Groundtech GR-3 3D Ground Scanner

The Groundtech GR-3 is an ultra-compact, completely wireless 3D ground scanner for treasure hunters, relic seekers, and archaeologists who want deep-seeking technology in a highly portable format. Weighing just 600 grams (1.3 lbs) with no heavy batteries or tangled cables, the GR-3 uses CN-D dual gradiometer sensors to reach scanning depths of up to 7 meters (approx. 23 feet). It 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.

Entry-Level 3D Ground Scanner with App

The GR-3 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, and chambers.

Deep Detection in an Ultra-Light Wand

The stick-style GR-3 is designed to be extremely simple and compact, making it accessible to everyone – there is nothing to assemble and no external battery pack to carry. Depending on the size of the target and the soil structure, the scanner reaches depths of up to 7 meters, 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 to your phone or tablet, and re-evaluate promising anomalies whenever needed – no notebook or extra software required.

Built for the Field

Engineered to deliver stable, high-resolution subsurface data across challenging ground conditions – sandy beaches, 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, including portable power banks.

Factory Included Items:

• Groundtech GR-3 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: CN-D Dual Sensor Technology, ±2000 µT
• Maximum scan depth: up to 7 m (approx. 23 ft), 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. 1.3 lbs (600 g)
• 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: –20°C – 60°C (–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

Wondering if 7 meters is enough depth for your sites? Our Groundtech buyer's guide compares the GR-3 against every model in the range so you can buy with confidence.