The new GOLD DETECTOR is a "3D Gradiometer System" and a "Magnetometer" at the same time. 2 properties in one device. A depth search metal detector and a "3D gradiometer" at the same time. You can switch between both properties. Gradiometer, 1) Geodesy: Gravity gradiometer, the arrangement of several accelerometers, which are between 10 cm and 1 m apart, depending on the design. The difference in the readings of two accelerometers in a spatial direction divided by their distance corresponds to the measurement of a component of the gravitational tensor. An instrument that allows all nine components of the gravitational tensor to be measured is called a full-tensor gradiometer. Magnetometer: The GOLD DETECTOR is a passive metal detector and is used to locate ferromagnetic objects in the ground. It works as a magnetic field strength difference meter using the fluxgate principle. In the normal application, the vertical difference of the vertical component of the magnetic flux density is measured and displayed. This device has been designed to use in-depth search and can be used in the countryside both for surface probing and for the depth search.