Fisher CZ21-8 Underwater Metal Detector

Affiliate Disclosure: We may earn commissions from purchases made through links in this post

Fisher CZ21-8 Underwater Metal Detector 35% Bounty Detector Detectors Eligible First For Garden Hunter Lawn Metal Monthly on patio Payments Products Save Texas to up

Fisher CZ21-8 Underwater Metal Detector

  • Saltwater or fresh water – submersible up to 250 feet – dual frequency fourier domain signal analysis
  • Touch-button., vco 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” and 10” Coil Options – Operating Frequency: 5 and 15 kHz
  • Recommended for: beach hunting, shallow water, lake /surf, diving

See User Reviews And Ratings On Amazon

Metal Detector Buying Guide

A metal detector is an electronic tool that is used for finding metallic objects in hidden places such as under the ground.


How does a detector find metallic objects?

The metal detectors are provided with magnetic coils which are supposed to interact with the metals that are near. Due to this fact, the instant you set the instrument on the ground, an attraction between the coils within the detector and the metals available happens thus notifying you the area to look at. One of the vital metals detected by way of the device include iron, copper, brass, aluminum, tin, lead, gold, silver, bronze, jewels, coins and many others. A metal detector is a reliable tool for locating buried metals considering that it let you find various kinds of metals.
One crucial thing to remember regardless that is that there are extensive types of metal detector devices on the market to choose between. So, what must you search for while in search of a new detector?

The extent of sensitivity

The sensitivity levels within the detectors determine the kind of metal it’s going to be capable to locate in that location. Some metals require extremely sensitive devices, and there are those that get attracted pretty easily. For instance, small metals just like the jewels and even cash need a detector that has a top stage of sensitivity since it’s straightforward to seek out them especially if they are buried underground. On the other hand, for large items that are hidden underground, the usage of a low delicate detector will paintings appropriately for you for the reason that items are easy to locate. Also, it is suggested that you simply buy a sensor that has versatile, sensitive choices because you may are looking to use it in numerous prerequisites or even areas.


This is likely one of the highest options that you just must look out for while buying the metal detector. This is because it makes your detecting activity simple when finding pure metals. A discrimination function is utilized in discovering the appropriate metals thru choosing the responses from the metals at the space that you are searching. Every mettalic object has its reaction when attracted by a magnetic instrument and due to this fact, this selection allows you to know the type of metal positioned in that space by way of showing the reaction at the system. Word that the price of a detector with this feature is reasonably prime. Also, when buying a detector with discrimination, take a look at the levels available due to the fact that they range in degrees.

The price

How a lot are you prepared to spend on obtaining a metal detector? Well, this must be the primary query you ask your self sooner than you head to the shop to buy one. The latest detectors are equipped with totally different options, and the elements decide the associated fee. Due to this fact, if you wish to have a sensor that has the entire above options, then it’s a must to be prepared to spend a few extra greenbacks in view that it’s going to cost you extra versus obtaining easy detector.

The user

You might have considered trying a metal detector that can be utilized via all of the family especially while you pass out looking, tenting and even hiking. Due to this fact, to make sure that everybody will be able to use the detector quite simply consider buying an adjustable indicator that you can building up in length for better use.

The area to use it

Some metal detectors are designed for use in locations that don’t have high concentrated soils or spaces that don’t seem to be deep, while others are made with an adjustable mechanism which lets you use it in numerous places. Due to this fact, if that you will be using the instrument in different spaces, consider getting the adjustable one for simple use. Notice that an adjustable metal detector will price you extra as opposed to the straightforward one.

Other equipment

Each steel detector has to have an feature that notifies you when you get with reference to the metals at the floor. Some steel detectors are bought with headphones, and others are supplied with LED notifications at the LCD monitors for a similar objective.

The options to search for



Radar is the characteristic that may be chargeable for determining the sizes and the densities of the metals to be had on the ground. This option is basically really useful for folks engaged find treasures or gold on the deep ranges of the land.

The detection technology

The metal detectors are designed with totally different detecting generation, and therefore, you wish to determine what you’re going to be looking with the tool sooner than shopping for it. The techniques are grouped into three categories which are the BFO, VLF, and PI.

BGO is the most straightforward technology and detectors with this generation encompass about two coils of the magnet. It is a perfect for looking for metals which might be at the topsoil or hidden on different items.

VLF – This tool is ideal for individuals who wish to pick out certain metals from under the sand or dirt. It really works via liberating frequency magnetic at the ground. Then while the magnet reaches to the ground, it movements till it comes across a specific metal, after which reflects the software. You cans setup the VLF to replicate simplest while it comes into contact with the kind of metal you are hunting for.

PI is a high-quality technology that’s responsible for finding the metals which might be deep within the ground. The technology may also be set in a way that it’s going to only pinpoint and provide you with a warning when it comes into touch with that metal. It’s principally utilized by people who hunt for treasures or gold deep underground.