This New range of SEF - Symmetrical Electromagnetic Field Coils are a new patented technology. with over three years of research and development, they offer greater stablility and depth over similar sized search heads.
The adavantage of the SEF coils is stability. This means sensitivity can be increased to give greater depth. Average depth increase is reckoned to be 10% - 15% depending on ground conditions.
Fits All Minelab Sovereign Models.