Narrower coil width means less soil in the detection field

Complete Flexibility - Choose from powerful single frequencies or select a simultaneous multi-frequency mode to achieve excellent detection on all targets in all soils or sands

Coil: 7-inch stock concentric

11" DD elliptical waterproof search coil for deep penetration

Ultra-High Frequency Performance in Mineralized Gold Country

Fisher F11 Metal Detector grass knife Narrower coil width means lessThe Fisher F11 Metal Detector is a turn on and go VLF machine built around the same 7. 69 kHz platform that put the Fisher F Series on detectorists' belts for more than a decade. Operating at 2. 3 pounds with a 7 inch concentric elliptical waterproof coil and three preset hunt modes, the F11 is the first rung of Fisher's modern hobby lineup, and the lightest, simplest entry point into the entire Fisher metal detector lineup. We carry it for first time