Fisher F11 Metal Detector

The 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 detectorists, kids old enough to swing for a full afternoon, and experienced hunters who want a reliable backup machine that lives in the truck or the camper.

Why Detectorists Choose the Fisher F11

• 2.3 pound operational weight that lets a beginner hunt all day, and lets a kid actually finish a session at the park or beach without complaint.
• Preset Jewelry, Coin, and Artifact modes that take the guesswork out of discrimination on day one, with notch by category to silence iron and foil.
• 9-segment visual target ID paired with 4-tone audio so a target gets identified twice, on the screen and in the headphones, before we put a digger in the ground.
• Static pinpoint with a 6-segment depth bar that pulls a target into a tight X faster than swinging in motion mode, especially for shallow coins and small jewelry.
• 20 to 25 hours of run time on a single 9V alkaline, which is roughly four full Saturdays of detecting before we swap a battery.
• 7-inch waterproof concentric coil that handles rinse-down at the dry-sand line and tight separation in trashy parks where a larger coil would mask good signals.

What's in the Box

• Fisher F11 control pod with adjustable S-rod shaft
• 7-inch concentric elliptical waterproof search coil
• 9-volt alkaline battery
• Owner's manual
• Manufacturer warranty registration

Field Use Across Real Hunt Types

Park and Schoolyard Coin Shooting

Trashy turf is where the F11 earns its keep. The 7-inch concentric coil keeps the detection footprint narrow enough to separate a clad dime from a pull-tab two inches away, and the Coin mode preset already has the discrimination set up to ignore most iron and foil before we touch a knob. We start in Coin mode, run sensitivity at 4 of 6, and slow the sweep down in heavy-target areas so the audio has time to recover between adjacent signals.

• Search Mode: Coin
• Sensitivity: 4 of 6 (drop to 3 near power lines or chain-link fencing)
• Volume: 4 of 6
• Coil: 7-inch stock concentric

For first-timers, we recommend reading our beginner detector guide before the first hunt, then sticking with parks until the audio tones become second nature.

Tot Lots and Sand Volleyball Courts

Dry sand and wood-chip play areas are forgiving ground, and they hide a steady supply of dropped coins, rings, and earrings. The F11's preset Jewelry mode opens up the lower conductors where most modern rings live, while the static pinpoint gets us on top of a target before we sift. The waterproof coil handles a quick rinse with a water bottle when sand wedges into the ear of the coil.

• Search Mode: Jewelry
• Sensitivity: 5 of 6
• Volume: 5 of 6
• Coil: 7-inch stock concentric

Old Homesteads and Light Relic Sites

On dry, lightly mineralized homestead soil, Artifact mode opens up the iron ranges that Coin mode silences. We give up some target ID precision in exchange for hearing the bent square nails and brass furniture parts that point to a productive corner of the lot. The fixed ground balance is a real limitation in heavily mineralized red dirt, so we save the F11 for sandy and loamy sites and reach for a ground-balanced machine for serious red-dirt relic work.

• Search Mode: Artifact
• Sensitivity: 3 of 6 (raise to 4 in clean ground)
• Volume: 4 of 6
• Coil: 7-inch stock concentric, or 11-inch DD for wider ground coverage

Technology That Matters on This Detector

7.69 kHz VLF Single Frequency

The F11 runs a single VLF frequency at 7.69 kHz, which is the proven middle-ground frequency for general coin, jewelry, and light relic work. Higher frequencies favor small gold and tiny targets but get noisy in trashy ground, and lower frequencies favor deep silver but quiet down on small jewelry. 7.69 kHz hits the meaty middle, which is exactly what we want in a detector whose primary job is to teach a new detectorist to read targets.

4-Tone Audio With Notch Discrimination

Four discrete tones (bass, low, medium, high) map cleanly to the 9-segment target categories on the LCD. Iron drops into bass, foil and small gold sit in the low range, nickels and pull-tabs hold the medium tones, and zinc and copper coins ride the high tone. Notch lets us mute any single category we are tired of digging without losing the rest of the spectrum, which is the difference between an enjoyable park hunt and a frustrating one.

Build Quality and Ergonomics

Shaft and Balance

The F11 uses an S-rod shaft that adjusts from 41 to 51 inches, which fits a 9-year-old at the short setting and a 6-foot-3 adult at full extension. The padded grip and adjustable armrest keep the wrist neutral over a long session, and the 2.3-pound total weight is light enough that our team has handed this machine to detectorists in their seventies without hearing a complaint about fatigue.

Controls and Display

Five face buttons, no menus, no submenus. Power, mode, sensitivity, pinpoint, and notch are the entire interface. The LCD is not backlit, so the F11 is a daylight detector by design, and the control pod is not weatherproof, so we run an aftermarket rain cover when the forecast looks unsettled.

Battery

One 9-volt alkaline runs the F11 for 20 to 25 hours of continuous detecting time. Lithium 9V batteries push that closer to the upper end of the range, and rechargeable 9V cells work at the cost of shorter run time per charge. There is no internal rechargeable pack to wear out.

Coil Options

Stock 7-inch Waterproof Concentric

The included 7-inch elliptical concentric coil is purpose-built for trashy ground and tight separation. The concentric winding gives a sharper target response than a DD coil at the cost of some depth, which is the right tradeoff in a beginner machine that will spend most of its life in parks and schoolyards.

Optional 11-inch DD Upgrade

For open ground, beach hunts, and light relic sites, the 11-inch DD elliptical waterproof coil drops onto the F11 lower rod and adds noticeable depth and ground coverage per swing. The DD pattern handles mineralized ground better than the stock concentric, and the larger footprint cuts the time it takes to clear a homestead lot in half.

Fisher F11 Metal Detector Specifications

All values below are taken directly from Fisher Research Labs' official product specifications. We do not list a spec on this page until we have confirmed it from the manufacturer.

• Operating principle: VLF single frequency
• Frequency: 7.69 kHz
• Operating modes: 3 (Jewelry, Coin, Artifact)
• Target ID: 9-segment visual category icons
• Audio: 4-tone (bass, low, medium, high)
• Discrimination: Adjustable, notch by category
• Sensitivity: Adjustable, 1 to 6 levels
• Volume: Adjustable, 0 to 6 levels
• Pinpoint: Static push-and-hold with 6-segment depth bar
• Ground balance: Preset (factory fixed)
• Search coil: 7-inch concentric elliptical, waterproof
• Coil interchangeable: Yes
• Headphone jack: 1/4 inch
• Shaft length: 41 to 51 inches, S-rod
• Operational weight: 2.3 lbs (1.04 kg)
• Battery: 1 x 9-volt
• Battery life: 20 to 25 hours
• Backlight: No
• Weatherproof rating: Coil waterproof, control box not weatherproof, no IP rating
• Warranty: 2-year limited manufacturer warranty

Why Buy the Fisher F11 Metal Detector from Serious Detecting

Serious Detecting is an authorized Fisher dealer, which means every F11 we ship is brand new, registered for the full manufacturer warranty, and supported directly by Fisher Research Labs for parts and service. Our team detects with these machines, so when a customer calls with a sensitivity question or a coil compatibility question, we answer from field experience, not a spec sheet. We back the F11 with free U.S. shipping, a 30-day return window, and a price match guarantee on any authorized U.S. dealer's advertised price. If a detectorist outgrows the F11 inside the first season, the next step up in the same family is the Fisher F22, which adds weather resistance and a wider target ID range.