6 Best Waterproof Metal Detectors of 2020 – (Reviews & Guide)

Metal detectors are capable of finding valuable metals on all types of terrain. But what happens when you introduce them to a wet surface? That is when waterproof metal detectors earn their value, with many of them able to be fully submersed. This completely opens up the way most users search for valuables and introduces them to a lot of new features. There is a lot of competition in this category, with brands delivering where it matters the most.

Waterproof Metal Detectors Reviews

Waterproof Metal Detectors Comparison
Top Rated

Best Waterproof Metal Detectors

  • Dimensions: 24.1 x 7.5 x 5.1 inches
  • With its one touch auto-tune
  • Included a nifty 5 in 1 digging tool

Bounty Hunter TK4 Tracker IV Metal Detector

  • Dimensions: 28.2 x 10 x 6.2 inches
  • 6.7 kHz operating frequency
  • Larger objects up to 3 feet

INTEY Metal Detector

  • Dimensions: 20.9 x 9.1 x 6.9 inches
  • High sensitivity
  • Waterproof- adjustable stem and the search coil

Goplus MD-4030 Underground Metal Detector

  • Dimensions: 23 x 22 x 9 inches
  • Frequency: 5.0 KHz
  • Current: Standby: 10mA,Max: 70mA

ZAAP Metal Detector

  • Dimension: 6.7 x 14 x 22 inches
  • Power: 6 x 1.5V AA battery
  • Frequency: 5.5KHz

NHI Metal Detector Starter Kit

NHI Metal Detector Starter KitThis low priced NHI metal detector starter kit is marketed towards beginners that want to learn the ins and outs of the craft. It has a lot of comfort features so that you can use it for hours without strain. But the star of the show is the thick beginners guide book that comes in the package. This is the best introduction to metal detector use on the market, and although it is made for kids/juniors, adults can still get a lot of use out of the set. With a two year warranty attached, this is a great deal for all ages.

The waterproof coil detects all metals, even gold nuggets. You can eliminate unwanted targets using the discrimination function. Since the set comes with a multi-function folding shovel and pinpointer, there is a higher chance of you finding the correct materials rather than wasting time on incorrect objects. Batteries last a long time, with the hard to miss low battery indicator always in plain view when needed. Going into deeper waters isn’t a problem since the stem is waterproof, something that is considered a major feature for a metal detector this low priced. As a package, this starter kit from NHI comes highly recommended for daily use.

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Bounty Hunter TK4 Tracker IV Metal Detector

Bounty Hunter TK4 Tracker IV Metal DetectorThe Tracker IV is available as a base unit or as a starter set. Base unit pricing makes the TK4 one of the lowest metal detectors in the waterproof category, while the starter set puts it at an average price. Key features for the base model is the two tone audio and ruggedness of the metal construction. It was built for tough environments so will be able to take a lot more punishment than competitor products. Other useful modes are the all-metal and discrimination mode, with the latter reaching its full usefulness when paired with the superior ground balance.

Buyers that opt to purchase the starter kit get the base metal detector plus headphones, a carrying bag, pinpointer and pouch/trowel combo kit. The headphones are the big surprise of it all since Bounty Hunter chose to go with their more popular Head-PL models. They are padded and comfortable, and completely compatible with all Bounty Hunter metal detectors that aren’t in the junior family. In fact, the headphones make the package a lot more attractive if you want to use it in headphones only mode. Either version of the Tracker IV is a winner since the price is so accommodating to customers.

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INTEY Metal Detector

INTEY Metal DetectorAnother low priced metal detector that is worth investing in is this starter set from INTEY. The all metal mode is high powered enough to make it viable for any terrain. This also applies to beach and shallow water hunting by using the waterproof stem with adjustable coil. Discrimination mode comes with multiple features that makes prioritizing a target much easier. Iron, zinc/1 cent, coppers and pull rings are all part of the setup when discriminating metals. The pinpointer feature is helpful when used with the disc option, and should save you time when targeting objects that are deep in the ground or water.

Since the stem is adjustable, you can have it match your height or extend it to reach lower in the water. Extras bundled with the kit include a carrying bag, multi-function folding shovel and a complete user guide. A hidden specialty of this model is how it handles batteries with the backup feature. One 9 volt battery is needed to start operations, but there is a slot for a second one to serve as a backup when the first one fails. Consumers can depend on this feature so that they are never in a bad position while searching for objects. Although a lot of the features of this starter kit can be found in other models, the price and intelligent battery usage makes it worth a buy.

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Goplus MD-4030 Underground Metal Detector

Goplus MD-4030 Underground Metal DetectorGoplus specializes in low priced metal detectors that incorporates several mid to high tier features. The MD-4030 is their best waterproof model, and also the most recommended metal detector in its price class. Build quality is solid, using a steel frame with pp handle to comfort the user without compromising the durability of the device. Everything is powered by two 9 volt batteries, using a max of only 70 mA when at full power. The standby power usage of 10 mA is a big deal by letting users keep the same battery for months without needing to swap out. A lot of that has to do with the low frequency, but it is still an impressive feat for a waterproof metal detector.

The control panel is traditional, meaning it is two knobs, a button and a meter. This is as simplistic as you can get, so it gains a lot of favoritism from beginners. Experienced users that are nostalgic about the old metal detector interfaces will also find it to be pleasing to the eye, or at the very least the closest modern equivalent to the older devices. Operational modes are listed as all metal and disc, so the basic two modes on all metal detectors. There is a headphone jack that outputs simple tones when near a target, so good headphones are recommended. Sometimes simple is better, and that is why the MD-4030 is a great low power metal detector for all users.

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ZAAP Metal Detector

ZAAP Metal DetectorZaap is an interesting company that is in direct competition with Goplus. They are also part of the low cost metal detector movement, and have produced several notable models. This particular device borrows heavily from their past successes, starting with the much loved two tone audio mode. It pairs well with the 3.5 earphone jack if you use quality headphones. The jack is worth mentioning since a few brands in the industry have gone to proprietary headphone options. ZAAP makes it easier for the average customer to attach a great pair of headphones to their metal detector while searching in noisy areas.

Both freshwater and saltwater are supported by the 8 inch waterproof search coil. That is a surprising inclusion when you consider the low price of this product and compare it to the competition with similar features. The entire coil and stem is weather resistant, and both the stem and discrimination modes have multiple adjustment settings. Zaap went with a meter and two knobs for their control panel, but also added additional buttons at the bottom to support light customization options with the search- once again, surprising in its price category. Buyers are getting a great value with this metal detector, which is one of the better buys in the entire industry.

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Garrett ACE 200 Metal Detector

The dependable waterproof coil of the Ace 200 is exactly what you need when searching water is an option. It is 6.5×9, so more than enough to cover land or water areas. The Ace 200 starter kit is a mid to high price choice that comes with a lot of useful extras. While using the Garrett Treasure Sound headphones you’ll notice it gives clear tones in noisy areas. They are comfortable to wear for extended periods of time, while also being useful as stereo headphones. Currently these are the second best pair of headphones from the Garrett brand.

The instruction manual is full of useful information for all levels of users, with the company making it a point to prioritize the usefulness of the light weight and waterproof coil. Four AA batteries are included and should last a couple of months without needing to be changed. They are branded, but it is the low power consumption of the Ace 200 that makes them last so long. As long as you stick to branded batteries when replacing the originals, you can expect similar performance. This starter set does a good job of being a reliable choice for users that want a waterproof metal detector.


Brands in the waterproof metal detector category are strong performers when submersed. They are made to have the most advantages when searching for objects on the beach, lakes, ocean and or other areas with water. There are a lot of low priced products in this category, which is a big difference from the professional category that has mostly high priced models. Variety in the brands is also big in this category, and you’ll find a lot of new and old names that don’t pop up in other lists. Zaap is one of those small names that pops up, and their product is a surprising value worthy of a purchase.

Best Features

Waterproof metal detectors have a lot more to offer than their ability to be used in wet areas. Some of these features are even favored by professionals.

Waterproof Stem – Not only is the search coil waterproof, but so is the stem. Adjustable stems let you extend your range in wet areas to find more treasure.

Low Price – Most of the products in this category have a low price tag. Even if you choose a starter kit, the price of the kit is still lower than other models.

Freshwater& Saltwater Usage – Waterproof metal detectors can go in both types of water without getting damaged. It’s still important to check for saltwater usage, since some models don’t support it.

Weather Resistance – Waterproof models are naturally strong in rainy weather. Advanced models also incorporate other weatherproof features to round out the durability of the product.

Battery Backup – Users that are tired of having to swap out batteries while searching can rest easy with the battery backup feature. It stores an unused extra battery in the device and activates it when the original loses power.


Some models keep the coil wire enclosed within the stem (Zaap) while others have the coil visibly wrapping around the stem. There is no danger in the coil wire being exposed, with plenty of those types being fully submersible. Other than the coil look, there are not a lot of big differences in the designs. Some color variations will pop up, but nothing that stands out from the average metal detector. The control panel is where a lot of the differences are seen, since there is a mixture of LCD and traditional meter layouts. As a result the control panels for both types are a lot less cluttered than other metal detectors.

What Should You Look For In A Waterproof Metal Detector?

Plenty of up to date features define the many pros of owning a waterproof metal detector. With all of the choices available, things can get confusing when making a purchase. Here are a few of the features that should be prioritized when buying a waterproof metal detector.

Water Depth – Find out how deep the product can go in the water. It’s also important to note if the stem is submersible. The deeper the metal detector can go in the water, then the better chance you have of searching hard to reach areas.

Audio Support – Models that have support for enhanced audio are better equipped to handle wet conditions. Even two tone audio is an improvement over the default, with or without the use of headphones.

Water Type Support – Saltwater support is not always handled by waterproof metal detectors. Having support for it is a big plus and keeps you from damaging the product. Using an unsupported metal detector in saltwater will damage it or give you false readings.

Starter Sets

The importance of starter sets is sometimes underplayed for water metal detectors. Any set with a pinpointer, headphones or multi-function shovel will put you in a much better starting position (if you don’t have any of those materials). Headphones in particular are needed when working in water areas due to the amount of activity. Even if the set doesn’t come with headphones, it will more than likely have support for enhanced audio. This is important not only for detection, but also for discrimination functions. Any included pinpointer is useful and will go a long way in saving you time while searching in water.

The Importance Of A Good Locking System

Locking systems for waterproof metal detectors play a role in keeping the stem stable. If the stem is submersible, then it is doubly important that the locking system is strong enough to keep the entire system together. A bad lock will throw off the balance of the metal detector, leading to false readings. In a worst case scenario, a strong current could knock the stem apart from the coil. Garret is a nice choice with their Camlock feature for all of the major series. They even sell it separately in case you want a backup. This is unique to Garrett, so buyers may want to take that into consideration when making a buying decision.

Does Length Matter?

Longer isn’t always better, although it will let you reach farther when going underwater. A longer stem will let you reach new areas, but consumers should take other things into consideration;

Balance – Metal detectors that don’t balance out their weight will either be bottom heavy or top heavy. Bottom heavy means that the search coil is the heaviest part of the product. This will cause arm fatigue when using it for a couple of hours. Top heavy means the control panel is the bulk of the weight, which in turn will hurt your shoulder. Having a long stem is always preferred, but it needs to balance out the weight evenly across the metal detector.

Locking System – It was discussed before how a locking system is an essential part of owning a metal detector. For devices with long stems, it is a must to have a competent locking system. The longer stem means that a metal detector is more prone to breakage and weight distribution issues. A locking system can ease the pains of these cons to a certain extent, and also save you the headache of needing to do a repair.

Replacement Stems Are Rare – Lower durability from a longer stem needs to be taken into account if you prefer to do your own repairs. There are not a lot of brands that sell the part by itself, so if a particular model has a history of low quality stems, it is better to go with a shorter but proven stem length from a better model.

Waterproof Metal Detector Comparison Chart

Metal DetectorWeight Dimensions WarrantyRating
NHI Metal Detector Starter Kit2.65 pounds 24.1 x 7.5 x 5.1 inManufacturer8
Bounty Hunter TK43.7 pounds 28.2 x 10 x 6.2 in5 Year 9
INTEY Classic5.3 pounds 20.9 x 9.1 x 6.9 inManufacturer8
Goplus MD-40303.1 pounds 23 x 22 x 9 inManufacturer7
ZAAP Metal Detector2.4lbs 6.7 x 14 x 22in Manufacturer9


Finding the right mix of quality and extras is a joy when shopping for waterproof metal detectors. The prices are low, and their accuracy underwater only adds to the value.