Tesoro Sand Shark is a metal detector designed to search underwater for up to 60 feet deep.
It combines the circuits PI (Pulse Induction) to digital technologies. PI detectors are the best choice for the investigation of saltwater shoreline and, in fact, the single coil circuits are not sensitive to changes in the conductivity of the soil derived from soil salinity.
Sand Shark has two distinct operating modes: VCO and Normal. Using the VCO setting the tone detection will be all the more acute because the object is located on the surface, while if the object is deep tone detection will be weaker. In Normal mode the metal detector emits a single tone for all metals.