 DUAL against the standalone GR-4 or the deeper A2 hybrids? Our Groundtech buyer's guide explains which model matches your hunting goals and budget.