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.
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.
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)