Groundtech 3D Ground Scanners & Deep Seeking Detectors

Groundtech 3D Ground Scanners & Deep-Seeking Metal Detectors

Groundtech builds professional 3D ground scanners and deep-seeking metal detectors for treasure hunters, prospectors, archaeologists, and surveyors who need to see what a conventional detector can't reach. Instead of reading only the first few inches of soil, a Groundtech scanner measures changes in the ground and renders them as a 3D image — so you can pinpoint buried metal, natural gold, voids, and tunnels by depth and position before you ever break ground. Serious Detecting carries the full Groundtech range, shipped from the US with the manufacturer's 2-year warranty.

How a Groundtech 3D ground scanner works

A 3D ground scanner measures tiny changes in the ground's magnetic field as you walk a grid, then maps them into a color 3D model — on your phone or tablet, or on the GR-4 and A2's own built-in screen. Metal targets such as gold, silver, and buried caches show up as distinct signatures, while empty pockets reveal cavities, cellars, and tunnels. Because the system reads the ground itself rather than relying on a single coil pulse, a Groundtech scanner can flag targets several meters deep — up to 7 to 20 meters depending on the model and soil — well beyond the range of a typical VLF or pulse-induction detector. That's why it's classed as a deep-seeking, treasure-grade instrument.

Choosing the right Groundtech model

The range scales with how deep you need to see and how much detail you want:

• Groundtech GR-3 — the entry point: an ultra-light, fully wireless 3D ground scanner that reaches up to 7 m, ideal for first-time scanner buyers and fast field surveys.
• Groundtech GR-3 PLUS — the same compact wand with a dual-sensor system that roughly doubles depth to 15 m.
• Groundtech GR-4 — a standalone 3D ground scanner reaching 15 m, with its own built-in color screen so it works without a phone or tablet, plus six scanning modes.
• Groundtech GR-4 Dual — the GR-4 scanner plus an integrated pulse-induction metal detector (to about 3 m), so you can scan and detect from one unit.
• Groundtech A2 — a versatile hybrid pairing 3D ground scanning to 20 m with an integrated PI metal detector.
• Groundtech A2 GEO — the flagship: it adds a geo-electric (resistivity) mode to the A2 for locating groundwater, tunnels, tombs, and caves at the greatest depths.