The invention relates to a device for locating metallic objects, with at least one transmit coil (116) and at least one receive turn system (112, 114; 212, 214), which are inductively coupled to one another.
According to the invention, switching means (1, . . . , 8; 1′a, 2′a, 3′a, 1′b, 2′b, 3′b) are provided, which make it possible to vary the effective number of turns of the at least one receive turn system (112, 114; 212, 214).
The present invention also relates to a method for operating a device of this type, in particular a method with which the adjustment of a voltage U induced in a receive coil (112, 114; 212, 214) takes place by connecting an adjustment turn system (113, 115; 213′, 215′) to the turns (113, 115; 213, 215) of the receive turn system (112, 114; 212, 214).