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6 Best Underwater Metal Detectors 2020 – Reviews & Buying Guide

An underwater metal detector is an indispensable tool for people who enjoy hidden treasure hunting, especially in rivers, lakes, and oceans.

But to find the best underwater metal detector for your needs, you should understand the different types there are available, and their pros and cons, so that you can be sure that you are making the best choice and investment possible.

It makes a difference whether you are planning to hunt for treasures at a riverside, on the seashore, or want to use the underwater metal detector when diving.

Where will you be using your underwater metal detector?

Some water detectors are water-resistant, or weatherproof, and can be used in shallow waters safely. Others are waterproof and can be completely submerged and used underwater, which makes them suitable for diving and for treasure hunting in deep waters.

So, it is essential to pick the best underwater metal detector which will do the job of detecting metals in the type of water and settings that you will be using it.

For shallow water use, you may even opt for a land metal detector that has a waterproof coil.

But for hunting and use in lakes, rivers, and creeks, then you should definitely opt for a submersible waterproof metal detector, in order to keep it safe and working, even if it happens to end up underwater completely.

There are underwater metal detectors that are suitable for saltwater diving and use too.

And some models are designed specifically for use while scuba diving.

Last but not least, you should think about whether you want the metal detector to be as efficient and useful when used on land as well as in water, before purchasing one.

What type of metal detector do you need?

Apart from the type and depth of the water, you will be using your metal detector in, you should also consider which type of underwater metal detector will be more suitable for your needs.

There are two common types of metal detectors – VLF and Pulse Induction.

In general, a Very Low Frequency (VLF) detector is a better choice if you are looking for a less expensive option that works better in places and water with lower mineralization, such as freshwater sources. This is the lower sensitivity type of metal detector and is suitable for land and freshwater use by hobbyists.

The main advantage of the VLF underwater metal detectors is that they are more sensitive to jewelry, coins, and other precious metals, so you will not waste time digging up junk and old tin cans.

The Pulse Induction Technology type is the higher-end type of metal detector. They perform better if you want to use them for scuba diving or for other saltwater uses. In general, a PI metal detector is not affected by the heavy mineralization of saltwater and the sand on the beach and it can find metal objects which are deeper under the ground.

The possible downside of the Pulse Induction metal detectors is that they do not discriminate the type of metal detected, so you may have to do quite a lot of digging until you get to a worthy find.

We have added the best VLF detectors and the best pulse induction detectors for use in and under water for you.

Other factors to consider when buying the best metal detector for underwater use

Other factors you should keep in mind when shopping for the best underwater metal detector include your budget range, the accessories which you will need alongside the detector, as well as your experience level.

Here are the top best underwater metal detectors for 2020, which you can pick from. We have added different types of products for different needs, experience levels, uses, and budgets.

Underwater metal detector

Garrett 1140900 Pro-Pointer AT Waterproof Pinpointing Metal Detector

The Garrett Pro-Pointer AT is one of the best compact handheld waterproof pinpointing metal detectors you can find in 2020.

The metal detecting underwater tool is reasonably priced and is completely submergible and waterproof to 20 feet.

The gadget is orange colored for better visibility in deep murky waters, and also has a built-in LED flashlight to use it in low light conditions.

The nifty waterproof underwater pinpointer metal detector has molded centimeter and inch rulers on the side, so you can easily determine the depth of the target.

It has an easy to adjust sensitivity level feature, and you can choose between the 3 available sensitivity levels, in order to narrow down your search and findings of tiny objects, gold nuggets, and other treasures.

The tool also has a fast retune quick button which you can press to make it capable of bigger larger targets or to tune out ground mineralization of wet sand and saltwater. You can also use this nifty feature to locate the borders of your eventual target and to measure the distance and size of your potential find.

You can also set this reasonably priced device to help pinpoint several smaller targets or one larger one.

The Pro-Pointer At has a lost alarm which will chirp for 60 minutes, and an auto power-off function after 5 minutes of use without any buttons being pressed for battery saving and for prolonging the battery life.

You can also use it in silent stealth mode when it vibrates only.

The device has a molded lanyard attachment loop, and also comes with a sturdy woven holster for your belt, and a 9-volt battery.

This underwater metal detector is suitable for all types of uses, in salt water, and on land.

It has a special pinpointing tip and offers a wide 360-degree detection area. It will operate in temperatures from -4 to 130 degrees Fahrenheit.

The Pro-Pointer At weighs a mere 6.5 ounces and is sold with a 2-year limited warranty and is another one of the best underwater metal detectors for 2020.

Garrett AT Pro Metal Detector: Garden & Outdoor 

If you are shopping for a more universal metal detector, then you should consider buying the Garrett AT Pro. It is a mid-range, VLF metal detector which can be used on land, turf, in rivers, creeks, and in salt water too.

The device has a fully submersible search coil to a depth of up to 10 feet, and is suitable for just about any type of metal hunting, possibly excluding diving. The DD search coil is 8.5 x 11 inches, and you can use it in salt water and freshwater, as well as on all types of terrains. The length of the detector can be adjusted from 43 to 46 inches. Its weight is 3.03 lbs.

It is a reasonably priced metal detector underwater suitable for beginners and for enthusiasts.

The Garrett AT Pro comes with high-quality land MS-2 padded headphones with volume control, but you can purchase waterproof ones if you are worried about getting them wet.

The machine has a 15kHz operating frequency, which will allow you to detect even the smallest precious metal items, and it has rapid recovery time and a manual ground balance, which makes it easy to use and efficient on all types of grounds.

Thanks to its pro mode audio feedback features, including Tone Roll, and Proportional Audio, you can distinguish the subtle sound changes in the audio signals easily to determine the search depth, dimensions, and shape, as well as the conductivity of your target. You can also set the search modes of this metal detector to hear and easily distinguish the discriminated iron objects, and thus save time and effort from having to dig up trash items and junk targets.

The Garrett AT Pro has a useful digital target ID, which has a scale from 0 to 99 and will help you determine the conductivity of the metal detected.

It also has a non-motion All-Metal Mode for the exact detection of the position of the target and the target depth.

It offers 6 search modes, including 3 standard and 3 pro, and has 8 depth and sensitivity adjustment settings.

It works with 4 AA batteries and comes with a 2-year warranty by Garrett.

Overall, the Garret AT Pro is an all-terrain metal detector is suitable for jewelry, gold nugget, coin, relic, cache, ghost town, beach hunting, and other events and competitions on the beach or around and in shallow freshwater.

Garrett Sea Hunter MK-II Metal Detector

If you want to buy an efficient metal detector for diving, then this pulse induction detector by Garret could be the most suitable option that is currently available on the market.

The Garret Sea Hunter MK-II is fully waterproof and can be used during scuba diving to a depth of up to 200 feet.

It comes with waterproof submergible headphones and has excellent sensitivity.

The Sea Hunter Mark II has an efficient automatic salt elimination feature.

You can mount this metal detector waterproof tool on your hip for comfortable use during walking, swimming, or diving. It also comes with straps for wet suits.

The underwater metal detector for divers has two discrimination function modes, including the patented Discrete Trash Elimination mode, so you can ignore trash and focus on the real treasures, with a great ability to detect coins and gold nuggets.

You can choose between All Metal, Non-Motion, and Standard PI Discrimination mode.

The Pulse Induction technology of the Mark II detector has 22 frequencies, which are perfect for use while diving and hunting wrecks underwater.

Its search coil is 8 inches, and the length is adjustable from 28 to 52 inches. The total weight of the Sea Hunter MK-II is 5.1 lbs., and it is powered by 8 AA batteries.

The Mark II Pulse Induction detector comes with a 1-year warranty.

Even though it lacks a pinpoint mode or visual identification, this sturdy and efficient underwater metal detector is one of the best deals if you are on the market for a PI underwater metal detector for diving.

Fisher 1280-X Aquanaut Metal Detector with 10inch Search Coil 


The Fisher 1280-X Aquanaut Metal Detector is one of the best VLF underwater metal detectors for diving as well as for beach hunting.

It comes with submersible headphones and can be used in water, and has a depth rating of up to 250 feet deep which makes it perfect for scuba diving.

This waterproof metal detector is easy and efficient to use on land, in salt and in freshwater, thanks to its turn-and-go function and its sensitivity adjustment.

It has a nifty target strength LED and offers VF discrimination function so you can tell the real treasure from the trash buried in the ground. The very low frequency of 2.4kHz can be more susceptible to the mineralization of wet sand, but it has an efficient manual ground balance as well as trash and mineralization discrimination features.

The detector has a very long battery life and can be used for up to 75 hours per charge, which is more than most other underwater metal detectors on this list.

The Fisher 1280-X Aquanaut underwater detector has a patented quartz-crystal circuitry that helps discriminate and ignore small pieces of junk such as bottle caps and other trash targets. This is another feature that makes this excellent underwater metal detector unique and ranks it among the best underwater metal detectors.

You can wear it mounted on your belt or strapped to your wet suit with the included straps and belt mount. The unit weighs 5.5lbs. and comes with a 10 inch round concentric coil, with an adjustable length.

It provides deeper operating depth as compared to other VLF metal detectors and is an excellent, long-lasting, and efficient treasure hunting tool to use while diving or swimming in saltwater or freshwater, as well as on land too.

Minelab SDC 2300 All Terrain Gold Detector

The Minelab SDC 2300 All-terrain gold detector is a Pulse Induction Technology detector that can be submerged in fresh and saltwater to 10 feet in depth.

This metal detector for gold is foldable to a size of just 8.5 x 15.7 inches, so you can carry it in your backpack easily. When unfolded and ready for use, the size of the Minelab SDC 2300 is 59 x 9.5 x 2 inches, and it weighs 5.1 lbs.

You can use this gold metal detector on land and in shallow water on shorelines and riverbeds to detect gold nuggets, jewelry, and other treasures.

The tool has a military-grade, rugged construction that will endure a lot of wear and tear and which requires no assembly.

One of the best underwater metal detectors and pulse induction detectors can work in all types of terrains and weather conditions without fail.

This tool is an excellent choice for patch hunting, as you can search remote and hard to reach areas with it efficiently for gold deposits and items.

It is sold with rechargeable batteries, a charger, and headphones.

You will also receive a 3-year warranty if you decide to buy it.

Wedigout Metal Detector MD-750 100Feet Waterproof Pin pointer 

The Wedigout Metal Detector is one of the best deals for 2020 if you want a waterproof metal detector but are not ready to break the bank for a high-end one.

This handheld pinpointer underwater metal detector can be submerged up to a depth of 100 feet safely. It uses PI technology to detect metal and treasures underwater, on land, and on all terrains.

The affordable waterproof metal detector has an automatic tuning setting, which means that a powerful microprocessor will control and make the sensitivity adjustments instead of you having to do so manually.

This compact underwater metal detector has a sealed and rugged housing with added stainless steel hardware and will withstand a lot of use both on land and underwater.

You can switch it on and turn it off with a single twist of the wrist. It has a LED light that will alert you of any metal detected, and there is also a vibration mode.

You can use this inexpensive metal detector for hunting for coins, jewelry, gold nuggets, relics, and for all sorts of metal detection searches and adventures on any hunting ground.

The underwater metal detector has a frequency of 20.28 kHz and can detect both small and large targets precisely.

The tool comes with a safety and comfortable wrist wrap and works with a 9V battery.

It is compact and light, and comes with a mesh pouch for easy portability and carrying even when you are swimming or diving.

The size of the handheld pinpoint metal detector is 17 x 4.5 x 4.1 inches, and it weighs only 15.8 ounces.

For the price asked, and for the quality and performance it offers, the Wedigout MD-750 could be one of the best underwater waterproof metal detectors for beginners and enthusiasts, and for use on all terrains, as well as underwater down to 100 feet in depth.

Final words

Hunting for treasures and underwater metal detecting can be a truly enjoyable and gratifying hobby to pursue if you have the right tools for it.

The most important tool you will need is a reliable and efficient underwater metal detector.

As you can see from our list, there are different types of metal detectors suitable for use in water. Some are water-resistant, and others are completely submersible.

Some metal detectors underwater work with a VLF technology, while others rely on PI to detect those hidden treasures on land and underwater.

We have handpicked the top best underwater metal detectors of all types, sizes, and price ranges, so hopefully we have managed to help you make your selection.

Make sure that you choose the one which will suit your specific needs, and the environment where you will be using it, and enjoy discovering those incredible finds on your next treasure hunt!

Last update on 2020-11-12 at 12:44 / Affiliate links / Images from Amazon Product Advertising API

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