Groundtech GR-3 PLUS 3D Ground Scanner

The Groundtech GR-3 PLUS is an ultra-lightweight, completely wireless 3D ground scanner for treasure hunters, relic seekers, and archaeologists who search for deeply buried caches, artifacts, and cavity structures such as tombs, tunnels, and chambers. This advanced edition keeps the compact 600-gram wand design of the GR-3 series and upgrades the internal CN-D dual sensor system to reach scanning depths of up to approx. 49 feet – double the base model. The GR-3 PLUS includes the Groundtech App for installation on your Android or iOS smartphone, delivering real-time, color-coded 3D scan graphics directly to the palm of your hand.

Deep-Seeking 3D Ground Scanner with App

The GR-3 PLUS measures natural electromagnetic variances in the soil with dual gradiometer sensors, allowing treasure hunters to detect buried metals and underground anomalies and visualize the scan data immediately on their smartphone via the Groundtech App over Bluetooth. Intuitive color graphics differentiate magnetic metals like iron and steel from non-magnetic treasures like gold, silver, and copper – and reveal empty spaces that mark tunnels, graves, caves, and chambers.

Double the Depth, Same Ultra-Light Wand

Weighing just 1.3 lbs with no external battery packs or tangled cables, the GR-3 PLUS packs professional-grade geophysical exploration power into a stick-style scanner you can carry all day. The upgraded high-precision sensor system reaches up to 15 meters deep depending on soil structure and target size, locating targets far beyond the reach of conventional coil detectors.

Four Scanning Modes for Any Search Scenario

Adapt instantly to any terrain with Automatic Ground Scanning for systematic grid surveys, Manual Ground Scanning for full control over each measurement, Live Scan for quick, unbound target tracking, and a precise Pinpointer function to lock onto exact target locations before you dig.

Analyze Scan Data in Real Time on Your Smartphone

Scan data transmits instantly via Bluetooth 4.2 BLE to the Groundtech GR-3 App for Android and iOS, available in 23 languages. Analyze target depth, size, and structural shape in detailed 3D graphics, save your scans, and revisit promising anomalies – no notebook or extra software required.

Built for the Field

Engineered to deliver stable, high-resolution subsurface maps across challenging ground conditions – sandy beaches, heavily mineralized rocky hillsides, and dense clay soils. The internal Li-ion battery runs approximately 8 hours per charge and recharges over USB-C with support for 25 W fast charging adapters.

Factory Included Items:

• Groundtech GR-3 PLUS Main Unit
• 5-Volt Charging Adapter & Type-C Charging Cable
• Carrying Case
• User Manual & Official Warranty Documentation (2-Year Manufacturer Warranty)

Specifications:

Main Unit

• System type: 3D Subsurface Visualization / Ground Scanner (Gradiometer)
• Sensor technology: High-Precision CN-D Dual Sensor Technology, ±2000 µT
• Maximum scan depth: up to 49ft (15 m), depending on soil structure and object size
• Scanning modes: Auto Ground Scan, Manual Ground Scan, Live Scan, Pinpointer
• Processor: 240 MHz CPU with 12-bit A/D converter
• Dimensions (L x W x D): 31.9 x 2.8 x 2.8 in (810 x 70 x 70 mm)
• Weight: approx. 600 g (1.3 lbs)
• Battery: 3.7 V Li-ion rechargeable (internal)
• Operating time: approx. 8 h
• Charging input: 5 V – 2 A, Type-C (supports 25 W fast charging)
• Operating temperature:  32°F – 158°F  (0°C – 70°C)
• Storage temperature: –4°F – 140°F (–20°C – 60°C)

Data Transmission

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

Smartphone Requirements for Groundtech GR-3 App

• Compatibility: Android & iOS
• Wireless connection: Bluetooth 4.2 BLE
• Languages: 23 supported

Torn between the GR-3 PLUS and a model with a built-in screen? Our Groundtech buyer's guide breaks down depth, features, and price across the full lineup.