The AL8 is a powerful miniaturized electromagnetic survey instrument that efficiently and inexpensively detects conductive and magnetic outcrops or boulders hidden under up to 10 feet (3 meters) of overburden. With the Beep Antenna, you can sample as many conductive outcrops and floats in one season as a mining company drills in ten years of standard operation. The Beep Antenna sends different sound signals for magnetite and conductive materials, and their relative values are displayed to help pinpoint high values. Simultaneous measurements of the conductivity and susceptibility (magnetite content) are displayed. It detects sulfide floats, veinlets and conductors such as pyrite, pyrrhotite, chalcopyrite (Cu), graphite, pentlandite (Ni), galena (Ph), etc. and even silver (Ag) and gold (Au) nuggets.