Garrett 9 x 12 in Coil Cover for ACE and AT 9x12 PROformance Concentric Coils

This cover fits the Garrett ACE 9 x 12 in PROformance concentric searchcoil (PN 2221900), so what matters is the coil on your detector, not the ACE model. Garrett lists that coil as compatible with the ACE 100, 150, 200, 200i, 250, 300, 300i, 350, EuroACE, 400 and 400i. It does not fit the coil that comes standard on the ACE 300 (7 x 10 in concentric) or ACE 400 (8.5 x 11 in DD), and the 9x12 coil does not work on the ACE Apex. Find covers and coils for your detector in our Garrett metal detectors collection.

To install the cover on the ACE 9 x 12 in coil, seat the front of the coil into the cover first, then press the back end down until the cover sits evenly around the whole edge. Garrett designs this cover to form fit the coil, so it should sit snug with no gaps. Clean and dry the coil before fitting it, because sand trapped under the cover wears the coil housing. If the cover will not seat, check that your coil is the 9 x 12 in size and not the stock 7 x 10 in or 8.5 x 11 in coil. Covers for other sizes are in our metal detector parts and accessories collection.

Garrett makes this cover to stay on the ACE 9 x 12 in PROformance coil while you detect, and ships one in the box with that coil. Garrett does not publish depth figures with and without the cover. In practice, the thing to watch is dirt or sand packed between the cover and the coil, which can cause erratic signals, so clean it out regularly. See the coil sizes that fit the ACE in our metal detector search coils collection.

This coil cover is designed to protect your search coil from scratches and scuffs during field use, including beach detecting. Use the cover to guard the coil from sand abrasion during dry-beach and wet-sand hunts. After beach hunts, rinse the cover with fresh water to flush salt and grit from the material. The cover helps extend coil life by preventing wear from repeated ground contact in sandy environments. For tips on maintaining your detector in coastal environments, see our metal detecting tips and FAQs page.

Cover lifespan depends on hunt frequency and terrain. Detectorists hunting regularly in parks and fields will see gradual wear as the material thins and develops small tears from repeated ground contact. Rocky sites and gravel paths accelerate wear, while manicured lawns and beaches are gentler on the material. Inspect the cover after each hunt for punctures or edge separation. A torn cover still provides some protection, but exposed sections allow dirt and moisture to reach the coil housing. Replace the cover when damage becomes extensive or when it no longer holds securely against the coil during use.

Remove the cover before storing your ACE detector for extended periods. Peel the cover off, rinse both the cover and coil with fresh water, and let them air-dry separately before storage. Store the cover flat or loosely rolled to prevent permanent creases in the material. Reattach the cover before your next hunt to ensure the coil is protected from the first sweep. Proper storage practices help maintain both the cover and your detector's search coil in good condition between detecting sessions, extending the useful life of both components.

A coil cover is a practical accessory for any ACE detectorist, especially beginners who may not realize how quickly unprotected coils wear in the field. Pairing a cover with other low-cost essentials like a finds pouch or digging tool makes a thoughtful starter package. The cover is affordable enough to include in a gift bundle without inflating the total cost, and it extends the life of the detector's most vulnerable component. Browse more budget-friendly detecting gear in our holiday gifts under $20 collection.