Best Underwater Metal Detectors (2026): Dive, Snorkel & Surf Picks by Depth Rating

Dive, snorkel and surf detectors, picked by depth rating and by how you actually hunt the water.

By Evan K | Updated September 2026

Underwater is where the best finds hide, because it is where the fewest detectorists can follow. Every summer, swimmers and divers feed lakes, rivers and surf lines a steady supply of gold rings, chains and coins, and cold water keeps them there until someone with the right machine comes along. The same is true at scale on the ocean floor, where surf zones and swim beaches concentrate decades of losses in the first few feet of sand.

This guide covers the underwater metal detectors we actually sell, service and dive with: true dive machines rated to 200 feet and beyond, and the fully submersible multi-frequency detectors that own the snorkel-and-surf zone. If you want the shoreline side of the story, our beach metal detecting guide is the companion read. Prices are current authorized U.S. dealer pricing at Serious Detecting and can change.

Ready to shop?

Browse the full underwater and waterproof metal detectors collection, go straight to scuba and dive detectors (65 ft+), or keep reading for the picks.

Quick Picks: Best Underwater Metal Detectors (2026)

Best for... Pick Why it wins
Best dedicated dive detector Minelab Excalibur II BBS multi-frequency tuned for salt and black sand, sealed to 200 ft (60 m). The saltwater benchmark.
Deepest depth rating Fisher CZ-21 Dual-frequency workhorse rated to 250 ft, with simple controls you can read through a dive mask.
Best dive + land crossover XP DEUS II Fully wireless flagship, waterproof to 66 ft (20 m), that hunts land just as hard. From $799.
Best 2-in-1 scuba tool Nokta PulseDive Pulse induction rated to 200 ft (60 m); switches from 8 in scuba detector to pinpointer. $229.
Best dive-bag recovery tool Groundtech IQ Detect PI recovery tool with Dive Lock, IP68 to 9.5 ft (3 m), stable in salt and black sand. $215.
Best flagship for snorkeling Minelab Manticore Multi-IQ+ and a 2D Target ID map for trashy swim zones, waterproof to 16 ft (5 m).
Best value multi-frequency Nokta Legend 2 Simultaneous multi-frequency, two coils and wireless headphones for $999, waterproof to 16 ft.
Most popular waterline machine Minelab EQUINOX 900 Multi-IQ, two Beach profiles and the biggest user community in the hobby. $999.

Shop by Water Depth

The single most important spec on an underwater detector is its depth rating. Start with the deepest water you will actually hunt, then read the full reviews below.

1Splash and wading

To about 3 ft

Waterproof coil, control box that survives rain and a dunk. Fine for creek wading with the box above the waterline. Not covered by the picks below.

2Snorkel and surf

Fully submersible to 16 ft

The whole machine goes under. Swim zones, surf lines and riverbeds, where most jewelry actually comes off.

Manticore · Legend 2 · EQUINOX 900

3Recreational scuba

To 65 ft and a bit beyond

Recreational dive territory. One detector for dive trips, beach weeks and land.

DEUS II

4Deep dive and salvage

100 ft and deeper

Sealed housings, locked controls and tuning built for salt at pressure.

Excalibur II · CZ-21 · PulseDive

By water: Underwater and Waterproof · Scuba and Dive (65 ft+) · Beach and Saltwater · Dry Land

What "Waterproof" Actually Means Underwater

This is where buyers get burned. "Waterproof" spans everything from a coil that tolerates wet grass to a sealed housing rated for wreck diving, and the wrong assumption floods a control box. Look for an IP68 rating with a clearly stated depth limit, and confirm it covers the whole machine, control box included, not just the coil.

16 ft

Fully submersible class (Manticore, EQUINOX 900, Legend 2)

66 ft

XP DEUS II, the deepest crossover

200 ft

Excalibur II and PulseDive

250 ft

Fisher CZ-21, the deepest we sell

The second thing that separates a true underwater detector from a land machine that happens to be sealed is how it handles salt. Saltwater is conductive and constantly signals to a single-frequency VLF machine. The detectors below solve it two ways: simultaneous multi-frequency (BBS, FMF, Multi-IQ, SMF) that cancels the salt response, or pulse induction (PI) that ignores mineralization almost entirely. In practice that also decides how much tuning you do. Salt water, fresh water and mineralized lake beds each want a different ground balance, and multi-frequency machines handle the adjustment automatically where a single-frequency machine needs it set by hand every time the bottom changes.

Rated depth is not detection depth

The number on the box is how deep the machine can go. How far it reads into the bottom depends on target size, coil and mineralization: in typical underwater conditions, expect coin-sized targets at 8 to 12 in and larger jewelry at 12 to 18 in. A 250 ft rating does not detect deeper than a 16 ft rating; it just survives deeper water.

Underwater Detector Comparison

Every detector in this guide, grouped by the water it is built for. Specs are checked against each manufacturer's published data.

Detector Technology Max depth rating Discrimination Coil Best for
Dive detectors (65 ft and deeper)
Fisher CZ-21 Dual 5 + 15 kHz 250 ft (76 m)
removable control housing
3-tone audio ID, manual ground balance 10.5 in concentric Working divers, deepest rating
Minelab Excalibur II BBS 1.5-25.5 kHz 200 ft (60 m)
whole detector, IP68
Audio discrimination (no display) 10 in DD (hard-wired) Saltwater surf and dive hunting
Nokta PulseDive Pulse induction 200 ft (60 m)
IP68, whole unit
None (all-metal PI) 8 in scuba coil + probe Budget scuba detecting and recovery
XP DEUS II FMF 4-45 kHz 66 ft (20 m)
coil and RC remote
Numeric target ID, iron volume, reactivity 9, 11 or 13 x 11 in (by package) Dive trips plus land hunting
Snorkel and shallow water (to 16 ft)
Minelab Manticore Multi-IQ+ 5-40 kHz 16 ft (5 m)
IP68, whole unit
2D Target ID map, ferrous limits 11 in DD (M11) Flagship snorkel and surf
Minelab EQUINOX 900 Multi-IQ 4-40 kHz 16 ft (5 m)
IP68, whole unit
Target ID, Iron Bias 11 in + 6 in DD All-around waterline hunting
Nokta Legend 2 SMF 4-40 kHz 16 ft (5 m)
IP68, whole unit
99 target IDs, iron filter 11 in + 8 x 5.5 in DD Best value shallow water
Recovery tool
Groundtech IQ Detect Pulse induction 9.5 ft (3 m)
IP68, Dive Lock
None (all-metal PI) 7 in fixed Underwater target recovery

True Dive Detectors (65 ft and Beyond)

Each pick gets an overall score out of 100 and five metric bars: salt stability, discrimination (how well it tells a ring from trash before you dig), detection depth, ease of use and value. Scores are our editorial judgment from field use and customer feedback.

Best Dedicated Dive Detector

1. Minelab Excalibur II - Best Dedicated Dive Detector for Saltwater

BBS, 17 frequencies from 1.5 to 25.5 kHz | Submersible to 200 ft (60 m) | 10 in DD coil | Dive shaft included

Scuba diver in a black drysuit and yellow headphones sweeping a Minelab Excalibur II over a weedy lake bottom
Minelab Excalibur II 1000 with 10 in DD coil, Koss waterproof headphones and dive shaft

Starting at

$1,699.00

Shop Excalibur II

New units are sold out right now. Open-box units carry the same Minelab warranty; call us for availability.

90OVERALL SCORE

Salt Stability 9.5

Discrimination 8.0

Detection Depth 9.0

Ease of Use 7.0

Value 8.0

Pros

  • Submersible to 200 ft (60 m), the whole detector
  • BBS runs 17 frequencies at once, so salt and black sand stay quiet
  • Rotary dials you can work with dive gloves; no screen to fail under pressure
  • Dive shaft included for better coil control near structure
  • 14 to 19 hours per charge on the NiMH battery pod

Cons

  • Audio-only discrimination: no target ID numbers or depth readout
  • Heavy at 5.1 lb, with a hard-wired coil you can't swap
  • 12-month warranty, shorter than most picks here

The Minelab Excalibur II is the machine you see on the harness of nearly every full-time water hunter on busy tourist coastlines. Its Broad Band Spectrum (BBS) platform transmits 17 frequencies from 1.5 to 25.5 kHz at once, which is why it stays stable in the brutal combination of salt and black sand where single-frequency machines chatter. Its stability at depth in the surf zone is still the standard everything else gets measured against.

It is heavy and analog: no display, five rotary dials and continuous audio tones in hard-wired Koss headphones. None of that matters twenty feet down, when it runs quiet over ground that silences other machines, and the missing screen is one less part to fail under pressure. If your hunting is the open ocean (surf lines, tidal cuts, offshore swim bars), this is the machine the conditions were solved for.

Shop the Minelab Excalibur II →

Deepest Rating We Sell

2. Fisher CZ-21 - Deepest Depth Rating We Sell

Dual frequency, 5 and 15 kHz together | Submersible to 250 ft | 10.5 in concentric coil | 2-year warranty

Detectorist in a plaid shirt and cap crouched knee-deep in a grassy creek, sweeping a Fisher CZ-21 across the streambed
Fisher CZ-21 underwater metal detector with 10.5 in concentric coil and control housing

Starting at

$1,579.00

Shop CZ-21

Ships with the 10.5 in concentric coil and submersible headphones.

87OVERALL SCORE

Salt Stability 8.5

Discrimination 7.5

Detection Depth 8.5

Ease of Use 8.0

Value 8.0

Pros

  • Submersible to 250 ft, the deepest rating we sell
  • Transmits 5 and 15 kHz at the same time for real ID in salt
  • Simple touch controls you can read through a dive mask
  • Removable control housing can clip to your belt or BC
  • Submersible headphones included; built in Texas

Cons

  • Three-tone audio ID only, no screen
  • Manual ground balance to learn
  • No wireless audio

Rated to 250 ft, the Fisher CZ-21 has been the working diver's detector for decades. Its dual-frequency design runs 5 and 15 kHz together through Fourier Domain processing, which gives real target ID underwater while keeping wet salt from falsing the machine. VCO no-motion pinpointing lets you mark a target, set the detector on the bottom and dig without losing the signal.

We stock it with the 10.5 in concentric coil, which covers more ground per sweep and reaches a little deeper on open sand, flats and dive bottoms. Manual ground balance takes a few minutes to learn but pays off in iron-trashy freshwater swim areas and old beach fills. If your hunting starts where the boat stops, this is the specialist tool.

Shop the Fisher CZ-21 →

Best Dive + Land Crossover

3. XP DEUS II - Best Dive and Land Crossover

FMF multi-frequency, 4 to 45 kHz | Waterproof to 66 ft (20 m) | Fully wireless | 5-year warranty

Scuba diver swimming low over a green, weedy lake bottom, sweeping an XP DEUS II with its coil just above the bed
XP DEUS II WS6 Master metal detector with 13 x 11 FMF coil

Starting at

$799.00

Shop DEUS II

WS6 Master package. Remote-control packages start at $1,399.

91OVERALL SCORE

Salt Stability 9.0

Discrimination 9.0

Detection Depth 8.5

Ease of Use 6.5

Value 8.5

Pros

  • Waterproof to 66 ft (20 m), the deepest of any crossover machine
  • FMF handles salt cleanly and gives real target ID numbers
  • Fully wireless: no cable to snag on rock or weed
  • Also our best all-around land flagship
  • 5-year warranty

Cons

  • Steepest learning curve on this list
  • For diving you need XP's underwater headphone setup
  • Remote-control packages cost more than the WS6 Master

The XP DEUS II is waterproof to 66 ft (20 m), and XP backs it with a real underwater ecosystem: bone-conduction headphones and wave-guide antennas built for submerged use. Its Fast Multi Frequency (FMF) platform handles salt cleanly, and it is the only machine in this tier that is also our best all-around land flagship.

If you want one detector for dive trips, beach weeks and relic fields, this is it. Choose the WS6 Master package (control from the headphones, from $799) or a remote-control package (from $1,399) if you want the full screen on your wrist.

Shop the XP DEUS II → or browse all multi-frequency detectors.

Best 2-in-1 Scuba Tool

4. Nokta PulseDive - Best 2-in-1 Scuba Tool

Pulse induction | Submersible to 200 ft (60 m) | 8 in scuba coil plus pinpointer probe | Dive Mode lock

Scuba diver sweeping a yellow Nokta PulseDive with its 8 in coil over a sandy, rocky sea floor
Nokta PulseDive yellow pinpointer probe with 8 in scuba coil, lanyard and charging cable

Starting at

$229.00

Shop PulseDive
84OVERALL SCORE

Salt Stability 9.0

Discrimination 4.0

Detection Depth 6.5

Ease of Use 9.0

Value 9.5

Pros

  • Submersible to 200 ft (60 m) for $229
  • Converts from 8 in scuba detector to pinpointer in seconds
  • Pulse induction stays stable in saltwater
  • Dive Mode locks the buttons against water pressure
  • Lost Alarm and a built-in flashlight for murky water

Cons

  • No discrimination: you dig every metal target
  • Less depth than a full-size dive detector
  • Short handheld reach, so you work close to the bottom

Rated to 200 ft (60 m) with pulse induction stability, the Nokta PulseDive converts from a full 8 in-coil scuba detector into a compact pinpointer in seconds. Dive Mode locks the controls against water pressure, and the Lost Alarm sounds after five minutes of inactivity so you can recover it from murky water if it leaves your hand.

As a budget entry into true diving depth, nothing else comes close. Serious dive hunters also carry one as the recovery tool next to a bigger machine: the main detector finds the target, the PulseDive in pinpointer mode gets it out of the hole.

Shop the Nokta PulseDive → or see the PulseDive collection for coils and covers.

Best Dive-Bag Recovery Tool

5. Groundtech IQ Detect - Best Dive-Bag Recovery Tool

Pulse induction, 674 Hz | IP68 to 9.5 ft (3 m) | Fixed 7 in coil | Dive Lock and Ghost mode

Man in a black polo crouching against a cloudy sky, holding out a Groundtech IQ Detect with its round coil toward the camera
Groundtech IQ Detect scuba pinpointer with fixed 7 in round coil

Starting at

$215.00

Shop IQ Detect
82OVERALL SCORE

Salt Stability 8.5

Discrimination 3.5

Detection Depth 6.0

Ease of Use 9.0

Value 9.0

Pros

  • Pulse induction stays stable in salt and black sand
  • Dive Lock stops water pressure from pressing buttons
  • Ghost mode for vibration-only alerts
  • Built-in flashlight and Lost Alarm
  • USB-C charging, about 10 hours per charge

Cons

  • IP68 to 9.5 ft (3 m) only, so it's a snorkel and surf tool, not a deep-dive one
  • No discrimination
  • Fixed 7 in coil

The Groundtech IQ Detect is a pulse induction recovery tool with a fixed 7 in coil, IP68 waterproofing to 9.5 ft (3 m) and a Dive Lock that stops pressure from triggering buttons. Its 674 Hz PI circuit stays stable in saltwater and black sand where VLF pinpointers chatter.

It is not the machine you search open water with. It is the tool that gets the target out of the hole once your main detector finds it, with vibration-only Ghost mode and a built-in flashlight for dark water.

Shop the Groundtech IQ Detect → or browse all pinpointers.

Snorkel and Shallow-Water Detectors (to 16 ft)

Most water hunting happens in the first sixteen feet: the swim zones, surf lines and riverbeds where jewelry actually comes off. Every machine in this tier is fully submersible to 16 ft (5 m) and runs simultaneous multi-frequency, so wet salt sand does not shut it down.

Best Flagship for Snorkeling

6. Minelab Manticore - Best All-Terrain Flagship for Snorkeling

Multi-IQ+ | 2D Target ID map | Waterproof to 16 ft (5 m) | M11 coil | 2.9 lb

Detectorist in a red and black hooded jacket standing in foaming surf on a rocky beach, sweeping a Minelab Manticore
Minelab Manticore metal detector with M11 coil

Starting at

$1,499.00

Shop Manticore
90OVERALL SCORE

Salt Stability 8.5

Discrimination 9.5

Detection Depth 9.0

Ease of Use 7.5

Value 8.0

Pros

  • 2D Target ID map separates rings from bottle caps and pull tabs
  • 50% more transmit power than the EQUINOX series
  • Fully waterproof to 16 ft (IP68)
  • Beach profiles for surf and seawater
  • 3-year warranty

Cons

  • Included ML 105 wireless headphones aren't for underwater use
  • Highest price of the snorkel picks
  • The 2D map takes time to read quickly

Minelab's Multi-IQ+ flagship, the Minelab Manticore, is fully waterproof to 16 ft (5 m), and its target separation is a genuine advantage in trash-heavy swim areas where bottle caps and pull tabs carpet the bottom. If you snorkel the same busy beaches every summer, the Manticore's ID resolution turns more of those maybe-signals into gold.

Our Manticore beach settings guide covers the exact setup.

Tip

Bluetooth doesn't travel through water. When the coil and your head go under, swap the wireless headphones for a wired, submersible set.

Shop the Minelab Manticore →

Best Value Multi-Frequency

7. Nokta Legend 2 - Best Value Multi-Frequency for Shallow Water

SMF plus 4 to 40 kHz | Waterproof to 16 ft (5 m) | 11 in and 8 x 5.5 in coils | Wireless headphones

Detectorist kneeling on a sandy beach holding up a gold ring, with a Nokta Legend 2 and sand scoop beside him
Nokta Legend 2 metal detector with 11 in coil

Starting at

$999.00

Shop Legend 2
89OVERALL SCORE

Salt Stability 8.0

Discrimination 8.5

Detection Depth 8.5

Ease of Use 8.0

Value 9.5

Pros

  • True simultaneous multi-frequency for $999
  • Two coils and wireless headphones in the box
  • Whole detector waterproof to 16 ft (IP68)
  • Light at 2.6 lb
  • Regular firmware updates from Nokta

Cons

  • More settings to learn than an entry-level machine
  • Wireless headphones aren't for underwater use
  • Smaller aftermarket coil selection than the EQUINOX

Waterproof to 16 ft (5 m) with true simultaneous multi-frequency at $999, the Nokta Legend 2 is the budget-smart way into serious shallow-water hunting. The 11 in coil covers open swim beaches; the 8 x 5.5 in coil gets between rocks and around dock pilings. Steady firmware updates keep improving the salt performance.

Full breakdown in our Legend 2 review.

Shop the Nokta Legend 2 → or browse the Legend 2 collection for coils and bundles.

Most Popular Waterline Machine

8. Minelab EQUINOX 900 - Most Popular Waterline Machine

Multi-IQ plus 4 to 40 kHz | Waterproof to 16 ft (5 m) | 11 in and 6 in coils | Two Beach profiles

Detectorist in a brown shirt and beanie walking a grassy coastal path toward the shore, carrying a Minelab EQUINOX 900
Minelab EQUINOX 900 metal detector with 11 in and 6 in coils

Starting at

$999.00

Shop EQUINOX 900
88OVERALL SCORE

Salt Stability 8.5

Discrimination 8.5

Detection Depth 8.5

Ease of Use 8.5

Value 8.5

Pros

  • Two Beach profiles for wet salt sand and the surf
  • 11 in and 6 in coils included
  • Whole detector waterproof to 16 ft (IP68)
  • Biggest user community and coil selection in the hobby
  • Hunts parks and fields just as well

Cons

  • Less ID resolution in heavy trash than the Manticore
  • Legend 2 matches it at the same price
  • Wireless audio isn't for underwater use

Waterproof to 16 ft (5 m), with Multi-IQ, dedicated Beach profiles and the biggest user community in the hobby, the Minelab EQUINOX 900 is the safe, proven pick for waterline and snorkel work. It hunts parks and fields just as happily the rest of the year, and the 6 in coil in the box is handy around rocks and pilings.

Shop the Minelab EQUINOX 900 →

Every Underwater Pick Side by Side

Swipe or scroll sideways to compare all eight →

Minelab Excalibur II
Excalibur II
Fisher CZ-21
CZ-21
XP DEUS II
DEUS II
Nokta PulseDive
PulseDive
Groundtech IQ Detect
IQ Detect
Minelab Manticore
Manticore
Nokta Legend 2
Legend 2
Minelab EQUINOX 900
EQUINOX 900
Award Best Dedicated Dive Detector Deepest Rating We Sell Best Dive + Land Crossover Best 2-in-1 Scuba Tool Best Dive-Bag Recovery Tool Best Flagship for Snorkeling Best Value Multi-Frequency Most Popular Waterline Machine
Overall Score 90 87 91 84 82 90 89 88
Salt Stability 9.5 8.5 9.0 9.0 8.5 8.5 8.0 8.5
Discrimination 8.0 7.5 9.0 4.0 3.5 9.5 8.5 8.5
Detection Depth 9.0 8.5 8.5 6.5 6.0 9.0 8.5 8.5
Ease of Use 7.0 8.0 6.5 9.0 9.0 7.5 8.0 8.5
Value 8.0 8.0 8.5 9.5 9.0 8.0 9.5 8.5
Technology BBS 1.5-25.5 kHz Dual 5 + 15 kHz FMF 4-45 kHz Pulse induction Pulse induction Multi-IQ+ 5-40 kHz SMF 4-40 kHz Multi-IQ 4-40 kHz
Max Depth Rating 200 ft (60 m) 250 ft (76 m) 66 ft (20 m) 200 ft (60 m) 9.5 ft (3 m) 16 ft (5 m) 16 ft (5 m) 16 ft (5 m)
Coil 10 in DD (hard-wired) 10.5 in concentric 9, 11 or 13 x 11 in (by package) 8 in scuba coil + probe 7 in fixed 11 in DD (M11) 11 in + 8 x 5.5 in DD 11 in + 6 in DD
Best For Saltwater surf and dive hunting Working divers, deepest rating Dive trips plus land hunting Budget scuba detecting and recovery Underwater target recovery Flagship snorkel and surf Best value shallow water All-around waterline hunting

Which Underwater Detector Should You Buy?

You dive, full stop

Excalibur II if saltwater beaches and surf are the mission; CZ-21 if you want the deepest rating and simple controls. Add a PulseDive or IQ Detect as your recovery tool; down there, a pinpointer is not optional.

You dive sometimes, hunt land often

The DEUS II is the only machine here that is both a real dive detector and a flagship land machine. One purchase, every environment.

You snorkel, wade and work swim zones

Manticore for the flagship edge in trashy swim areas, EQUINOX 900 for the proven all-rounder, Legend 2 for multi-frequency with change left over for a sand scoop.

Coil size underwater

Resist the urge to size up for depth. A 10 to 11 in coil is the sweet spot underwater, where a bigger coil's extra reach costs you control against current and drag.

The Underwater Hunting Kit

Underwater hunting kit laid out on white: detector with coil and yellow headphones, yellow pinpointer, stainless sand scoop and a black finds pouch

Round out the kit before the boat leaves. In the water, the tools around the detector matter almost as much as the detector itself.

1Sand scoop

Surf and swim zones

A long-handled stainless sand scoop lifts the target out before the next wave fills the hole.

2Recovery pinpointer

Every dive

Visibility drops and targets sink into silt the moment you disturb the bottom. A waterproof pinpointer finds them fast.

3Submersible headphones

When your head goes under

Wireless audio stops working underwater. Use wired, submersible headphones rated for the depth you hunt.

4Weight belt

Stability

A weighted belt keeps you steady while you sweep, so you work the bottom instead of fighting the water.

5Batteries and dive flag

Before you go

Spare batteries in a waterproof container, and a dive flag whenever you work open water.

Still comparing against dry-sand options? The beach metal detecting guide covers the shoreline zones in depth, and our complete metal detector buyer's guide ranks our top picks across every category.

Frequently Asked Questions

How deep can an underwater metal detector go?

Depth ratings run from 16 ft (5 m) for fully submersible multi-frequency machines like the Minelab EQUINOX 900, to 200 ft (60 m) for purpose-built dive detectors like the Minelab Excalibur II and Nokta PulseDive, up to 250 ft for the Fisher CZ-21. Always match the rating to how you actually hunt; pressure at depth is unforgiving.

Can I use a regular metal detector underwater?

Only if it is rated fully submersible, and only to its stated depth. Many detectors have waterproof coils but non-waterproof control boxes, which survive rain but not a dunk. For anything past wading depth you want a machine rated for full submersion, and past 16 feet you want a dedicated dive detector with sealed housings and locked controls. See every rated model in our underwater and waterproof collection.

What is the best metal detector for scuba diving?

The Minelab Excalibur II is the benchmark for serious saltwater diving, with BBS multi-frequency tuned for salt and a 200 ft rating. The Fisher CZ-21 is the deepest-rated machine we sell at 250 ft. The Nokta PulseDive is the strongest budget entry, converting between scuba detector and pinpointer for $229.

Pulse induction or multi-frequency for underwater hunting?

Multi-frequency (BBS, FMF, Multi-IQ, SMF) gives you target ID, so you can tell a ring from a bottle cap before digging: the right choice where trash is heavy. Pulse induction ignores salt and mineralization almost completely and punches deeper on small gold, at the cost of discrimination. Dedicated divers often carry both: a multi-frequency main machine and a PI recovery tool.

Do I need a pinpointer underwater?

More than on land. Visibility drops, targets sink into silt the moment you disturb the bottom, and every extra minute at depth costs air. A waterproof recovery tool like the Groundtech IQ Detect or the PulseDive in pinpointer mode is standard kit for underwater hunters.

What is the best metal detector for ocean detecting?

Ocean hunting is the hardest test a detector faces: salt is highly conductive, wave-churned sand is heavily mineralized, and the machine is often fully submerged. The Minelab Excalibur II is the benchmark, with BBS multi-frequency tuned for salt and black sand and a 200 ft rating. The Fisher CZ-21 handles the same conditions with dual-frequency stability and goes deeper at 250 ft. For snorkel and surf work rather than open-water diving, the Manticore and EQUINOX 900 are fully submersible to 16 ft and hold a stable target ID on wet salt sand.

How deep can an underwater detector actually detect?

Two different numbers get called "depth," and separating them saves buyers real money. The rating on the box is how deep the machine can go: 16 ft, 66 ft, 200 ft. Detection depth is how far into the bottom it reads, and that depends on target size, coil and mineralization. In typical underwater conditions expect coin-sized targets at 8 to 12 in and larger jewelry at 12 to 18 in. A 250 ft rating does not detect deeper than a 16 ft rating; it just survives deeper water. Our how deep do metal detectors go guide explains why.

What is the best underwater metal detector for gold?

In open water, "gold" usually means jewelry (rings and chains lost in swim zones), and the machines that find it are the ones with target ID strong enough to pick a 14K band out of bottle caps: the Excalibur II, Manticore and EQUINOX 900. For small natural gold in submerged creeks and mineralized water, pulse induction is the stronger tool; the PulseDive holds full sensitivity where VLF machines fall silent. For dedicated prospecting gear, see our gold detectors guide and gold detectors collection.

Final Recommendation

For serious saltwater diving, choose the Minelab Excalibur II; for the deepest rating, the Fisher CZ-21. If you want one detector for dive trips and land, the XP DEUS II. For snorkeling and surf, the Manticore, EQUINOX 900 or Legend 2. And whatever you choose, take a recovery tool: the PulseDive or IQ Detect.

We ship detectors daily from our Michigan warehouse, we're authorized dealers for Minelab, XP, Nokta, Garrett and Fisher, and we answer phones and emails from real water hunters. Tell us where you dive or wade and we'll help you pick.

Shop Underwater Detectors

View all Underwater & Waterproof Metal Detectors →

Authorized U.S. dealer pricing and full manufacturer warranties. Call (844) 771-0707 or email support@seriousdetecting.com for a second opinion.

Jump to a model: Excalibur II · CZ-21 · DEUS II · PulseDive · IQ Detect · Manticore · Legend 2 · EQUINOX 900

Related Buying Guides

About the Author

Evan K is a detectorist who hunts Great Lakes swim beaches, rivers and surf, and writes detector buying guides for Serious Detecting, an authorized dealer for Minelab, XP, Nokta, Garrett and Fisher. The team answers the phone at (844) 771-0707 and would rather talk you into the right detector than sell you the wrong one.

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