Submerge and Detect: A Guide to the Best Underwater Metal Detectors

Have you been thinking of buying an underwater metal detector? In this article you will learn to see between the underwater metal detector and a waterproof metal detector. You will understand how they differ from each other and what they can and can’t do. What is the difference between Pulse Induction and VLF. There is a separate section containing rating of the best metal detectors for both beach and underwater hunting.

Do you know?

Underwater metal detector and metal detector for beach hunting isn’t it one and the same thing.

First of all, you have to understand that all metal detectors are conventionally divided into underwater ones (those that you can completely drown into the water up to 70 meters deep and the ones that can function in a brackish water) and waterproof metal detectors that are used for coastal and beach treasure hunting (such detectors can be put up to 5 meters deep into water and they demonstrate poorer productivity in brackish water).

Waterproof metal detectors vs underwater metal detectors

The terms “waterproof metal detectors” and “underwater metal detectors” are often used interchangeably, but they can have nuanced differences based on their intended use and design features.

Here’s a breakdown of each:

Waterproof Metal Detectors

  1. General Use: Waterproof metal detectors are designed to withstand exposure to water, but they are not necessarily intended for complete submersion. They can handle wet conditions, rain, or shallow water use.
  2. Water Resistance Ratings: These detectors often come with water resistance ratings, such as IP67, indicating the level of protection against dust and water. The first digit in the rating represents dust resistance, and the second digit represents water resistance.
  3. Typical Applications: They are suitable for use in damp environments, wet grass, beaches, or shallow water, but they are not built for diving or full immersion.

Underwater Metal Detectors

  1. Submersible Design: Underwater metal detectors are specifically designed to be fully submersible in water. They can be completely immersed in water, typically up to a specified depth.
  2. Waterproofing Standards: They often meet higher waterproofing standards, allowing users to take them underwater for extended periods without damage.
  3. Diving Capability: Underwater metal detectors are suitable for activities such as scuba diving, snorkeling, or underwater treasure hunting in lakes, rivers, and oceans.


  • Depth Rating: When choosing a waterproof or underwater metal detector, it’s essential to consider the depth rating. This indicates how deep the detector can safely operate underwater without compromising its functionality.
  • Intended Use: Consider your specific needs. If you plan to detect in shallow water or wet conditions, a waterproof detector might suffice. For more extensive underwater activities, including diving, an underwater detector is more appropriate.
  • Durability: Both types should be durable, but underwater detectors are generally built with more robust materials to withstand the pressure and conditions encountered during submersion.

You should make this decision after making your mind as for where you are going to go treasure hunting – on the beach and around coastal area or deep under water. Most of treasure hunters dive not that deep, since all gold and silver jewelry that people loose in water is usually located in a coastal area.

If your task is to go around the beach, search not far from it and you will maximum get waist-deep under water, you should get a metal detector for beach hunting. But if you’ve decided to become a professional underwater treasure hunter, you should turn your attention to a professional underwater metal detectors.

For underwater treasure hunting you will need a PI metal detector. It performs better on a sandy beach and brackish water, easily tunes out of noise. However, these detectors aren’t as sensitive as VLF detectors and they don’t search that deep.

Best waterproof metal detectors

Minelab Equinox 800

Minelab Equinox 800 review

Minelab Equinox 800 is a multi-purpose metal detector meant for various types of treasure hunting. The device is equipped with three manufacturer’s programs for beach hunting as well as for working in fields and parks. It is aimed for treasure hunting both on the ground and under water (waterproof up to 3 meters deep).

Equinox 800 has more operation frequencies, it can work at 5\10\15\20\40 kHz frequencies and Multi-IQ (using several frequencies at the same time).

Beach mode is used for underwater treasure hunting. It has two sub-modes – wet/dry sand and under water/shallow water.

Best Choice No. 2
MINELAB Equinox 800 Multi-Frequency Waterproof Metal Detector for Adults with EQX 11″ Double-D Smart Coil (4 Detect Modes,…
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Last update on 2024-07-06 / Affiliate links / Images from Amazon Product Advertising API / Source: Amazon Affiliates

ModelMinelab Equinox 800
ApplicationCoin, Relic, Jewellery & Beach
TechnologiesMulti-IQ, Wi-Stream, Bluetooth
Weight1.34 kg (2.96 lbs)
Length (Adjustable)1440 mm (56.7″)
BatteriesIn-built Lithium-ion
Headphones Included, bluetooth and aptX™
Audio OutputIn-built loudspeaker, 3.5 mm (1/8″) headphones
Warranty3 years
Operating Principle VLF
Standard Searchcoil11-inch Double-D
Operating Frequencies (kHz) Multi, 5, 10, 15, 20, 40
Water resistanceWaterproof
Submersion Depth up to 3m/10-feet
Visual DisplayMonochrome LCD with backlight
Noise CancelYes
USB ConnectivityYes (Windows and OSX)
Ground Balance Auto, Manual
Search Modes Park, Beach, Field, Gold
Discrimination50 segment (Ferrous: -9 – 0, Non-ferrous: 1 – 40)
Custom Search Profiles8 (2 per Detect Mode)
Noise CancelAuto, Manual (-9 to 9)
Audio Threshold Yes
Target Volume0–25
Threshold Level0–25
Threshold Pitch0–25
Target Tones1, 2, 5, 50
Electronic Pinpointing Yes
VDI (0 to 99 scale) Yes
LCD BacklightYes

XP Deus II – best submersible metal detector

XP Deus II review

Nowadays it is the best metal detector on the market. XP Deus 3 has accumulated all the best groundwork made by XP during all these years.

XP Deus II is a metal detector designed in 2022 that is one of the best multipurpose metal detectors nowadays. It is fast both for ground and underwater metal detecting, with FMF ® technology (fast multifrequency technology), extra lightweight (it weighs just 800 grams), the device is mobile and completely wireless: its control unit, search coil, headset, connection with a pinpointer are wireless. This is the best metal detector model designed by XP.

The most important about this novelty is its own technology, FMF – Fast Multi Frequency. This means the ability of the device operation simultaneously using a multifrequency from 4 to 45 kHz. At that, the frequencies in multi-frequency mode will be selected according to the device operation mode selected.

While XP Deus predecessor was good in many ways but not for beach hunting, XP Deus II can be used not only for beach hunting but the device also can be submerged up to 20 meters deep!

For underwater treasure hunting, there was designed a bone conduction headset that allows for hearing the weakest signals. Vibration mode was also added to the headset features.

Moreover, XP Deus II is a multifrequency device that efficiently searches both large-sized targets and small gold nuggets for which it has a special program, «Goldfield»

XP Deus II is as light weight as possible (it weighs 815 g max), which means that the device is very convenient in use. Since we all know how hard it is to sweep with any other device and then your hand starts aching. Now these issues are settled and you can enjoy using this metal detector.

Deus II is quickly assembled and dismantled and at that there is no chance of loosing or breakage of any device’s components. The metal detector has embedded batteries with at least 2 years term of service and then you should replace them with new ones. The batteries high capacity ensures very long service term without recharging.

XP Deus II can be considered the most light-weighted, ergonomic, and multipurpose metal detector with the highest efficiency when searching for any targets under any conditions. It is obvious that here we have a really new device, not just a veiled upgrade of the previous device model.

Best Choice No. 1
XP Deus II RC Metal Detector – 22 FMF Coil (9″) – for Treasure and relic Detection – for All Terrain, XP Deus II Remote…
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Last update on 2024-07-06 / Affiliate links / Images from Amazon Product Advertising API / Source: Amazon Affiliates

Total detector weight with batteries750-815 g
Stem weight370 g (S-Telescopic) – 305 g (S-Telescopic lite)
Remote weight with battery150 g
Headphone weight with batteryWS6: 82 g – WSA II: 72 g – WSA II XL: 250 g
Coil weight22.5 (9’’) – 345 g; 28 cm (11’) – 470 g; 34×28 cm (13’’x11’’) – 570 g
StemFully telescopic, S-shaped
Length of folded stem58 cm
Length of extended stem130 cm
Wireless coilsDD 22.5cm-9’’/28 cm-11’’/34x28cm-13’’x11’’ (fully waterproof 20m – 66 ft)
Operating T°0 to + 40°C
Max ambient T° during charging0 to + 40°C
Recommended storage T°25°C
CoilIP 68 – 20m – 66 ft
Bone conduction headphonesWaterproof IP68 – 20m – 66 ft (optional)
Wireless Headphones optionalWS6 (rainproof) – WSAII (rainproof) – WSAII XL (IP 68-1m)
BatteriesRemote/Coil: 700 mAh – Headphones: 320 mAh
Battery level indicatorYes: Remote/Headphones/Coil/MI-6
Wireless Remote Control battery life~ 15 to 30H depending on audio output activated
Wireless Headphone battery life~ 15H WSAII/WS6
Wireless Coil battery life8H to 20H depending on programs and frequencies
Mains power chargerDepending on version, Input 100-220V 50/60Hz, Output 5V- 1A max
Charging time~3 h
Software updatesYes, by USB/Internet connection
Hip mount remote control caseYes
Headphones storage caseYes (WS6, WSA II)
WarrantyFive years parts and labor. Batteries, chargers and connectors have a 2 year
Detection frequenciesSimultaneous Multi Frequency or between the 49 single
frequencies from 4 to 45 kHz
Sensitivity99 levels
Sound typeDifferent sound options: PWM, SQUARE
Audio Volume10 levels for each audio output
Reactivity9 levels (0/0.5/1/1.5/2/2.5/3/4/5)
Audio Response8 levels
Iron Volume6 levels
Multi Tones 1, 2, 3, 4, 5, Pitch and Full Tones 1 and 2 + EXPERT modes
Ground balanceTracking, Grab, Manual
Multi-NotchYes, with adjustable window width
PinpointYes, with and without Autotune – Audio and visual
DiscriminationAudio and visual/ferrous bottle cap rejection on 5 levels/Silencer
ThresholdThreshold and Audio frequency adjustable
Equalizer4 Bands configurable
Programs12 factory programs + 12 users
Backlight20 levels adjustable, very low power consumption

Best underwater metal detectors

Nokta PulseDive – best scuba metal detector

Nokta PulseDive review

This is a multi-purpose device designed by Nokta Makro that includes a pinpointer and scuba pinpointer.

The device is a transformer pinpointer, which is an underwater metal detector and a pinpointer for ground search at the same time. How is this possible? Well, it is pretty simple. Nokta PulseDive has a special search mono coil that can be attached to the device, and then it is used for deep underwater treasure hunting.

The Nokta PulseDive uses a PI approach, and its operating frequency is 3 kHz, which makes the device utterly unaffected by brackish water or highly mineralized soils. Such technology ensures more stable device performance in brackish water or on any soil type.

Best Choice No. 1
Nokta PulseDive Underwater Metal Detector, Waterproof Pinpointer 2-in-1 Set for Adults with 5.5 Inch Search Coil, 3 kHz Pulse…
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Best Choice No. 2
Nokta PulseDive Scuba Metal Detector, Pulse Induction 8″ Coil, Frequency 3kHz, Black
  • Waterproof up to 60m (200ft.)
  • Compatible with Nokta 2.4 GHz Green Edition Wireless Headphones.
  • Lightweight & rugged with audio, LED light and vibration alerts!

Last update on 2024-07-07 / Affiliate links / Images from Amazon Product Advertising API / Source: Amazon Affiliates

ModelNokta PulseDive
Operating PrinciplePulse Induction
Operating Frequency3kHz
WaterproofUp to 60 m (200 ft.)
Detection ModesAudio / Vibration / Audio + Vibration / LED
Sensitivity5 levels adjustable
Length28 cm (11”)
Weight286 gr (10oz) including the hard-shell case
Battery1650mAh Lithium Polymer
Charging Time≈2 hours
Warranty2 years

Minelab Excalibur II – professional underwater metal detector

Minelab Excalibur II review

This is a classical submersible metal detector for underwater treasure hunting. We can’t even count how many treasures and troves were found by means of it. This is a time-proven and very quality metal detector and after buying it you can go underwater treasure hunting right away. Excalibur II is considered to be the most best underwater metal detector and I guess you won’t find anyone who will argue with this.

You can dive up to 60 meters deep with it; it has a highly efficient discriminator which can see between ferrous and non-ferrous metals.

This metal detector uses a unique technology of broad band scanning (BBS) that works with 17 frequencies simultaneously in the range from 1.5 kHz to 25.5 kHz. The device has a pin pointer by means of which you will identify the target center. The metal detector has Koss waterproof headphones in its set and a lot of other stuff.

We should mention that Excalibur 2 uses the technology of signal amplification by the coil (RCB). The coil with RCB technology amplifies any weak signals from small objects or deeply resting ones; due to its design the coil simultaneously suppresses interference and false signals.

The metal detector case color is bright and fluorescent, due to which you won’t loose track of it in muddy water. The device has S-shaped shaft and it is more convenient to use for underwater treasure hunting than a straight one.

The device is powered by eight AA batteries or by accumulator; its capacity is quite large – up to 1000 Ah. Though the metal detector weighs 2.5 kg, you all know that things become lighter under water.

Best Choice No. 1
Minelab Metal Detectors Excalibur II 1000 Underwater Detector Bundle, 10 inch Search Coil, Deluxe Carry Bag
  • Minelab Excalibur II 1000 Metal Detector Bundle (2) Items:
  • Minelab Excalibur II 1000 Metal Detector Bundle
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Minelab Excalibur II 1000 Waterproof Detector Bundle with Pro Find 35
  • The unique design of the Minelab Excalibur II allows you to use it as…
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  • Features: BBS 17 frequency technology (1.5kHz 25.5kHz), RCB amplifies weak…

Last update on 2024-07-07 / Affiliate links / Images from Amazon Product Advertising API / Source: Amazon Affiliates

ModelMinelab Excalibur II
ApplicationCoin, Relic, Jewellery, Beach & Dive (waterproof 200ft)
Weight8″ Coil 2.1 kg (4.6 lbs) or 10″ coil 2.3 kg (5.1 lbs) (inc NiMH battery)
Length (Adjustable)Standard shaft 1140 mm – 1220 mm (45″ – 48″); Dive shaft 820 mm – 910 mm (32″ – 36″)
BatteriesNiMH battery pack 13V 1000 mAh
Headphones Included, Koss 8, hardwired
Warranty1 year
Operating Principle VLF
Standard Searchcoil10″ Double-D hardwired
Operating Frequencies (kHz) Multiple frequencies: 1.5, 3, 4.5,…25.5kHz)
Water resistanceUnderwater metal detector
Submersion Depth waterproof 200ft
Discrimination Variable Discrimination (adjustable turn control) & All Metal
Ground Balance Automatic ground rejection
Detect ModesDiscriminate or All-Metal (Pinpoint)
Target Volume AdjustAdjustable turn control
Audio Threshold Adjustable 
Electronic Pinpointing Yes
VDI (0 to 99 scale) No
Build-in flashlightNo

Garrett Sea Hunter Mark II – best deep water metal detector

Garrett Sea Hunter Mark II review

Sea Hunter Mark II is a professional underwater metal detector made by American company Garrett. You can put Sea Hunter Mark II up to 65 meters deep into the water. Waterproof headphones and straps to fasten the device to a diving suit come in the device set.

The settings are quite simple and flexible at the same time – these are discrimination, threshold tone and sensitivity.

The device design is rather ergonomical – the control unit can be fastened to upper, middle or bottom section of its shaft.

Also you can assemble the metal detector without using the middle shaft for more comfortable hunting at tough conditions.

Sea Hunter Mark II is a metal detector based on PI search technology. Application of this technology allows Garrett Sea Hunter Mark II get an immediate target response.

Best Choice No. 1
Garrett Sea Hunter Mark II Underwater Metal Detector with 2 Search Coils
  • Circuit type: Pulse Induction technology for automatic cancellation of…
  • Audio Threshold, Adjustable: adjust to user’s preference
  • User-adjustable Discrimination/Elimination

Last update on 2024-07-08 / Affiliate links / Images from Amazon Product Advertising API / Source: Amazon Affiliates

ModelGarrett Sea Hunter Mark II
Weight5.1 lbs (2.3 kgs) stem-mounted
Control Housing31 oz (88 kgs)
Length (Adjustable)28″ to 52″ (1.71 m – 1.32 m)
Batteries8 AA (included)
Headphones Submersible headphones included
Warranty1 year
Circuit Type Pulse Induction
Standard Searchcoil8″ PROformance™ mono
Operating Frequencies (kHz) 750 pulses per second, adjustable
Water resistanceUnderwater detector
Submersion Depth 200 feet (65m)
Discrimination Full Range (PI)
Ground Balance Preset
Search Modes 3
Audio Tones1
Audio Threshold No
Detector BuoyancyNear neutral
Updatable SoftwareNo
Electronic Pinpointing No
VDI (0 to 99 scale) No
Build-in flashlightNo