7 Best Underwater Metal Detector And How Metal Detectors Work

If you need a new hobby, then metal detecting might just be the right one for you. The technology of metal detectors is a huge and valid part of our life. People all over the world are using it for different activities.

With this hobby, you can discover new treasures hidden under the ground and that is why I to like to show you my top 7 Best underwater metal detector to make things easy for you. 5 best Heaters for Bedroom Overnight

Metal detecting is one of the world’s leading hobbies at the moment. People go to beaches, parks, historical sites to discover the next big thing.

Although it is a hobby to some, metal detectors are also used for adequate security in places like stores, malls, airports, government offices, and many others. They can discover concealed weapons such as bombs, knives, guns, and so many threats to human life.

As a hobbyist, you should know that you can use detectors on the ground and underwater. There are so many treasures waiting to be discovered just under the water.

However, hunting in saltwater can prove to be challenging to your metal detector. Most detectors can handle various environments such as dry sand. The saltwater, on the other hand, needs to be handled by special detectors.

These detectors need to have the right features and settings to work in those conditions. If you submerge a detector that is not submersible inside water, it will end up badly. This post is going to discuss the 7 best underwater detectors.

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How metal detectors work

Every metal detector transmits an electromagnetic field from its search coil into the ground. If there is any metal object within this field, it will become energies and then retransmits its own electromagnetic field.

The search coil on the metal detector will receive the field and inform the user that there is a metal hidden underground which is producing a response. It might make a clicking or beeping sound. There are some detectors that can identify wanted and unwanted targets.

Challenges of Salt Water

The major problem of metal detecting on the beach is the rock and saltwater. The content of the water increases the effects of ground materials. This confuses land metal detectors, and as a result, they sometimes pick on wrong signals. It poses a huge problem to the detectors with preset ground balance.

Because of this, you will need a detector that is capability of ignoring the effects of saltwater. Whether you want to hunt on wet sand or in the ocean, you will need a detector that is waterproof to avoid frustration and difficulties.

7 Best underwater metal detector

There are various differences between a metal detector that is weatherproof or waterproof. Any detector that can be fully submerged into water is completely waterproof. You can use it underwater without causing damage to it. However, the depth it can go depends solely on the capacity of the detector. Even though your detector has a submersible coil, it does not mean it can be submerged inside water. Most detectors have a control box that cannot get wet.

So, a metal detector with a waterproof coil might necessarily not be able to function underwater.

Here are some of the metal detectors you should consider, if you want to hunt underwater.

Garrett ATX Deepseeker

This is the top pick if you have any intentions of going to hunt under water. It uses a pulse induction, and can find objects like jewelry, gold that are in extreme conditions. It has two types of package which are Standard and Deepseeker.

The deepseeker has a 20-inches search coil which lets it have high depth. It can detect targets that are about 18” deep. The standard detector, on the other hand, is less expensive and has a 10” X 12” coil which also provides a wonderful depth.

The ATX detector is fully submersible underwater but you can also use it in the shallow surf. You can purchase it here on Amazon.


This is an outstanding detector that is designed to work in the toughest environment. If you want an all-round detector that can work perfectly with shallow water, parks, woodlands, and so on, this is the recommended product for you. It is very versatile and flexible because of its multi-frequency technology, search modes, and response time.

In addition, it has a wireless design, goldfield prospect setting, 4 ground balance mode, and newer features.

Even underwater, it is very easy to carry around. You can use it for long beach hunting sessions. You can get it here on Amazon.

Minelab CTX 3030 Standard Pack

This detector is versatile and also flexible. It can be submerged inside water for up to 10 feet (3m). It has a mapping tool that will upload all its settings and target location to your personal computer. In addition, it has a GPS location tool that sees the location of your target. You can obtain it here on Amazon.

Garrett Sea Hunter Mk-II

This detector can handle saltwater surfing or diving. It has a pulse inductor that has a depth of 200 feet.  This product comes with headphones and has high sensitivity when hunting for metals. One of its special features is that it is discrete trash. This means that it recognizes between wanted and unwanted trash. This saves precious time and lets you move to the next target. It is cheaper than the Minelab and XP. You can as well buy it here on Amazon.

Garrett AT Pro

This metal detector is highly suitable for most environments. It is a VLF detector and does not have multi-frequency technology. However, it has an operating frequency of 15kHz and this makes it suitable for small targets. AT Pro has a manual and automatic ground balance and it is highly suitable for saltwater hunting. In addition to that, it is submersible underwater to 10 feet in depth. You can get it here on Amazon.

Fisher CZ21-8 Underwater Metal Detector

You can use this metal detector either for fresh or saltwater. It has a depth of up to 250 feet. Some of its features are touch button, easy ground balance, precise pointing, and so on. According to customers’ reviews, it is recommended for surfing, diving, and shallow water. You can purchase it here on Amazon.

Whites TDI BeachHunter Extreme

This is a submersible Pulse induction detector that has a maximum depth of 25 feet. It has high performance and sensitivity. This product has a pulse delay seeing that can be adjusted. With this, you can change the sensitivity of your machine to find small targets at greater depths. Even in difficult conditions, this device provides excellent depth. You can also swing it for a long period of time because of its lightweight. You can find it here on Amazon.

Conclusion on Best underwater metal detector

Finally, this post talked about the 7 best underwater metal detectors. If you want to hunt for treasures underwater, these are the detectors you would need. They are different from the ones used on land.

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