Metal Detector Coils Explained

DD (Double-D) Coils: - Two overlapping D-shaped windings - Best ground coverage per sweep - Better stability in mineralization - Standard on most modern detectors

Concentric Coils: - Inner and outer circular windings - Cone-shaped detection field - More precise pinpointing - Can struggle in bad ground

Monoloop Coils: - Single winding - Used mainly on PI detectors - Maximum depth - Wide detection field

Small Coils (5-8"): - Better target separation - Works in tight spaces - Faster sweep speed - Less depth

Medium Coils (9-11"): - Best all-around size - Good depth and coverage - Standard equipment on most detectors

Large Coils (12"+): - Maximum depth - More ground coverage - Heavier and slower - Best for open fields

Elliptical Coils: - Easier to maneuver - Good for trashy areas - Popular mid-size option

Spider/Open Coils: - Reduced weight - Works through vegetation - Some depth sacrifice

Imaging Coils: - Multiple winding array - Better target separation - Premium option for top detectors

Match Coil to Conditions: - Parks with trash: Small DD - Open fields: Large DD - Beach water hunting: Medium DD - Tight between rocks: Small concentric

Upgrade Considerations: - Stock coils are usually good - Large coil = more depth - Small coil = more separation - Aftermarket options expand capabilities

Care: - Use coil covers always - Check connection periodically - Store flat or hanging - Avoid extreme temperatures