36% Off

Fisher Research Labs CZ-21 Quicksilver Premium Multi-Frequency Underwater Metal Detector with 8" Searchcoil, Dual VLF 5KHz and 15KHz Operating Frequency

SKU: FHCZ218 MFR: CZ21-8
Earn VIP Reward Points

Key Features

  • Discover treasures with the CZ-21 underwater metal detector, submersible up to 250 feet!
  • Dual VLF frequency (5kHz & 15kHz) metal detector enhances target identification in any terrain.
  • Pinpoint function quickly locates targets; the autotune feature provides VCO audio feedback.
  • Discrimination control helps filter out unwanted metals, focusing your search on valuable finds.
  • This lightweight metal detector is ideal for beach hunting and shallow water treasure recovery.
  • Enjoy long-lasting performance with excellent battery life for extended metal detecting sessions.
See More Product Details
Special Order?Estimated to Ship: 08/13/2025
Free Shipping

See Options

Qty
1

Protect your gear with Adorama Protect.* Learn more

1 Year

$99.99

2 Year

$149.99

3 Year

$199.99

Available to U.S. customers only.

Need help? Ask our experts.

Overview
Compare
Accessories
Specs
Protection
Q&A

Questions & Answers

Reviews about this item

Review Summary

Select a plan in the Add Protection section above and purchase with this product by clicking “Add to Cart”.

image-protection

TRUSTED PROTECTION PLANS, EXCEPTIONAL SERVICE.

Invest In Your Gear and Peace Of Mind!

Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.

Repair or Replacement

Repair or Replacement

If we can’t fix it, we’ll replace it at no additional cost.

Accidental Damage

Accidental Damage

Protect your product from drops, spills, and more.

Peace of Mind

Peace of Mind

Enjoy your gear without fear. We have you covered!

Failure Protection

Failure Protection

When regular use of your product over time results in mechanical or electrical failure.

Zero Deductible

Zero Deductible

We will never charge you a deductible after the purchase of a plan.

Customer-Focused Support

Customer-Focused Support

Our claims process is simple & easy and our customer service team is happy to help.

Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500

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

    8" (20.32cm)

  • 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

    To 250' (76.20m)

  • Length

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

  • Weight

    Control Housing: 2.8 lbs (1.27kg)
    Complete (with headset): 5.69 lbs (2.58kg)
    Handle and Search Coil: 2.43 lbs (1.10kg)

3 Accessories for Fisher Research Labs CZ-21 Quicksilver Premium Multi-Frequency Underwater Metal Detector with 8" Searchcoil, Dual VLF 5KHz and 15KHz Operating Frequency

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

About Fisher Research Labs CZ-21 Quicksilver

Explore the depths with the CZ-21 QuickSilver Premium Multi-Frequency Underwater Metal Detector, a versatile tool designed for both land and underwater treasure hunting. This high-performance metal detector is submersible up to 250 feet, making it an ideal choice for beach, salt, and freshwater explorations.

The CZ-21 QuickSilver is equipped with an 8" searchcoil and operates on dual VLF signals at 5KHz and 15KHz frequencies. These frequencies provide twice the target information, ensuring accurate analysis and identification of your finds. Its patented Fourier domain signal analysis further enhances depth detection, allowing you to uncover hidden treasures buried deep below the surface.

This underwater metal detector features a 3-Tone Target-ID system, offering 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 certain gold rings. This system simplifies your search by categorizing detected metals based on their tones.

The CZ-21 QuickSilver offers two search modes: a silent, slow-motion Target-ID Mode and a dynamic Auto-Tune Mode for All Metal searching. Its V.C.O. No-Motion Pinpointing feature increases the audio tone's pitch and volume as the coil approaches the target, ensuring precise detection.

The device also features a Big-Target Alert that warns you of large, shallow targets that may overload the circuits. Its Faint-Target Audio Boost increases the volume of deep, faint target sounds, enhancing your detection capabilities.

The CZ-21 QuickSilver is designed for ease of use and comfort. It features a cushioned armrest, a soft foam grip, and a control housing that can be detached from the handle and mounted on your belt. The device also includes a separately sealed battery compartment for added protection against accidental flooding.

This metal detector also boasts a Salt Water Compensation feature, using Fourier Domain signal analysis to cancel out false signals from electrically conductive salt water. This ensures a smooth and uninterrupted search, even in the surf zone at high sensitivity settings.

Whether you're a seasoned treasure hunter or a beginner, the CZ-21 QuickSilver Premium Multi-Frequency Underwater Metal Detector offers a user-friendly experience. Simply set the control on the red circles for a "coins-only" mode, or adjust the controls to suit your specific situation and start your treasure hunting adventure.

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

Key Features

  • Discover treasures with the CZ-21 underwater metal detector, submersible up to 250 feet!
  • Dual VLF frequency (5kHz & 15kHz) metal detector enhances target identification in any terrain.
  • Pinpoint function quickly locates targets; the autotune feature provides VCO audio feedback.
  • Discrimination control helps filter out unwanted metals, focusing your search on valuable finds.
  • This lightweight metal detector is ideal for beach hunting and shallow water treasure recovery.
  • Enjoy long-lasting performance with excellent battery life for extended metal detecting sessions.

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