The 13 Best Metal Detectors for Underwater Use in 2026

The Equinox 800 revolutionized detecting by making simultaneous multi-frequency affordable. It runs 5, 10, 15, and 20 kHz at once for consistent performance across target types and ground conditions. Eight customizable profiles let you dial in settings for coins, relics, beach, or gold—then save them for instant recall.

The Equinox 900 refines the 800's formula with Multi-IQ 2 for improved target ID stability and deeper detection. The Control Pod moves key settings to your fingertips, and 5-meter waterproofing extends dive capability. Six single frequencies give more options for optimizing to specific targets or conditions.

The X-Terra Pro delivers full IP68 waterproofing with Multi-IQ+ at a mid-range price. Pro-Switch audio lets you toggle between modes without menu diving, and both single and multi-frequency options give flexibility for different targets. Lightweight at 2.47 lbs, it swings easy during long sessions.

The AT Pro set the standard for waterproof VLF detectors with 10-foot submersion rating and 15 kHz frequency optimized for coins and jewelry. Pro Audio modes provide nuanced target information that experienced hunters appreciate. Manual ground balance handles beach mineralization that trips up preset-only machines.

The ATX uses pulse induction technology that ignores ground mineralization—essential for gold prospecting and saltwater beaches. Military-spec construction survives harsh conditions, and the collapsible design packs into remote locations. Fully waterproof to 10 feet for underwater prospecting in rivers and streams.

The AT Max adds Z-Lynk wireless technology with just 17ms latency—fast enough that audio feels instantaneous. True All-Metal mode bypasses discrimination for maximum depth on deep targets. Enhanced ground balance tracking and backlit display make it the most capable AT series detector for challenging conditions.

The Equinox 700 introduces Multi-IQ 2 with improved target ID accuracy and deeper detection. The Control Pod display moves key info to the handgrip, and haptic vibration feedback helps in noisy environments. Waterproof to 5 meters—deeper than its predecessor—for serious underwater hunting.

Garrett combined their proven AT waterproof platform with an 18 kHz frequency tuned for gold prospecting. Fully submersible to 10 feet, it handles stream and river hunting where gold often settles. The True All-Metal mode provides maximum depth, while Iron Audio helps distinguish gold from mineralization noise.

The Simplex+ redefined value by offering IP68 waterproofing to 3 meters at a budget price point. Built-in rechargeable battery eliminates ongoing costs, and wireless headphone support keeps you cord-free. Nokta's free firmware updates add features over time—a rarity at this price.

Minelab's Manticore represents the cutting edge with 2D target visualization that plots both conductivity and ferrous content simultaneously. The enhanced Multi-IQ+ processor handles complex ground conditions while IP68 waterproofing to 5 meters opens up underwater hunting. High-speed target separation catches coins masked by nearby iron.

The Simplex Ultra upgrades the beloved Simplex+ with simultaneous multi-frequency and more single-frequency options. Still maintains the original's simplicity and IP68 waterproofing while adding serious capability. The rechargeable battery and included wireless headphones make it hunt-ready out of the box.

The Excalibur II remains the go-to detector for serious underwater hunters thanks to its 200-foot depth rating and BBS multi-frequency technology. It handles saltwater mineralization that defeats single-frequency machines, making it equally capable on wet sand, in the surf, or on scuba dives. A proven design that underwater hunters trust.

The Score brings Nokta's SMF multi-frequency technology to an entry-level price point. Waterproof to 5 meters with wireless audio capability, it punches well above its weight class. Simple controls make it accessible for beginners while the technology handles difficult ground automatically.