Best Underwater Metal Detectors

A submersible metal detector is not the most common type of detecting machine, and these are being used in very specific locations and times. If you are looking for the best underwater metal detector, you are at the right place.

There are many different types of metal detectors, and it all comes down to your preference and to what are you looking for.

When looking for the best underwater metal detector, there are multiple things you need to consider, such as performance in freshwater and in saltwater, water resistance, pulse induction, and operating frequency.

Let’s break down the top choices of underwater metal detectors.

What is the best underwater metal detector?

  1. Tesoro Sand Shark Underwater Metal Detector
  2. Fisher CZ21-8 Underwater Metal Detector
  3. Garrett AT PRO with Underwater Pinpointer
  4. Garrett ATX Deepseeker Metal Detector
  5. Fisher Pulse 8X Underwater Metal Detector

More detailed underwater metal detector reviews

This detailed guide on the top 5 underwater metal detectors are not just helpful, but also give a great insight on each product. This way you will easily see why did they make it to this list.

Tesoro Sand Shark Underwater Metal Detector

No wonder this bad boy made to the top of the list. It is one of the best underwater metal detectors and might be even the best one actually. It is the best you can get for your money, and it is simple to use. Tesoro is well known for the simple features, which are none less efficient than the ultra-modern models out there.  

This underwater metal detector is a pulse induction machine, which means you do not have to spend long hours with adjusting all the features and setting up all the ground balancing, but you can simply go and start searching right away. Pulse Induction deals with high mineralization so you can spend more time searching and less time adjusting all the modes.

The Sand Shark‘s depth capacity is a pretty impressive 200 feet, which makes it the best underwater metal detector.

As mentioned before, the Sand Shark is a pretty simple machine. This waterproof metal detector has two control modes, which are VCO and Normal. VCO stands for Voltage Controlled Oscillator. This mode increases in pitch and tone as you get closer to your targets. VCO is a very good mode for pinpointing the target, especially when you are searching in shifting tidal sands.

Normal all metal mode only increases in volume as you get closer to the target, but the tone will remain the same. Whichever you use as your setting is entirely up to and it only depends on your preference

You can control all of the above with a simple knob which is excellent to have on an underwater metal detector. Turn it up for greater sensitivity; this way you can see if you have found something bigger or multiple pieces scattered around. All the controls are on the simple, yet effective control panel. It is large and easy to use control box, which is equipped with a fast microprocessor for super fast re-setting. This way you do not have to wait long times and you can easily carry on with searching.

The Sand Shark submersible metal detector weighs 4.5 pounds and it measures 21.1 x 11.1 x 4.7 inches. To power it up you will need 8 AA batteries.

This is a very popular and highly recommended underwater metal detector. It is easy to use, has a few very effective features and will not leave you hanging.


  • Great depth and sensitivity
  • Pulse induction
  • Great price
  • Waterproof to 200 feet


  • Not great for discrimination on land

Fisher CZ21-8 Underwater Metal Detector

The Fisher CZ21-8 is a great submersible metal detector with a pulse induction which goes up to 250 feet deep.

If you are a scuba diver or you like to snorkel, this is a good option to consider. This underwater metal detector is good for hunting out the smallest targets in both saltwater and freshwater.

The control box is very easy to use and everyone can get the hang of it pretty fast. The control box has a volume control that can be used to boost up the audio on weaker signals, so you can get to deeper targets as well.

Fisher metal detectors are well known for their great settings. This underwater metal detector has a discrimination mode with seven settings to filter out metals. You can set the setting to your preferred metal or choose the all-metal option as well. The auto tone setting will use all metal mode with deep penetration but no discrimination.

The waterproof metal detector also has adjustable sensitivity. You can adjust the ground balance and tone the sensitivity. The higher the sensitivity the more signals you will get.

The waterproof metal detector is not the only thing you get in the package. There are waterproof headphones included so you can listen to the various tones. Low beep for iron, the medium tone for foil and small gold, and high tone beep for coins and jewelry.

The Fisher CZ2-8 submersible metal detector weighs 5.3 pounds, which is on the lighter weight in the underwater metal detector category, and measures 12 x 6 x 21 inches.

This underwater metal detector works well, simple to use and will get the job done without any trouble. It is heavier than most of the VLF machines, but it will ignore minerals and get deeper in the seabed. If you do not mind a little heavy lifting, this is a great option.


  • Easy to use
  • Adjustable Ground balance
  • Pulse Induction
  • Submersible up to 250 feet


  • Heavier than VLF machines
  • Not the best on land

Garrett AT PRO with an underwater pinpointer

If you are searching for a metal detector which is great both on land and in water, the Garrett AT PRO is an excellent choice. This waterproof metal detector offers a lot of great features and it is one of the best underwater metal detectors on the market.

The Garrett All-terrain PRO has a pretty large search coil and the detector is waterproof to ten feet. The great size and the accurate pinpointer make sure to catch all the smaller targets as well.

The submersible metal detector is equipped with a superb automatic and manual ground balancing which is essential to have in VLF machines to handle saltwater and a high volume of mineralization. The superfast recovery time ensures a more effective time spent on hunting, so you do not have to stick around the same place for a very long time.

The Garrett AT PRO works on a 15 kHz frequency, and it also features a 0-99 target scale ID to have a better idea about what is underneath. If you want to learn more about target scale ID check this article out. The continuous depth indicator will tell you how far to dig once you have located your target.

Moreover, the Garrett AT will tell you if its iron and trash, like cans or tins. This way you can save some serious time and spend more time on actual valuables.

The AT PRO is sold with the Garrett Carrot which is the ProPointer. It is a bright orange tool which is waterproof up to 10 feet as well. It is a handy tool to have because it will locate the exact position of your target. It works amazingly in moving tidal sands because it weighs only 6.5 pounds so you can easily hold onto it.

The Garrett AT PRO measures 21.3 x 14.4 x 8.7 inches and weighs only 3.03 pounds. It will power up with 4 AA batteries.

This is a great machine because it works well on both land and in water, however, you have to compromise with only a 10 feet submersible metal detector.


  • Large search coil
  • All-terrain metal detector
  • The Garrett Carrott is amazing
  • Large search coil


  • Less suitable for beginners

Garrett ATX Deepseeker Metal Detector

The Garrett ATX is also an exceptional Garrett metal detector. There are a few underwater metal detectors by this brand, and they thankfully tried to make various types. This submersible metal detector is based on pulse induction in opposite to the AT PRO which is a VLF machine. This metal detector works way better in salt water.

The ATX has a large 10 x 12 inches search coil which searches areas fast and effectively, but it will pick up on small signals as well, so you will not miss anything important. A great way to look through large places but still discover small items as well.

The large LCD screen is very simple with no added super tech features. The indicator will simply show you the signal strength of the target. It will also show your current setting, so if something is not working out for you, you will know what not to use. The panel is easy to use, especially since it has raised buttons. Those are great in water, so you can easily adjust them.

The ATX has a variety of metal discrimination modes, so you can easily focus on the best possible targets. You can also set it to an all metal mode to detect iron, coins, and jewelry as well.

There are also great automatic settings, so if you are the type of person who just wants to flick on the switches and already get to work, then this is a great underwater metal detector for you. Leave everything as default and the waterproof metal detector will do its job almost alone!

The ATX also features options like a quick iron check, also an auto function which will filter out interference. This way you can adjust the volume accordingly to your desired target, so you will be notified by deeper buried down items as well.

The Garrett ATX weighs 5 pounds and the size can be adjusted from 20 inches to 68 inches. It will power up with 8 AA rechargeable batteries.

This is one of the best underwater metal detectors on the market, and considering the price and the product, a pretty great option to consider. If you like simple features and easy to manage, this might be the one for you.


  • Waterproof up to 10 feet
  • Provides simultaneous detection
  • Multiple targets
  • Great sensitivity settings
  • Auto settings


  • Expensive
  • Pretty heavy

Fisher Pulse 8x Wet Underwater Metal Detector

As mentioned in previous reviews, the Fisher brand is a great one to choose. Their metal detectors are top notch and always take time to only include the best materials in the machines. If you are looking for an all over easy underwater metal detector which is super easy to use but works effectively, this is a great option to consider.

The Fisher Pulse 8X is a top choice metal detector for serious and knowledgable detectorists.

Yes, the price is up there, but when you want to get a very good metal detector, you have to understand that it is pricey. This type of waterproof metal detector is actually used by law enforcement, commercial drivers, and by the military. So it is actually an amazing metal detector.

The Pulse 8X has a heavy duty construction, but that is something you want when going on an underwater metal detector adventure. A less durable machine is not gonna last that long, and you will end up at the same place money-wise. It has a 6 feet detection range on land and in salt water as well, and that is a very nice range which is hard to beat.

The waterproof metal detector has a great sensitive pulse detector, but it is not highly affected by mineralized salt water or black sands. You can switch between low, medium or high in pinpointing so you can hunt down your chosen metals faster and better. It is very simple to use and these few features should be just about enough. You can set to various modes and levels, but all of those are made to make your life and experience easier.

A large visual readout and audio pings indicate targets and locations, so this way you will not miss out on anything. These features help you to identify coke cans and gold earrings without digging down. Also, these modes will show you all the possible treasures under rocks, sand, concrete corals, and waves.

Recently a new technological feature was added to metal detecting, so we do not only have underwater metal detector machines, but also waterproof headphones to go with them. These headphones block out background noises so you can only focus on detecting.

You can also change the search coil to a smaller or a larger size to fit it better to your needs. The Pulse 8X is also waterproof up to 200 feet, so it excellent for scuba drivers as well.

The Pulse 8X weighs only 4 pounds which is great for an underwater metal detector. You will need a rechargeable 9V battery which will last you all day long.

No wonder it has been rated the top underwater metal detector by the US Homeland Security. If you are on the hunt for an excellent waterproof metal detector and you have a little more to spend, this is a great underwater metal detector to consider.


  • 200 feet depth
  • Professional grade
  • Sensitive settings


  • Pricey
  • Not the best for land detection


Choosing the correct underwater metal detector can be stressful. There are so many great options on the market to consider. When looking for the best one for your needs, keep in mind all the possible factors.

Where and how will you be using your machine? There are various depths and sadly not all waterproof metal detector is great for underwater. There a few ones which are only good up to 10 feet, while some underwater metal detectors can even go as deep as 250 feet. Salt water and fresh water is also an important factor to consider. Some metal detector can act a bit funny in salt water, so make sure to think ahead.

Before you buy your underwater metal detector, decide if you would prefer a Pulse Induction machine or a Very Low-Frequency machine. You can read more about how to choose the best underwater metal detector here. Read the reviews and the complete detailed specs as well, because some of the features may not be waterproof. Many medium categories underwater metal detectors advertise as waterproof, however, the control box is not actually waterproof itself.

When you are breaking down your top choices of underwater metal detectors, also think about what is included in the package for the price. Some waterproof metal detector packs only include the metal detector, and some include super cool items like waterproof headphones, scoops, battery chargers and much more. Consider what are you getting for the price. Try to make the most out of your money, because this is a long term investment.

Hopefully, this detailed guide could help you with your decision when buying your underwater metal detector. Keep in mind all the great features, the packages and also do not forget to consider your own factors. You will find the best waterproof metal detector for your needs in no time.