Groundtech GR-4 Dual

The GR-4 Dual is the most capable instrument Groundtech make, pairing a 3D ground scanner with an integrated pulse induction metal detector so one unit covers both jobs. The scanning side maps voids and structures to around 15 meters; the pulse induction side searches and discriminates metal in the upper layers, where mineralized ground defeats VLF machines. Results display on a built-in color screen, with deeper 3D and 4D analysis available through the companion app. Serious survey equipment.