10 Best Underwater Metal Detector 2026 in the United States

The MINELAB MANTICORE is a robust underwater metal detector designed for serious treasure hunters. One of its standout features is the Multi-IQ+ technology, which offers 50% more power than traditional models, making it highly effective in various environments. It has an impressive depth rating, allowing detection up to 16 feet underwater, which is great for beach or underwater searches. The inclusion of multiple coil sizes (8”, 11”, and 15”) enhances versatility, catering to both small and deep targets, ensuring you can find everything from coins to jewelry and even gold nuggets.

The advanced target ID system and improved discrimination allow users to differentiate between valuable targets and trash, which is a significant advantage for efficient searching. The detector is designed with user-friendly features like customizable audio controls and backlighting for nighttime use, making it accessible for users at various skill levels.

There are a few considerations to keep in mind. At 3 pounds, it’s lightweight, but some users might still find it a bit cumbersome during extended use, especially in water. The price point could be a drawback for beginners or casual users who may not need the advanced features offered. If you’re a dedicated treasure hunter looking for an all-terrain metal detector with advanced features, the MINELAB MANTICORE is an excellent choice. However, casual beachgoers or hobbyists might find it more than what they need.

The MINELAB MANTICORE Metal Detector Professional Bundle is designed for serious treasure hunters and includes everything you need for a successful hunt. The MANTICORE detector is highly powerful, boasting 50% more power than most models in its class, which allows it to find targets quickly and accurately even in tough conditions. It uses simultaneous multi-frequency technology, making it one of the most advanced detectors available. The 11-inch double D coil is a good size for covering a lot of ground while still being precise.

The waterproof feature is essential for underwater detection, and the IP rating suggests reliable protection against dust and water. The weight of 2.9 pounds and adjustable length make it user-friendly and ergonomic, allowing for extended use without discomfort. The included PRO-FIND 40 pinpointer is a standout addition, offering precise target location with minimal interference, which is especially useful underwater. The universal carry bag is practical for storage and transportation, ensuring that your gear stays in good condition.

A lithium-ion battery is included, offering a decent runtime, though you might need to monitor battery life closely during long sessions. One potential downside is the professional-grade features and price might be more than what a casual user needs. Additionally, its weight, while relatively light, could still become tiring for some users over prolonged uses. This bundle is ideal for dedicated hobbyists or professionals who need a reliable, high-performing metal detector capable of handling various environments, including underwater.

The MINELAB Equinox 900 is a versatile, fully waterproof metal detector designed to handle a variety of environments, including underwater searches up to 16 feet deep. It stands out with its multi-frequency technology, operating at 5 KHz along with other frequencies, which helps balance sensitivity and depth detection for different target types. This detector offers four preset modes—Park, Field, Beach, and Gold—that make it easier to adjust settings based on the type of terrain or targets you’re after. Its EQX 6 coil is waterproof and smart, improving accuracy and making it easier to discriminate between trash and valuable finds.

The device provides a high-resolution target ID, allowing you to better identify what you’re detecting, and includes features like a built-in flashlight and vibration feedback to keep you searching comfortably in low-light conditions. Weighing only 2.8 pounds and featuring a collapsible carbon-fiber shaft, it’s lightweight and portable, which is a plus if you plan to carry it around for extended periods. While its frequency and coil size are well-suited for general use, extreme deep-water or highly mineralized ground might challenge its performance compared to specialized detectors.

For casual to serious treasure hunters who want a reliable, easy-to-use metal detector that works well in water and on land, the Equinox 900 delivers excellent flexibility, precision, and portability.