Fisher CZ21-8 Underwater Metal Detector

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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

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Metal Detector helpful Information

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


How does a detector find metallic items?

The metal detectors are provided with magnetic coils which are meant to have interaction with the metals that are near. Due to this fact, the instant you place the tool at the ground, an attraction between the coils within the detector and the metals available happens thus notifying you the area to have a look at. One of the most metals detected by way of the device include iron, copper, brass, aluminum, tin, lead, gold, silver, bronze, jewels, cash and plenty of others. A metal detector is a competent tool for finding buried metals considering that it help you discover various kinds of metals.
One crucial factor to remember even though is that there are extensive kinds of metal detector devices in the marketplace to choose from. So, what must you look for when on the lookout for a new detector?

The extent of sensitivity

The sensitivity levels within the detectors resolve the type of objects it’s going to be able to find in that space. A few metals require extremely sensitive units, and there are those who get attracted pretty easily. As an example, small metals like the jewels and even cash desire a detector that has a high level of sensitivity for the reason that it’s straightforward to find them especially if they are buried underground. However, for large items which might be hidden underground, using a low sensitive detector will paintings correctly for you because the items are easy to find. Additionally, it is recommended that you just purchase a sensor that has flexible, sensitive choices when you consider that you may are looking to use it in several stipulations and even spaces.


This is without doubt one of the best possible options that you simply must glance out for when buying the metal detector. This is because it makes your work straightforward when finding natural metals. A discrimination characteristic is utilized in finding the best metals through opting for the responses from the metals on the area that you are searching. Each and every metal has its reaction whilst attracted by way of a magnetic instrument and due to this fact, this feature allows you to recognize the kind of metal situated in that house through displaying the response at the machine. Notice that the cost of a detector with this selection is moderately prime. Additionally, when buying a detector with discrimination, check out the levels available in view that they vary in levels.

The fee

How much are you willing to spend on obtaining a new detector? Well, this will have to be the primary question you ask yourself before you head to the store to buy one. The latest detectors are supplied with completely different options, and the weather decide the price. Subsequently, if you wish to have a sensor that has all the above features, then it’s a must to be ready to spend a couple of extra bucks on the grounds that it will value you more versus obtaining easy detector.

The user

You might have considered trying a metal detector that can be utilized through all of the family especially while you go out hunting, camping or even climbing. Due to this fact, to ensure that everybody will be capable to use the detector conveniently consider buying an adjustable indicator that you can increase in length for higher use.

The area to make use of it

A few metal detectors are designed to be used in locations that would not have prime concentrated soils or spaces that don’t seem to be deep, at the same time as others are made with an adjustable mechanism which allows you to use it in several places. Therefore, if you understand that you will be the usage of the instrument in numerous spaces, imagine getting the adjustable one for simple use. Notice that an adjustable metal detector will value you extra as opposed to the straightforward one.

Other accessories

Each steel detector has to have an feature that notifies you whilst you get on the subject of the metals at the flooring. A few steel detectors are offered with headphones, and others are equipped with LED notifications at the LCD screens for the same goal.

The options to look for



Radar is the characteristic that is accountable for figuring out the sizes and the densities of the metals available at the ground. This selection is principally recommended for other folks engaged to find treasures or gold at the deep levels of the land.

The detection technology

The latest detectors are designed with totally different detecting generation, and therefore, you are looking to determine what you’re going to be looking out with the software sooner than shopping for it. The tactics are grouped into three classes that are the BFO, VLF, and PI.

BGO is the most simple era and detectors with this technology include approximately coils of the magnet. It is an ideal for looking for metals that are on the topsoil or hidden on other items.

VLF – This instrument is perfect for those who need to select positive metals from under the sand or dirt. It works by way of liberating frequency magnetic on the ground. Then while the magnet reaches to the bottom, it actions till it comes throughout a particular steel, and then reflects the instrument. You cans setup the VLF to mirror simplest whilst it comes into contact with the kind of metallic objects you are hunting for.

PI is a fine quality generation that’s answerable for finding the metals that are deep in the floor. The generation can also be set in some way that it’ll only pinpoint and alert you when it comes into contact with that metal. It’s mainly used by people who hunt for treasures or gold deep underground.