10 Best Underwater Metal Detectors 2026 in the United States

The Minelab Equinox 900 is a versatile metal detector well suited for underwater treasure hunting and general detecting. Its standout feature is the Multi-IQ technology that simultaneously uses five frequencies, improving sensitivity and target identification across various metals and soil types. This makes it reliable both underwater and on land. The 11" waterproof double-D coils provide a good balance between coverage and target separation, which helps detect objects at reasonable depths. With an IP66 rating, it can handle water exposure well, making it suitable for shallow underwater use, though not for deep diving.

Its discrimination features and 119 target IDs help differentiate valuable finds from junk, which is helpful in trash-heavy areas. The detector offers several modes (Park, Field, Beach, Gold) tailored for different environments, including wet sand and shallow water. Battery life is solid thanks to a built-in rechargeable lithium-ion pack, supporting extended use without frequent recharging. Weighing about 2.8 pounds and featuring a collapsible design with a padded carry bag, it’s comfortable and portable for long detecting sessions. The included waterproof PRO-FIND 40 pinpointer also assists in precisely locating targets underwater or on land.

While the detector is excellent for shallow water and wet environments, it’s not rated for deep diving or prolonged submersion. Priced at a higher point, it might be more suited to serious hobbyists than beginners. The Minelab Equinox 900 is a feature-rich, user-friendly detector that excels in versatility and underwater use up to moderate depths, making it a strong choice for anyone looking to explore both land and shorelines with confidence.

The Garrett Vortex VX9 is a solid choice for anyone interested in underwater metal detecting, as it can be fully submerged up to 16 feet, making it suitable for lakes, streams, and ocean searches. Its 8.5” x 11” coil provides a good balance between coverage area and precision, helping you find small treasures without missing larger items. With seven frequency options ranging from 5 to 25 kHz, it offers flexibility to adjust to different water conditions and target types, which is important when hunting in varying mineralized soils.

The detector is lightweight at just under 3 pounds, and its ergonomic design with a collapsible shaft makes it easy to carry and store. It features a built-in rechargeable lithium-ion battery that lasts up to 15 hours, which is convenient for extended outings without worrying about changing batteries. The controls are straightforward, featuring adjustable sensitivity with 8 levels and a three-tiered target ID that helps differentiate between types of metals, though some beginners might need a bit of practice to master the settings.

While the listed weight including accessories might be around 5 pounds, which could feel noticeable during long sessions, the detector’s combination of depth capability, frequency options, and solid battery life make it a dependable choice for hobbyists focused on underwater treasure hunting. Its versatile ground balance settings can handle tricky soils, making it suitable for users with some experience.

The Nokta Makro Invenio is a high-end underwater metal detector designed to find deep treasures and hidden cavities underwater and underground. Its standout feature is the use of Artificial Intelligence, which helps the device deliver precise shape recognition and accurate depth readings, making it easier to identify valuable targets. It offers several search modes to match different skill levels and conditions, including specialized modes for ground anomalies like caves or tunnels.

The detector is well-protected with an IP67 rating, meaning it’s suitable for underwater use and can handle being submerged. The device is aimed at serious treasure hunters looking for deep detection capabilities beyond typical detectors. The Invenio is quite heavy at 40 pounds, which might make it less comfortable for extended use, especially underwater. Its adjustable length helps with ergonomics but doesn't fully offset the weight.

It uses two lithium polymer batteries included with the device. For someone focused on serious underwater treasure hunting who values precision and depth over portability, the Invenio offers advanced tech and solid performance. For casual users or those needing a lighter option, this might feel bulky and demanding.