Top 10 Best Underwater Metal Detectors of 2024

Underwater metal detectors are a specialized device which used to locate metal objects underwater. It works by emitting electromagnetic pulses which bounce off metal objects and are detected by the device's sensors.

Best Underwater Metal Detectors
Best Underwater Metal Detectors

As technology continues to advance, underwater metal detectors have become an essential tool for divers, treasure hunters, and oceanographers. These devices can be used to find lost jewelry, coins, shipwrecks, and even sunken airplanes. Additionally, they are also used to locate and recover debris and dangerous objects from underwater environments.

However, the selection of these metal detectors is not as easy as they differ from each other in terms of depth, accuracy, and detection type. So, if you want to purchase a good quality underwater metal detector, then are you are in the right place. Here we are going to review the ten best underwater/waterproof metal detectors to help you out in finding the best one according to your needs.

On the other hand, if you want to go for other metal detectors, then here we have also a buyer’s guide through which you can learn what things you should look in an underwater metal detector before the purchase.

Best Underwater Metal Detectors

1. Fisher CZ21-8 Underwater Metal Detector – Best Metal Detector Under $1400

Fisher Underwater metal detector
Fisher Underwater metal detector
  • Product Dimensions: 12 x 6 x 21 inches
  • Item Weight: 6.6 pounds
  • Water Depth: 250 feet
  • Operating Frequency: 5 and 15 kHz

If you are searching for the best underwater metal detector, then this Fisher CZ21-8 is the perfect choice for you. It can work as deep as 250 feet underwater to help you to find the treasure you want to uncover. No matter whether it is salt or freshwater, it works effectively.

This metal detector can work on dual frequencies that are 5 kHz and 15 kHz as it is a pulse induction machine. It comes with both 8-inch and 10-inch coil options and features a Fourier domain signal analysis. It offers precise pinpointing and the VCO option for accurate target pinpointing and identification.

This detection machine also performs quite well in the mineralized soil. Also, it has a control box that is quite easy to use. If you are getting weaker signals for anything, you can increase the volume to listen to the signals carefully.

There is also an all-metal auto-tune mode, but the machine also features a discrimination mode having three different tones. The highest and loudest tone is for coins and jewelry. A medium-level tone is for gold and foil. And when you hear the low tone, then it means there is iron near you.

Other than this, its pole assembly is fully collapsible. Also, control housing is removable. Moreover, it requires four 9V alkaline batteries, weighs 6.6 pounds, and comes with a 2-year warranty.

2. Garrett Sea Hunter Mark II Underwater Metal Detector – Best Metal Detector Under $1000

Garret Sea Hunter underwater metal detector
Garret Sea Hunter underwater metal detector
  • Product Dimensions: 26.5 x 12.4 x 3.3 inches
  • Item Weight: 3.2 pounds
  • Water Depth: 200 feet

This Sea Hunter Mark II from Garrett is another high-quality underwater metal detector that has an operating depth of 200 feet. For beach hunting and scuba diving, this metal detector is an ideal choice for you.

It comes with a pulse induction technology that avoids the salt and ground mineralization and only focuses on metals, coins, jewelry, and gold. The metal detector comes with four stem arrangements. You can either make it short or long to make your searching easier no matter whatever the location and situation are.

The Garrett Sea Hunter Mark II has an excellent discrimination system having two different modes. One is the Standard, and the other one is Discrete. Its custom-designed housing and multiple configurations make it different and superior to many of the underwater metal detectors.

It has a rapid target response, offers greater sensitivity, and features an 8-inch epoxy-filled search coil. It also features a hip mount belt that helps you to do long searches with ease.

3. Minelab Equinox 800 Metal Detector – Best Metal Detector Under $999

 Minelab Equinox 800 Metal Detector
Minelab Equinox 800 Metal Detector
  • Product Dimensions: 56.7 x 12.28 x 4.96 inches
  • Item Weight: 2.96 pounds
  • Water Depth: 100 feet

MINELAB offers a Equinox 800 Metal Detector that is completely waterproof having an operating depth of 100 feet. It comes with Waterproof Coil so it won’t sink into the water. Also, its lightweight keeps the perfect balance between floating and sinking.

The Equinox 800 Metal Detector comes with a EQX 11” Double-D 11-inch coil that offers excellent sensitivity of pulse induction detection. The searching coil is quite sensitive to gold, but it doesn’t mean that it is not suitable for detecting other metals. The pulse induction technology helps to find the treasure in the saltwater and mineralized ground.

Other than this, the metal detector features an adjustable pulse delay that helps you to find your targets easier. It decreases the noise from junk and black sand.

Moreover, it is quite easy to use and requires eight AA batteries to make it operational.

4. Garrett AT Pro Metal Detector – Best Metal Detector Under $600

Garrett AT Pro under water metal detector
Garrett AT Pro under water metal detector
  • Product Dimensions: 22 x 11 x 5 inches
  • Item Weight: 3.03 pounds
  • Water Depth: 10 feet

This Garrett AT Pro is a waterproof metal detector but can only work 10 feet deep inside the water. For in-depth findings, it is not designed for that purpose. It also works perfectly in wet, dusty, and humid environments.

Ideally It is used to find jewels, coins, gold nuggets, and caches. It comes with two searching modes. One is the Standard mode, and the second one is the Professional search mode. Standard mode is for beginners that simplifies the audio signals. And the Professional mode provides with detailed audio feedback.

The true all-metal mode allows the users to hear the characteristics of the metals they are targeting. The machine is also is equipped with high-res iron discrimination that is responsible for splitting useful targets from trash. The 0 to 99 digital target ID scale differentiates the conductivity of one target from the other one.

The last thing about this metal detector is that it is easy to use, and requires 4 A batteries to become operational.

5. Garrett ATX Deepseeker Underwater Metal Detector – Most Expensive Underwater Metal Detector

Garrett ATX Underwater metal detector
Garrett ATX Underwater metal detector
  • Product Dimensions: 25 x 20 x 10.5 inches
  • Item Weight: 34.9 pounds
  • Water Depth: 10 feet

This Garrett ATX Deepseeker metal detector can work well underwater. It has an operating depth of 10 feet. Beyond this depth, it fails to work. It is a pulse induction machine having a large size searching coil that works well in saltwater to help you in finding your targets fast and with accuracy.

You can either set the default setting or choose between four different settings according to your needs. In a default setting, the machine will change itself to focus on your target. Also, you can adjust the four settings as per your preference.

It also has a simple LED screen having indicators to show you the signal strength of your target as well as your current settings. Moreover, you can adjust the volume control to listen to the faint signals carefully. Also, you have a waterproof speaker to get notified without using the headphones.

The machine also has a quick iron check feature and offers adjustable discrimination option.

6. Bounty Hunter TK4 Tracker IV Metal Detector – Best Metal Detector Under $200

Bounty Hunter deep sea metal detector
Bounty Hunter deep sea metal detector
  • Product Dimensions: 28.2 x 10 x 6.2 inches
  • Item Weight: 3.7 pounds
  • Water Depth: 8 feet
  • Operating Frequency: 6.7 kHz

This Bounty Hunter TK4 is made for extremely tough conditions. It comes with an 8-inch waterproof searching coil that can locate your coin size targets up to 8 inches deep. But if you want to look for more significant targets, then the machine can only work up to 3 inches deep.

It comes with an operating frequency of 6.7 kHz and requires two 9V alkaline batteries for operation. If we talk about its operating features, then there are three modes of operation. The all-metal motion mode notifies you on the detection of every metal. The discrimination model differentiates between the target types. Also, there is a 2-tone audio mode.

The metal detector doesn’t count the minerals. Also, its disc/notch control differentiates between the useless metals and the useful targets.

Other than this, its control interface is easy to use. Just turn the knobs and select your desired settings. Moreover, there is a built-in speaker, so there is no need to wear the headphones.

7. SAKOBS Waterproof Metal Detector – Best Metal Detector Under $150

SAKOBS Waterproof Metal Detector
SAKOBS Waterproof Metal Detector
  • Product Dimensions: 33.46 x 11.42 x 6.3 inches
  • Item Weight: 4.5 pounds

Another great waterproof metal detector on the list is from New Home Innovations that both adults and kids can use for hours to find the treasures inside the ground. You can use it on the beach or in your garden or backyard. It helps you to find metals, coins, jewelry, and gold along with the pieces of silver.

The best thing about this metal detecting machine is that it is super-easy to use. Its pin-pointer function, built-in speakers, one-touch auto-tune option, and the comfortable arm-supporting handle make treasure hunting easier and safer.

The sensor installed in the searching coil is of high-sensitivity. You can look for your targets with ease and in no time. The discrimination feature lets you forget the unwanted metals. Also, the low-battery indicator notifies that you have less time to look for your treasure.

A multi-functional folding shovel is also included in the package. Also, a beginner’s guide and a user guide are always there to help you.

8. wedigout Fully Waterproof Underwater Metal Detector – Best Metal Detector Under $300

wedigout Fully Waterproof Underwater Metal Detector
wedigout Fully Waterproof Underwater Metal Detector
  • Product Dimensions: 14.53 x 6.06 x 2.68 inches
  • Item Weight: 325 Gram
  • Water Depth: 100 feet

Another pulse induction metal detecting machine on the list is from TTLIFE. It is designed to use both in saltwater and freshwater. The machine can work as deep as 100 feet to help you find your coins, jewelry, metals, and other things.

This metal detector assists you in finding the right place where your target is buried. It not only works underwater but also in any type of soil or land. When it detects the target, the unit alerts you with the pulses of vibration.  Also, the bright white light flashes when the detector finds the target. When the probe tip reaches the target precision pinpointing, you will notice the increase in the frequency of the vibration pulses.

Moreover, the machine features an easy tilt on and off option. Also, there is a low battery indicator that senses the weak position of the battery and alerts you before shutting down automatically.

If we talk about the downside of the product, then according to some users, the vibration feature starts causing problems just after few months of usage.

9. Bounty Hunter TK4 Tracker IV Metal Detector, 8-inch Waterproof Coil Detects – Features an Earphone Jack

Bounty Hunter TK4 Tracker IV Metal Detector
Bounty Hunter TK4 Tracker IV Metal Detector
  • Product Dimensions: 28.25 x 10 x 6.25 inches
  • Item Weight: 3.70 lbs
  • Operating Frequency: 6.6 kHz

This waterproof metal detector from Bounty Hunter comes with three dominant detection modes. The all-metal mode allows you to find any metal with ease. The adjustable discrimination mode helps you to differentiate between the target objects. And the 2-tone audio mode comes with an automatic iron rejection.

It is designed to work in both salt and freshwater. Its 8-inch waterproof searching coil is highly sensitive. Also, the coil and stem are weather resistant. Moreover, the stem is also adjustable.

The Bounty Hunter also features a 3.5 mm earphone jack so that you can hear the alerts nicely with the help of an earphone. Its control panel features a meter and two knobs along with additional buttons for slight customization with the search.

But the main drawback of this product is that it doesn’t work deep down the water.

10. 750 Underwater Metal Detector for Diving – Lightest Underwater Metal Detector

Underwater Metal Detector for Diving
Underwater Metal Detector for Diving
  • Product Dimensions: 20 x 5 x 5 inches
  • Item Weight: 1 pounds
  • Water Depth: 100 feet
  • Operating Frequency: 6.8 kHz

The last but not the least underwater metal detector on the list is from VVinRC. It has an operating depth of 100 feet. Its highly sensitive search coil detects the exact location of the target objects. You can either use it in water, on land, or in soil because of its pulse induction technology.

It features tilt on and off option that makes it easy to use. When the coil detects the metal, it starts to vibrate and the LED light flashes. Its built-in advanced microprocessor and auto-tuning feature offer stable detection depth that helps you to find the correct location of the target all through its battery life.

It requires a 9V battery for operation, but it is not included in the package. You have to buy it separately.

How Underwater Metal Detectors Work

Treasure hunting is thrilling, especially underwater. Underwater metal detectors unlock hidden gems in the deep blue—think jewelry, coins, or historic relics! But what's the secret behind these underwater wizards? Let's dive into the workings of underwater metal detectors and discover the science beneath the search.

Electromagnetic Induction

Electromagnetic induction metal detectors send electricity through a coil. This creates a magnetic field. When the detector nears metal, the field changes. The detector senses this change and beeps. Here's a simple breakdown:

  • transmitter coil generates a magnetic field.
  • Metal objects disrupt this field.
  • The receiver coil picks up these disturbances.
  • Signals processed and alert the user.

Pulse Induction

Pulse induction models are strong for saltwater and mineral-rich environments. A single coil or a series of coils send pulses. These pulses generate a magnetic field. Each pulse generates a reflective magnetic field when hitting metal. This is how they work:

  • Short electrical pulses pass through the coil.
  • Metal objects create an echoed pulse.
  • The detector catches the echo to signal metal.
  • Pulse induction is ideal for deep water.

Types Of Underwater Metal Detectors

Exploring the ocean's secrets isn't just for divers and marine biologists. Treasure hunters and history enthusiasts also plunge into the deep blue with underwater metal detectors. These specialised tools open up a new world of discovery below the surface. From shipwrecks to lost jewelry, the right device helps uncover hidden wonders. Let’s dive into the different types available.

Handheld Metal Detectors

Handheld metal detectors are perfect for shallow expeditions. They are lightweight and easy to maneuver, making them a top choice for quick searches.

  • Convenient for snorkeling
  • Usually have a shorter range
  • Ideal for kids and beginners

Dive Metal Detectors

Dive metal detectors cater to those who venture deeper. Built to withstand pressure, they will not let you down when you're several feet underwater.

Long range detectionCovers more ground
Rugged designDurable in harsh conditions
Adjustable sensitivityFine-tunes your search

Scuba Metal Detectors

Scuba metal detectors are the companions of serious underwater explorers. Their sensitive detection allows searching through coral, sand, and silt with precision.

  1. Highly sensitive to metals
  2. Designed for deep dives
  3. May include features like LED indicators and control settings

Features To Consider

Choosing the right underwater metal detector is key to treasure hunting success. Before diving in, it's crucial to know the key features that make a great detector. Let's explore what to keep in mind.

Waterproof Rating

Waterproof rating is the backbone of any underwater metal detector. Look for a device with a high Ingress Protection (IP) rating. This ensures the detector can handle submersion.

  • IP68 – Complete protection against dust and long-term immersion.
  • IP67 – Dust tight and protection against temporary immersion.

Target Discrimination

Target discrimination helps you avoid junk. It separates treasure from trash. This feature saves time and enhances the search experience underwater.

LowPicks up all metals, including junk.
HighFilters out undesired objects.

Depth Range

Depth range indicates how deep the detector can sense metal objects. A larger depth range means reaching deeper treasures. Choose based on the depths you plan to explore.

Common depth ranges:

  1. Up to 10 feet – For shallow dives.
  2. Up to 100 feet – For deeper underwater adventures.

Search Coil Size

The size of the search coil affects detection. A larger coil covers more ground but may be less sensitive to small items. A smaller coil offers precision.

Choosing the coil size:

  • Large coil – Best for open areas.
  • Small coil – Ideal for tight spaces.

Best Practices For Using Underwater Metal Detectors

Mastering the use of underwater metal detectors can turn a dive into a treasure hunt. Uncovering hidden riches or relics beneath the waves requires know-how. Embrace these best practices for a successful underwater search.

Research The Dive Site

Understanding your dive site is crucial for a successful search. Study historical data and marine charts. Investigate reports of shipwrecks or popular swimming areas. Such spots often yield more finds. Keep in mind that known sites might have specific laws on salvage rights.

Use Proper Technique

  • Maintain a steady pace to allow the detector to process.
  • Keep the coil close to the seabed for the best chance of detection.
  • Overlap sweeps to ensure full coverage.

Be Mindful Of Environment

Preserving marine ecosystems is paramount. Operate carefully around coral reefs and habitats. Minimize disturbances to the seabed. Remove and dispose of any trash encountered.

Safety Tips

Check EquipmentEnsure your metal detector and diving gear are in top condition.
Buddy SystemAlways dive with a partner for safety.
Plan Your DiveMap out your search area and keep track of time and air supply.

Popular Brands Of Underwater Metal Detectors

The quest for hidden treasures takes many enthusiasts below the waves, where underwater metal detectors prove invaluable. Reliability, durability, and technology converge in devices from the industry's trusted brands. Divers and treasure hunters favor certain brands for their cutting-edge features and proven performance. Let's submerge into the details of the top brands in this exciting niche.


Garrett Metal Detectors resonate with quality and performance. Known for their advanced technology, Garrett detectors cater to both amateurs and pros. Popular models like the Garrett AT Pro boast all-terrain versatility, including underwater up to 10 feet. Dependability defines this brand, with its products often featuring ergonomic design for comfortable, lengthy hunts.

  • High-tech features such as Digital Target ID
  • Waterproof up to significant depths
  • Models offer selectable search modes


Minelab's reputation for deep detection is underscored by their use of Multi-Frequency technology. Their metal detectors, like the acclaimed Minelab Excalibur II, are a staple among serious underwater treasure seekers. They offer robust construction combined with high sensitivity to metals of all kinds.

  • Multi-Frequency technology for efficiency in various soils
  • Rugged design for challenging environments
  • Innovative features like automatic ground compensation


Fisher stakes its claim in the metal detecting community with user-friendly interfaces and functional designs. The Fisher CZ-21 is a favorite for its submersible capabilities and practical functionality. It excels in both fresh and saltwater conditions, giving users a versatile tool in their search for treasures beneath the surface.

  • Submersible up to 250 feet
  • Easy-to-use control for all experience levels
  • Dual-frequency operation for diverse conditions
BrandModelDepthTechnologyUser Interface
GarrettAT Pro10 feetDigital Target IDEasy
MinelabExcalibur IIVariesMulti-FrequencyIntermediate
FisherCZ-21250 feetDual-FrequencySimple

Buyer’s Guide

Before going to purchase the best underwater metal detector, it is necessary to go through every aspect and feature of the product. Without ensuring that you are purchasing the right product according to your needs, it is useless to buy it. So, here in this buying guide section, we are highlighting some factors that you should consider before spending money on a particular underwater metal detector.

Type of Detection

The first thing that you must look at is the type of detection your underwater metal detector features. These metal detectors feature two types of deduction. One is the VLF detection that is very low-frequency detection. And the other one is the Pulse Induction detection.

VLF detectors are highly sensitive to minerals. They are designed to use in freshwater where the minerals are in low quantity. They mainly focus on those metallic and precious objects which you want to find under the ground and ignore the other things.

But if we talk about the Pulse Induction detection system, then it is not sensitive to minerals. Therefore, you can use this detection system in the ground. Also, they work in any type of soil and the saltwater. But they do catch unwanted junk which is a negative side of the PI model.

Also, if we talk about the difference in price, then PI models are more expensive as compared to the VLF detection systems.

Operating Depth

How far your metal detector can go inside the water is important to know. Some metal detectors can go as deep as 250 to 300 feet and work perfectly fine. Whereas some metal detectors can only detect metals as far as 10 to 15 feet. Moreover, there are also other metal detectors that come with waterproof coil and stem, whereas some other machines only feature waterproof coils.

So, it depends on your needs and the work you do to either select a detector that offers good operating depth or to select one that features only waterproof searching coil.

If you don’t know the art of swimming or haven’t gone deep underwater, then the metal detectors that can go more than 200 feet below the surface are not for you. But if you mostly do scuba diving, then you must go for that. However, it is recommended to select a product with greater depth because you never know when you will be going to hunt for treasure deep down the water.

Weight and Buoyancy

Another important factor that you must consider is the weight and buoyancy. As you are going to dive into the water with the metal detector so it must have neutral buoyancy so that it fails to sink quickly. Also, the metal detector must not be so light to move upwards frequently.

So, here, balance is the key. Therefore, it is necessary to check the weight of the metal detector before buying to ensure that it will not sink too quickly or try to float constantly to the top.


Accuracy is the key for metal detectors. If you have a metal detector that is not accurate, then you won’t be able to find the treasure on time. Each model differs from the other one in terms of accuracy. So, before purchasing your ideal metal detector, it is necessary to read the product description. Also, it is essential to read the reviews of the users to ensure that you are buying the right product.

If you are not going to find anything deep then you may not need a metal detector having long-range and accuracy. But if you always go deep inside the water, then accuracy and range count much because as you go deep, it becomes hard to find the hidden objects.


Your metal detector should be versatile. Some of the metal detectors only work in freshwater, whereas there are many detecting machines that work in both salt and freshwater. These types of detectors feature pulse induction technology that allows them to work both in fresh and saltwater. Also, if you want to look for metal objects on land, then these metal detectors will also help you out.

Other than this, if you want to use an underwater metal detector on land, then you have to focus on the weight of the machine as you will surely find it heavy to handle the machine on land.

Locking System

A good locking system is also quite essential for a metal detector. If you are buying a detector that is fully submersible, then it must have a strong locking system to keep the entire unit together even when the strong waves meet the stem.


As you can use the underwater metal detector on land so it must be weather-resistant if you are willing to use it on land to find out the metal objects.

Battery Backup Feature

Battery backup feature is also quite essential. The reason for this is that it will not allow the detector to shut down when the original battery loses its power. The unused extra battery will get activated when the used one becomes zero.

Additional Features/Accessories

If we talk about the additional features/accessories, then waterproof headphones are an excellent addition. Also, 2-tone audio is an improvement and must-have in your selected metal detector. Other than this, some metal detectors come with extra detecting features. When they detect any object, they vibrate as well as the bright light flashes to make you aware that you are quite near to your treasure.


Price is another thing that you must look at. Basic and simple underwater metal detectors are low in price, whereas advanced machines are expensive. Also, the type of detection determines the price of the metal detector. If there is VLF detection, then the price will be low, but if there is a pulse induction, then the price will be higher.

Frequently Asked Questions For Underwater Metal Detector

What Is An Underwater Metal Detector?

An underwater metal detector is a specialized tool designed to detect metal objects hidden in underwater areas such as lakes, rivers, and oceans. It operates by sending electromagnetic signals through the water to detect any metal objects buried underwater.

How Does An Underwater Metal Detector Work?

An underwater metal detector works by emitting a magnetic field and detecting any disruption in that field caused by metal objects hidden beneath the water surface. The device then alerts the operator through sound or visual indicators to the presence of metal.

What Metals Can Be Detected With An Underwater Metal Detector?

An underwater metal detector can detect a wide range of metal objects including coins, jewelry, relics, and even large sunken vessels. It can detect metals such as gold, silver, copper, aluminum and many others.

Can Underwater Metal Detectors Be Used In Saltwater?

Yes, underwater metal detectors can be used in saltwater. However, saltwater causes interference with the signals emitted by the detector, which can make detecting metal objects more difficult.

What Are The Benefits Of Using An Underwater Metal Detector?

Using an underwater metal detector allows you to explore underwater areas and discover interesting and valuable objects. It is a fun and exciting hobby that can also be profitable, as you may discover treasure or lost items that have significant historical or cultural value.

What Features Should I Look For When Buying An Underwater Metal Detector?

When buying an underwater metal detector, consider features such as depth rating, discrimination settings, sensitivity, and target identification capabilities. Also, look for a detector that is durable, lightweight, and has a long battery life.


After reviewing the many benefits and advantages of using an underwater metal detector, it's clear that this tool is a great investment for any water enthusiast or professional. With enhanced technology, waterproof capabilities, and the ability to detect even the smallest metals, an underwater metal detector can make any diving experience more exciting and rewarding.

Whether you're searching for submerged treasures or working on important archaeological excavations, this tool can prove to be a valuable asset. As the technology continues to advance, we can only expect even more innovations in underwater metal detectors. However, it's important to remember to always practice responsible metal detecting, obeying local laws and regulations, and treating the underwater environment with care and respect.

Investing in an underwater metal detector not only enhances our diving experiences, but also contributes to the preservation and exploration of our underwater worlds.

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  • Reduanul hasan

    I am a researcher and writer with a background in the health and information Technology. I have a keen interest in exploring the intersections of social issues and public policy. My work is informed by my commitment to social justice and my belief that knowledge is power. I strive to produce work that is rigorous, accessible, and relevant to the real-world problems faced by those who are most affected by wrong information.

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