Minelab Commander DD Coils

DD coils provide a blade-like detection pattern for accurate ground coverage. They handle heavy and variable mineralisation better than monoloop coils and they allow the use of the Coil switch found on the GP series. Pinpointing is done along the centre of the coil.
 

Minelab Commander Mono Coils

Monoloop coils are more sensitive and deeper seeking than an equivalent sized DD coil, but can become erratic in very mineralised soils. The detection field is cone shaped, so it requires overlapping sweeps to ensure thorough ground coverage at maximum depth. Very sensitive around the outer rim, the coil can be tilted on edge when pinpointing tiny targets.