Pulse ar iii This professional metal detector and gold detector detects large objects at 6 m (20 feet) and deeper. Pulse-induction metal detector with microprocessor control for all kinds of metal available for gold seekers! There are important advantages in comparison to conventional metal detectors! ? pulse-induction technology with metal differentiation ? undisturbed search in mineralized grounds and salt water ? 5 different search coils with auto-adjustment ? high sensibility compared to gold and other precious metals ? convenient search and easy handling More than 6 m (20 feet) depth-activity: only with large search-coils it is possible to locate larger objects in a depth ofmore than 6 meters. In comparison, conventional detectors with one coil only allow a searching depth of less than 5 meters. Larger searching-areas: you can scan large areas with a 1 x 1 m (40") search-coil (pulse-induction technology) convenient and quick. (for example: for scanning a football ground you only need 3-4 hours! with a conventional tool with a normal coil you would need weeks). Undisturbed searching: saltwater, mineralized grounds are no problem for pulse ar iii because with the help of the reset button, most of the disturbing mineralized stones that lead to errors can be neutralised. Most of the mineralized grounds contain stones with metallical characteristics, which are denounced by most of the metal detectors. You can neutralize most of the stones with the pulse ar iii (in this case the searching-activity can be reduced a little). Differentiation of metal for medium and larger objects: the pulse ar iii can identify metallical objects beginning at a size of 5 x 5 cm (conventional metal detectors can only differentiate very small metallic items). You can save a lot of work in practice if deep lying metallical objects can be identified by its metal kind.