21x17" SEF

21x17" S.E.F Butterfly DD Search Coils for Metal Detectors by DETECH

These double elliptical butterfly, Excelerator SEF (Symmetric Electromagnetic Field) coils, with lightweight open style for speed, comfort, extremely deeper finds, and sensitivity are, especially for gold. Designed to go deeper than standard DD coils and offer better performance when searching for gold.  You can search a large area quite fast due to the easy size and weight without losing any depth! Very stable, no false signals, able to work in difficult soils and locate smaller nuggets as well as larger deeper gold clusters. More accurate pinpointing to locate your gold finds. Use this coil when you are prepared to dig up the deeper gold cluster and nuggets. Field tests show the S.E.F. search coils really find deeper targets-many missed by other search coils. Made to locate Gold! Add this coil to your detector and go over the ground you previously searched and you will be pleased with the added gold you will find! All Detech search coils are produced using the highest quality materials and most advanced manufacturing techniques. The coil is filled with the latest lightweight resins strengthened with glass fibers and a chopped strand material for the best in shock resistance. The materials are “transparent” to the electromagnetic waves and provide perfect shielding. The coil is UV and waterproof and operates in a wide temperature range. The coil comes standard with coil cover.

Compared with the classic DD coils it has the following advantages:

  Ribbed housing, specially designed for absorbing the mechanical shocks and vibrations, made of special polymer, strengthened with glass fibers, injection-molded with very high pressure, with maximum UV protection. The coil keeps its perfect inductive balance in a very wide temperature range. Better ground balance, More Stable Operation, Better Sensitivity, More Accurate Target Identification, More Stable Ground And Better Overall Field Performance, Better pinpointing, Deeper detection depth.

These 21x17"  S.E.F Butterfly design search coils are produced for a wide variety of metal detectors:

21x17" SEF coil for Minelab E-TRAC/Safari/Explorer

21x17" SEF coil for Minelab Sovereign

21x17" SEF coil for Minelab Musketeer

21x17" SEF coil for Minelab SD/GPX series

21x17" SEF coil for DETECH Relic Striker