... , hematite, magnetite with Va-Ti or Ag-Cu; metal mine with Fe, Co,Ni. 2, Resolution:1nT Main ... hematite, magnetite with Va-Ti or Ag-CuMeasured indirectly: metal mine with Fe, Co, NiProbe for magnetic objectsDirection of ... in order to avoid poor contact with PDA, please hold the PDA and power supply box together when measuring. ... is no backup . Portable prospecting magnetometer, iron ore, metal detector