Groundtech GR-4

The GR-4 is the more advanced scanner in the Groundtech range, built around a sensor system that reads ground structure at depth and presents it as interpretable 3D imagery. It is designed for locating voids, chambers and substantial buried objects rather than coins and relics, with the scan area and depth to survey a site methodically. Reading the imagery well takes practice, and the right configuration depends on what you are looking for and how deep.