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.
This 12 X 10 SEF coil is just slightly larger and heavier than the std 11" coil currently fitted to FBS models. Excellent balance compensates for any weight diference.
The adavantage of this coil 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 FBS technology models: E-Trac, Explorer (all versions), Safari & Quattro