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Fisher Research Labs CZ-21 Quicksilver Premium Multi-Frequency Underwater Metal Detector with Concentric 10.5" Searchcoil, Dual VLF 5 KHz and 15 KHz Operating Frequency

SKU: FHCZ2110 MFR: CZ21-10
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Key Features

  • Uncover hidden treasures with the CZ-21 metal detector, perfect for beach hunting.
  • Experience superior pinpoint accuracy with dual VLF frequencies at 5 kHz & 15 kHz.
  • Explore depths up to 250' with this fully submersible underwater metal detector.
  • Enjoy versatile metal detection on land or in salt & fresh water environments.
  • Customize ground balance with the manual touch pad for optimal performance.
  • Benefit from excellent discrimination control to filter out unwanted metals.
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Special Order?Estimated to Ship: 09/10/2025
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Fisher Research Labs CZ-21 Quicksilver Specifications

  • Recommended for

    Beach Hunting
    Shallow Water, Lake /Surf, Diving

  • Frequency

    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)

  • Autotune

    500 Hz - 1 KHz (VCO)

  • Pinpoint

    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

    10.5" (26.67cm)

  • Search Coil: Shielding

    100% ESI

  • Search Coil: Interchangeable

    No

  • Headset

    Waterproof, Piezo Electric

  • Interchangeable

    No

  • Ground Balance

    Touch Pad, Manual or "Preset" Control Markings

  • Hipmountable Control Housing

    Yes

  • Salt Water/Fresh Water Operation

    Yes

  • Land Operation

    Yes

  • Submersible

    Up to 250' (76.20m)

  • Length

    Extended: 50" (127.00cm)
    Collapsed: 30" (76.20cm)

  • Weight

    Control Housing: 2.8 lbs (1.27kg)
    Complete (with headset): 6.06 lbs (2.75kg)
    Handle and Search Coil: 2.80 lbs (1.27kg)

3 Accessories for Fisher Research Labs CZ-21 Quicksilver Premium Multi-Frequency Underwater Metal Detector with Concentric 10.5" Searchcoil, Dual VLF 5 KHz and 15 KHz Operating Frequency

  • All Accessories (3)
  • Batteries & Power Supply (1)Required Item
  • Metal Detector Accessories (2)

About Fisher Research Labs CZ-21 Quicksilver

Because you demand precision and sophistication in your treasure hunting endeavors, the CZ-21 Quicksilver Premium Multi-Frequency Underwater Metal Detector is your ideal companion. This advanced, high-tech device is engineered for a variety of environments, including land, beach, and both salt and fresh water. Its innovative design is leak-proof and submersible up to 250 feet, making it a state-of-the-art tool for underwater metal detection.

The CZ-21 Quicksilver is equipped with a large, concentric 10.5" searchcoil, allowing for greater depth and coverage in detecting metal objects. It operates on dual VLF frequencies of 5 KHz and 15 KHz, ensuring the detection of a wide range of metal objects, from coins and jewelry to historical relics.

This sophisticated metal detector features a 3-Tone Target-ID system, providing 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. Its patented Fourier domain signal analysis and two deep-seeking, ground-compensating VLF signals provide twice as much target information for accurate analysis and identification.

The CZ-21 Quicksilver offers two search modes: a silent running, slow motion Target-ID Mode and a hot, Auto-Tune Mode for All Metal searching. Its V.C.O. No-Motion Pinpointing system increases the audio tone in pitch and volume as the center of the coil approaches the target, ensuring precise detection.

This innovative metal detector also features a Quick Manual Ground Balance for precise tuning to on-site conditions, a separately sealed battery compartment for added protection, and a comfortable, balanced design that can be hip-mounted for ease of use. Its Salt Water Compensation feature uses Fourier Domain signal analysis to cancel the salt water signal, eliminating false signals from salt water.

Whether you're a seasoned treasure hunter or a beginner, the CZ-21 Quicksilver Premium Multi-Frequency Underwater Metal Detector is designed to enhance your metal detecting experience with its advanced features and high-tech design.

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
  • 10" Coil

Key Features

  • Uncover hidden treasures with the CZ-21 metal detector, perfect for beach hunting.
  • Experience superior pinpoint accuracy with dual VLF frequencies at 5 kHz & 15 kHz.
  • Explore depths up to 250' with this fully submersible underwater metal detector.
  • Enjoy versatile metal detection on land or in salt & fresh water environments.
  • Customize ground balance with the manual touch pad for optimal performance.
  • Benefit from excellent discrimination control to filter out unwanted metals.

What's in the box:

  • Fisher CZ-21 Quicksilver Premium Multi-Frequency Underwater Metal Detector
  • 10 " Searchcoil
  • Removable Control Housing
  • 4-9V Batteries
  • Fisher 2 Year Limited Warranty