Whether you’re searching for coins along the shoreline or diving for lost relics beneath the waves, a quality waterproof metal detector opens up a whole new world of treasure hunting. However, with numerous models available on the market, how do you determine the right one? In this guide, we explore the top-rated waterproof detectors, must-know features, and expert tips to help you make the best choice for your next underwater adventure.
What Makes a Metal Detector Truly Waterproof?
If a metal detector can be submerged in water without harming its internal parts, it is said to be waterproof. However, there is a significant difference between water-resistant and fully waterproof designs. Here’s what sets a truly waterproof detector apart:
- IP Rating: The IP (Ingress Protection) rating is the gold standard for assessing waterproofing. It consists of two digits—one for dust protection and one for water resistance. The detector is perfect for underwater use because it has an IP68 designation, which indicates that it is completely dustproof and can be submerged in water for longer than one meter.
- Waterproof Coils: Even if the control box isn’t submersible, many detectors have waterproof coils that allow you to search in shallow water. For full underwater detecting, the entire coil and its cable must be completely waterproof and sealed.
- Sealed Control Box: A critical component for full submersion is a sealed control box. This protects the electronics from water damage. Quality waterproof detectors utilize gaskets, O-rings, and specialized seals to prevent moisture from entering, even under high pressure.
- Waterproof Headphone Jacks: If you want to hear tones clearly underwater, waterproof headphones (or adapters) are essential. Some models feature sealed 3.5mm or proprietary waterproof connectors, while others utilize wireless, waterproof headphones specifically designed for submersion.
- Submersion Depth: Shallow-water detectors typically allow for up to 10 feet of submersion, while deep-water or scuba-ready detectors, such as the Minelab Excalibur II, are rated for depths of up to 200 feet. Make sure the model you select is appropriate for the depth of the water you intend to investigate.
- Material and Build Quality: Well-designed waterproof detectors use high-grade plastic, marine-grade aluminum, and rust-resistant metals. These materials not only withstand water exposure but also resist corrosion from saltwater, which is particularly important for use in beach and ocean environments.
Key Takeaway: A truly waterproof metal detector goes beyond just a water-resistant coil—it’s fully submersible, features sealed electronics, and is built from corrosion-resistant materials. Check for an IP68 rating and ensure the depth rating matches your intended use to guarantee durability and optimal performance in any underwater environment.
Top 5 Waterproof Metal Detectors for Beginners and Pros
Here’s a quick overview of the five top-performing waterproof metal detectors for all experience levels:
- Minelab Excalibur II: Ideal for deep-sea and scuba diving, this multi-frequency detector is submersible to depths of up to 200 feet and performs exceptionally well in saltwater.
Best for: Advanced users and those who want to dive deeper.
- Garrett AT Pro: A versatile detector that works on land and in water (up to 10 feet). Offers Pro Mode audio and solid performance in freshwater.
Best for: Intermediate users and shallow water hunting.
- Nokta Makro Simplex+: A budget-friendly, beginner-friendly detector that’s fully submersible to 10 feet. Easy to use with strong features for its price.
Best suited for: Beginners and casual beachgoers.
- Fisher CZ-21: Built for saltwater and diving, this dual-frequency detector is submersible to depths of up to 250 feet and is known for its exceptional depth and reliability.
Best for: Experienced users and ocean detecting.
- Minelab Equinox 800: A powerful multi-frequency machine with waterproofing up to 10 feet. Great for both land and water, with fast recovery speed.
Best for: All skill levels and versatile detecting.
Key Takeaway: From shallow freshwater hunts to deep-sea dives, these detectors offer strong waterproof performance for every type of treasure hunter. Select options based on your environment, depth of needs, and experience level.
Can You Really Find Treasure Underwater?
Yes — and more often than you might think. Underwater environments, from shallow shorelines to deep ocean beds, are rich with lost or forgotten items waiting to be discovered. People lose valuables like rings, necklaces, watches, and coins in lakes, rivers, and oceans every day. Add to that centuries of shipwrecks, old trade routes, and historical settlements now submerged, and the underwater world becomes a treasure hunter’s paradise.
Everyday Finds
Shallow water areas near beaches are hotspots for modern-day treasure. Swimmers and sunbathers often lose jewelry, phones, and coins in the surf or on the sand. These items often settle in spots where metal detectors can easily locate them, especially after storms or heavy foot traffic that shifts sand.
Historical Treasures
In deeper water, particularly near old harbors or known shipwreck sites, treasure hunters have uncovered historical artifacts, including:
- Gold and silver coins from sunken ships
- Military relics and antique weapons
- Tools, pottery, and trade goods from centuries past
Some of the most famous underwater finds—such as the Spanish treasure fleets or World War II wrecks—have yielded millions in lost valuables and museum-worthy artifacts.
Tools That Make It Possible
Modern waterproof metal detectors allow hobbyists and professionals to search both shallow and deep water with precision. Features like saltwater discrimination, multi-frequency technology, and waterproof headphones make underwater detecting more effective and accessible than ever.
Legal and Ethical Considerations
Before diving in, it’s essential to familiarize yourself with the local laws. Some waters are protected, and any items found may belong to the government, a private owner, or be subject to heritage protection laws. Always research local regulations and, when necessary, obtain permits before conducting any work.
Key Takeaway: Underwater treasure hunting is a real phenomenon. With the right gear, patience, and knowledge, you can uncover everything from modern jewelry to centuries-old artifacts. Please ensure that you respect local laws and treat them with responsibility.
Beach, River, or Ocean? Choosing the Right Detector for Each Environment
Not all waterproof metal detectors are created equal, and choosing the right one depends heavily on where you plan to search. Different environments present distinct challenges, ranging from saltwater interference to fast-moving currents and shifting sands. Here’s how to match your detector to your environment for the best results.
Beach Detecting
Beaches are one of the most popular places for metal detecting, and for good reason. The combination of foot traffic, soft sand, and shifting tides results in a high number of lost coins, rings, and other valuables.
Challenges:
- Wet sand is often mineralized, especially near saltwater
- Constant wave action can shift targets deeper
- Crowded areas can produce a lot of trash signals
Best Features to Look For:
- Saltwater ground balance (if near the ocean)
- Discrimination mode to ignore bottle caps and pull tabs
- Lightweight build for long walks
- Waterproof coil at a minimum; full waterproofing preferred
Top Picks: Minelab Equinox 800, Nokta Makro Simplex+
River Hunting
In some regions, riverbanks and shallow rivers can hide coins, relics, tools, and even gold nuggets. Flowing water often carries valuables downstream, where they settle in gravel beds or crevices.
Challenges:
- Murky water can reduce visibility
- Strong currents can shift you off course
- Rocky riverbeds can snag or damage gear
Best Features to Look For:
- Compact or collapsible design for maneuverability
- Waterproof up to at least 10 feet
- Good target separation to detect among rocks and clutter
- Optional pinpoint mode for fast recovery
Top Picks: Garrett AT Pro, Nokta Makro Legend
Ocean and Diving
Ocean detecting includes both shallow surf and deep-sea diving. These environments are rich with potential finds — from modern jewelry to shipwreck treasure — but they’re also the most demanding.
Challenges:
- High salinity causes false signals without proper settings
- Depth and pressure can damage non-diving-rated gear
- Strong currents and visibility issues
- Corrosive saltwater requires rugged materials
Best Features to Look For:
- Fully submersible detector (ideally 200 feet or more for diving)
- Multi-frequency or pulse induction technology to handle saltwater
- Corrosion-resistant components and waterproof headphones
- Bright colors or reflective parts for better visibility underwater
Top Picks: Minelab Excalibur II, Fisher CZ-21
Key Takeaway: The ideal metal detector varies by location: beaches require saltwater handling and trash discrimination, rivers demand precision and maneuverability, and ocean detection necessitates rugged, deep-diving capability. Select a detector designed for your specific environment to optimize your success and safeguard your investment.
Essential Accessories for Underwater Metal Detecting
Having the right accessories can make your underwater metal detecting trips more efficient, comfortable, and productive. While a waterproof detector is your primary tool, these additional accessories can significantly enhance your experience and increase your success rate.
- Waterproof Headphones are crucial for hearing faint signals underwater, where ambient noise can be overwhelming. Look for models specifically designed for your detector brand and depth rating.
- Scoop or Sand Scoop: A durable, corrosion-resistant scoop (preferably stainless steel or aluminum) helps you recover targets quickly in wet sand, mud, or underwater sediment.
- Pinpointer (Waterproof): A waterproof pinpointer enables you to quickly and precisely zero in on targets. It’s especially useful in murky water or rocky areas.
- Wetsuit or Drysuit: Depending on water temperature, proper thermal gear keeps you comfortable and safe during extended hunts.
- Mesh Finds Bag: A lightweight mesh pouch with a secure closure lets water drain out while keeping your treasures safe and organized.
- Gloves: Neoprene or cut-resistant gloves are the best option if you want to shield your hands from sharp items, rocks, or marine life.
Key Takeaway: The right accessories can enhance your safety, comfort, and recovery speed while underwater detecting. Equip yourself with waterproof headphones, a good scoop, and protective gear to make each trip more effective and enjoyable.
Conclusion
Investing in a waterproof metal detector can unlock countless hidden treasures beneath the surface—if you choose the right one. By understanding your environment and matching it with the right equipment, you’ll boost your chances of making a valuable discovery while enjoying the thrill of underwater exploration.
FAQs
Can all waterproof detectors be used in saltwater?
Not necessarily. Some detectors have trouble with the conductivity of mineralized sand and water, so look for ones made especially for use in saltwater.
How deep can a waterproof metal detector go?
Most models are rated for shallow water (up to 10 feet), whereas scuba-grade units can reach depths of up to 200 feet.
Are waterproof metal detectors good on land, too?
Yes. Many waterproof detectors work equally well on dry land, making them versatile for all-terrain detecting.
Do I need a license to detect underwater?
This depends on local regulations. Always check your country or state’s laws, especially near historic sites or protected waters.
What is the biggest risk associated with underwater detecting?
Losing gear, running into strong currents, or damaging non-waterproof parts. Preparation and safety precautions are key.