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Brand guide

Fisher metal detectors

We read 6 Fisher detectors: three F-series models for parks and fields, two Gold Bugs for gold, and the CZ-21 for the water. All but the CZ-21 run one frequency, from 7.69 to 71 kHz.

Specs read Oct. 16, 2026 on firsttexasproducts.comMade by First Texas Products

6Models on file
5-71 kHzPublished frequencies
2 yearsWarranty on every model

01

The Fisher models we read, range by range

All six come from First Texas Products' pages. The F22 listing we link names an 11-inch coil, where Fisher lists a 9-inch one. Open a card for the full spec sheet.

Showing all 6 models.

Multi-frequency1 model

Single frequency5 models

Gold BugSingle frequency

Gold Bug Pro

19 kHzFrequency
CoilWaterproof part
2.5 lbWeight
Coil
5-inch round DD

No listing found under this exact model number.

Facts from First Texas Products' product pages, read Oct. 16, 2026; weight bars share one scale, up to the heaviest detector on file. UnearthKit is an independent guide. It is not affiliated with, endorsed by, or sponsored by Minelab, Garrett, Nokta, XP, First Texas Products (Fisher, Teknetics, Bounty Hunter), or any other brand named on this site. Brand names are used only to identify products.

02

Which range fits what you hunt

Three groups, sorted by the facts that decide them: how much of the detector goes underwater, the technology, and the weight.

Parks and fields

Three F-series models. Both the F22 and F44 share 7.69 kHz and run on 2 x AA, rated for 30 hours at most. The F75 moves up to 13 kHz on an 11-inch BiAxial coil. Fisher lists 40 hours on 4 x AA (not included). It has the highest published weight of the three, at 3.5 lb.

  • F227.69 kHz
  • F447.69 kHz · 2.3 lb
  • F7513 kHz · 3.5 lb

Gold

Two Gold Bugs at very different frequencies. The Gold Bug Pro runs 19 kHz on a 5-inch DD coil and shows a 2-digit target ID. The Gold Bug 2 runs 71 kHz, with Normal, Audio Boost and Iron Discrimination modes and no target ID listed.

Underwater

The CZ-21 runs 5 and 15 kHz simultaneously and comes with waterproof headphones permanently attached. Its spec sheet lists both "fully submersible to 250 ft" and IP54. We cite both values. It weighs 5.69 lb.

  • CZ-215-15 kHz · 5.69 lb

03

Frequencies across the range

Each line marks the frequencies Fisher publishes for a model. Further right means a higher frequency, which favors small and low-conductive targets such as gold.

Published frequencies, model by model

F227.69 kHz
F447.69 kHz
F7513 kHz
Gold Bug Pro19 kHz
Gold Bug 271 kHz
CZ-21Dual frequency, 5 and 15 kHz simultaneously
Scale
1Multi-frequencySeveral frequencies at once: CZ
5Single frequencyOne frequency at a time: F-Series and Gold Bug

04

Guides with Fisher models

GuideGold metal detectors
BrandBounty Hunter metal detectors
BrandTeknetics metal detectors
GuideUnderwater metal detectors
GuideBest metal detectors for beginners
ExplainerCan a metal detector detect gold?

05

Questions about Fisher

First Texas Products, LLC, which also makes Bounty Hunter and Teknetics detectors. First Texas lists the USA as the country of origin for its detectors.

Only the CZ-21 is built for the water. On the F22, F75 and Gold Bugs, only the coil is waterproof. Fisher calls the F22 and F44 housing weatherproof, gives the F44 coil no rating, and says the F75 control box is not waterproof.

Both Gold Bugs. The Gold Bug 2 runs the highest frequency on file for Fisher, 71 kHz, with a 10-inch elliptical coil. The Gold Bug Pro runs 19 kHz and shows a 2-digit target ID. Our gold detector guide compares it with other brands.

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