10 Best Underwater Metal Detector 2025 in the United States

The GreenRex Metal Detector is designed for adult users who are serious about metal detecting, featuring five professional detection modes that help in precisely identifying various types of metals including coins, relics, jewelry, and gold. The device boasts an upgraded DSP chip and auto-balance technology, allowing it to detect metals up to a depth of 7 inches.

The large, backlit LCD screen is 50% bigger than standard ones, making it easy to read even in low-light conditions, and the ergonomic handle provides comfort for extended use. Additionally, its telescoping rod and quick assembly make it a convenient choice for both travel and storage. The IP68 waterproof coil is ideal for shallow water detection, though users should note that the control box is not waterproof.

It includes useful accessories like premium headphones, a foldable shovel, and a carrying bag, enhancing its value for those who frequently travel or camp. However, at 6.1 pounds, the device might feel a bit heavy for prolonged use. While the GreenRex Metal Detector is packed with features and adjustable for different users and conditions, its weight and non-waterproof control box are points to consider. This metal detector is an excellent choice for those looking for a reliable and versatile tool for underwater and beach metal detecting.

The DR.ÖTEK Metal Detector for Adults is geared towards both professional and hobbyist metal detecting enthusiasts. One of its strengths is its versatility with five upgraded modes, including a unique Memory Mode that helps you focus on detecting a specific metal type. This can save considerable time during searches. The large LCD display with backlight is easy to read and customizable, adding to its user-friendliness in various lighting conditions.

The 9.8-inch waterproof coil is a standout feature, allowing searches up to 10 inches deep and performing well in shallow water, making it suitable for beach outings or riverside adventures. The adjustable stem and 5-level sensitivity settings enhance comfort and effectiveness for users of different heights and experience levels. The device is lightweight at 2.2 pounds, promoting ease of use over extended periods without causing fatigue.

Accessories like a premium headset, digger shovel, and carrying bag add value and convenience, making this a thoughtful gift option. It's worth noting the operating frequency of 7 KHz, which is suitable for general metal detection but may not be as effective for detecting fine gold in mineral-rich soils. Additionally, the reliance on a 9V battery may require frequent replacements, depending on usage levels. Despite these minor drawbacks, the DR.ÖTEK Metal Detector offers a robust combination of features, especially for those looking to balance performance with ease of use.

The Gbnryg Metal Detector offers a promising set of features for both beginners and experienced treasure hunters. Its 12-inch coil is designed to cover a larger area, making searches more efficient. The IP68 rating ensures the coil is waterproof, allowing for shallow water searches, though the controller itself is not waterproof. This means it’s great for beach and shallow water use, but not suitable for fully submerged underwater metal detecting.

The device incorporates a new DSP chip that enhances accuracy and stability, which is useful when trying to locate objects up to 15 inches underground. It operates on a 9 KHz frequency which is decent for general metal detection but might struggle with very small targets or highly mineralized soils. With 5 detection modes, users can tailor their search for different types of metals, making it versatile for finding coins, jewelry, and gold. The discrimination mode is handy for filtering out unwanted metals, and the pinpoint mode helps in accurately locating the target, saving time.

The backlit LCD display, ergonomic design, and adjustable length enhance ease of use and comfort, which is a plus for extended search sessions. The included accessories like batteries, headphones, and a digger add value, making it a ready-to-go kit. However, the weight of 2.8 pounds might be a consideration for prolonged use, especially for younger users. To sum up, this metal detector is well-suited for hobbyists and enthusiasts who enjoy beach and shallow water metal detecting, although it may not meet the needs of those looking for a fully submersible underwater detector.