Fisher Research Labs CZ-21 Quicksilver Premium Multi-Frequency Underwater Metal Detector

Rated 5.00 out of 5 based on 2 customer ratings

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Fisher Research Labs CZ-21 Quicksilver Premium Multi-Frequency Underwater Metal Detector with 8″ Searchcoil, Dual

VLF 5KHz and 15KHz Operating Frequency

Key Features

  • Frequency: VLF-Very Low Frequency
  • Detector Coil Size: 8″ Coil Supplied, All Detectors Coil Supplied
What’s in the box:
  • Fisher CZ-21 Quicksilver Premium Multi-Frequency Underwater Metal Detector
  • 8″ Searchcoil
  • Removable Control Housing
  • 4-9V Batteries
  • Fisher 2 Year Limited Warranty

Email when stock available


About Fisher Research Labs CZ-21 Quicksilver

Your CZ-21 QuickSilver is an all-purpose metal detector engineered for land, beach, salt and fresh-water treasure hunters.

Submersible to 250 feet.

3-Tone Target-ID
A low tone for iron, a mid-tone for pull tabs, foil and most gold rings and a high tone for U.S. coins, silver rings and some gold rings.

Patented Fourier domain signal analysis. Two deep-seeking, ground-compensating VLF signals (one at 5 KHz and one at 15 KHz) provide twice as much target information for accurate analysis and identification.

Two Search Modes
A silent running, slow motion Target-ID Mode and a hot, Auto-Tune Mode for All Metal searching.

V.C.O. No-Motion Pinpointing
Tap the pinpoint button and the audio tone increases in pitch and volume as the center of the coil approaches the target.

Big-Target Alert
The CZ-21 circuits may overload on large, shallow targets. A distinctive bell tone immediately warns you that the target is too large to identify.

Faint-Target Audio Boost
As you increase the volume level past “5”, strong target sounds remain at a fixed volume while faint, deep-target sounds continue to get louder.

Quick Manual Ground Balance
Tap the pinpoint button and lower the coil to the ground. Then set the ground control just below the audio tone and you are precisely tuned for on-site conditions.

Separately Sealed Battery Compartment
Protects the electronics from accidental flooding.

The CZ-21 comes with 8″ coil. All coils are permanently attached.

Balanced, Comfortable and hip-mountable
Cushioned armrest, soft foam grip and a control housing that slips off the handle and onto your belt.

Salt Water Compensation
Salt water is electrically conductive and therefore induces a strong signal in the searchcoil. Unlike most other metal detectors, the CZ-21 uses Fourier Domain signal analysis to cancel the salt water signal. Under most conditions you will not experience any false signals from salt water. When working in the surf zone at high sensitivity settings you may hear an occasional “whisper” which is easily ignored.

Just pick it up, set the control on the red circles and start searching in a “coins-only” mode. Or for maximum performance, adjust the controls for your own specific situation.

Fisher Research Labs CZ-21 Quicksilver Features

  • Saltwater or Fresh Water
  • Submersible Up to 250 feet
  • Dual Frequency Fourier Domain Signal Analysis
  • Touch-Button., V.C.O. no Motion, Precise Pinpointing
  • Easy Manual Ground Balance
  • High Performance in Mineralized Soil
  • All Metal Auto-Tune Mode
  • Large Target Alert / Faint Target Audio Boost
  • 3-Tone Audio Target-ID
  • Removable Control Housing for Belt-Mount
  • 8″ Coil
  • Fisher Research Labs CZ-21 Quicksilver Specifications

    Recommended for
    Beach Hunting
    Shallow Water, Lake /Surf, Diving
    Dual, VLF Search 5 KHz and 15 KHz
    Audio Target Response
    Iron I.D.: 200 Hz (Low tone)
    Foil and Tab I.D.: 450 Hz (Mid tone)
    Coin I.D.: 1 KHz (High tone)
    500 Hz – 1 KHz (VCO)
    500 Hz – 1 KHz (VCO)
    Operating Modes
    Autotune – VLF-Motion, all-metal with threshold tone
    Target I.D.: VLF-Slow Motion, Silent Search Discrimination
    Pinpoint: VLF, All-Metal, No Motion
    Search Coil: Type
    Concentric, Co-Planar
    Search Coil: Diameter
    8″ (20.32cm)
    Search Coil: Shielding
    100% ESI
    Search Coil: Interchangeable
    Waterproof, Piezo Electric
    Ground Balance
    Touch Pad, Manual or “Preset” Control Markings
    Hipmountable Control Housing
    Salt Water/Fresh Water Operation
    Land Operation
    To 250′ (76.20m)
    Extended: 50″ (127.00cm)
    Collapsed: 30″ (76.20cm)
    Control Housing: 2.8 lbs (1.27kg)
    Complete (with headset): 5.69 lbs (2.58kg)
    Handle and Search Coil: 2.43 lbs (1.10kg)

2 reviews for Fisher Research Labs CZ-21 Quicksilver Premium Multi-Frequency Underwater Metal Detector

  1. Rated 5 out of 5

    Tim N. Walker/Denver, CO

    Great Product and great customer services here on
    I’m verry verry satsified with my purchase

  2. Rated 5 out of 5

    James Bruxner/YORK PLAINS Australia

    The order arrived in 6 business days and also the orders department delivered with a low invoice, in this way I payed only 80$ on the customs office.

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