Minelab Excalibur II Review: Still the Best Underwater Detector? (2026)

Disclosure: Some links in this article are affiliate links. We may earn a commission on qualifying purchases at no extra cost to you.

Not universally, and that qualification is the review. The Minelab Excalibur II is still the only current full-size hobby detector that pairs a 60 m / 200 ft waterproof rating with genuine multifrequency ferrous discrimination. Above the surf line it loses on weight, interface and price; from roughly 20 to 60 metres below it, the shortlist of alternatives is nearly empty, as the current underwater detector rankings make plain.

The split is depth, not brand loyalty. Someone who wades to knee depth and works a towel line at low tide is buying ergonomics, target information and sweep endurance. Someone who dives is buying pressure integrity, saltwater stability and the ability to reject iron without excavating everything. The Excalibur II optimises hard for the second job and accepts real penalties on the first.

It also carries the weaknesses of a long production run: a hardwired coil, hardwired headphones, a 5.1 lb frame, no screen of any kind, and cable jackets on older units that owners report cracking with age.

The Excalibur II remains the reference full-size detector for genuine scuba work down to 60 m, and the only machine in that band that discriminates iron in the water. If your hunting never goes below snorkelling depth, a fraction of the money buys something far lighter and far more capable. Check the Minelab Excalibur II on Amazon.

Minelab Excalibur II: Overview

The Excalibur II runs on BBS, Minelab's Broad Band Spectrum platform, transmitting and analysing 17 frequencies at once. That distinction matters because BBS is an induction-balance multifrequency system, not pulse induction. It answers salt and mineralisation with frequency diversity rather than with a single high-power pulse and no discrimination. Both approaches cope with conductive ground; only one of them tells you something useful about the target before you dig.

Two modes cover the entire interface: All Metal and Discriminate. Inside Discriminate, a single variable control sets how much of the low-conductivity range gets rejected, and the response comes back as continuous multi-tone audio rather than a number. There is no target ID, no depth readout, no iron-bias setting and no notch editing, because there is no screen to carry any of it. Sensitivity runs on Auto or manual levels 1 through 10.

Ground rejection is automatic as part of the BBS design, and the current official specification lists no manual ground-balance control. That is a real change of habit for anyone raised on detectors with a balance knob, and the payoff is a machine that never needs re-tuning as the tide moves the ground under it. It also means one fewer sealed control, which is the theme that runs through the whole design.

Positioning is unambiguously premium and unambiguously specialist. This is not a detector for a detectorist who wants one machine for the park, the pasture and the beach. It is a second machine bought for one job.

Specs & What's in the Box

The current US package, SKU 3303-0124, ships as a complete underwater system rather than a detector you build up:

• Detector and control assembly with hardwired 10-inch Double-D Smart coil
• Hardwired waterproof Koss headphones, nominal 8 ohm
• Standard land shaft and a shorter dive shaft
• 12 V / 1,000 mAh rechargeable NiMH battery pack and charger

The dive shaft is the part buyers overlook. It shortens the rig to roughly 82 to 91 cm for scuba, against 114 to 122 cm on the standard shaft, which is the difference between sweeping comfortably at depth and dragging a long stem through the water beside you.

Stated runtime is approximately 14 to 19 hours from the NiMH pack, and Minelab still lists platform accessories including a Hip Mount Kit, rubber teardrop coil washers and an Ikelite charger adapter. Operating range is listed at 0 to 45 °C with storage from −20 to 40 °C, worth knowing if the machine lives in a vehicle between dive trips.

Two absences define ownership more than anything in the box. There is no interchangeable coil connector, and no modern battery ecosystem. The coil lead runs into a sealed housing, and the pack is a specific 12 V NiMH unit rather than a swappable lithium cell. The economics of proprietary packs are covered in our guide to metal detector batteries and replacements: cheap to live with while they hold capacity, expensive the day they stop.

The Version Question: 8-Inch vs 10-Inch and the Current SKU

Plenty of Excalibur material in circulation still shows an 8-inch package. That was a real configuration. It is not the machine Minelab sells in the US today.

The series started in 1993, and the 800 and 1000 ran until December 2007. Reconstructing exactly what changed with the II is awkward, because Minelab published no version-by-version change log. What owners and dealers recorded at the time was a higher-visibility body, the Slimline coil generation, a revised rechargeable battery arrangement, altered headphone cabling and extra electronic and RF shielding. Those are period observations rather than an official release note, and they are worth treating as such.

Two practical points follow. First, the current US specification exposes only the hardwired 10-inch coil, so a listing advertised as a new 8-inch Excalibur II is not the current package. Second, SKU identifiers are not global: European retail material has used 3303-0107 for the same family. Confirm the coil size and the wiring before assuming two listings describe the same detector.

Availability is genuinely uneven. Minelab's own pages have contradicted each other on this model's stock status, and the honest read is a current product with fluctuating retail supply. If you need one for a booked trip, verify stock before planning around it.

Build Quality & Durability

The argument for the Excalibur II's construction is simple: fewer places to leak. Rotary controls, a potted housing, a hardwired coil and hardwired headphones remove every underwater connector from the chain. Nothing unplugs at depth because nothing unplugs at all. That is why divers who have flooded cheaper machines keep coming back to this platform.

The argument against it is what happens as those sealed components age.

Owners reporting on machines in 2025 and 2026 have described coil and headphone cable jackets cracking, fraying and in some cases exposing conductors. This is the first thing to inspect on a used Excalibur, because the whole system is implicated. The cable feeding the coil passes into a sealed housing, so a damaged lead is a specialist repair, not a coil swap. On a detector with an interchangeable connector you unplug one coil and fit another. Here you either ship the machine out or live with the fault.

The rest of the aging checklist is the same in character. O-rings and seals degrade and belong on a preventive replacement schedule rather than a reactive one. Battery tubes and cells on older units crack and weaken. The control knobs sit exposed on the housing, and knob guards or sturdier replacement knobs have been a standard owner modification for years.

Weight belongs in this section too. At 2.3 kg / 5.1 lb the Excalibur II is close to twice the mass of a modern simultaneous multi-frequency detector, and the published figure understates the issue because handling depends on where that mass sits. Owners consistently describe the factory layout as poorly balanced and rework the shaft rather than the detector. The warranty is also thin next to the field: 12 months from Minelab, against two years on the Fisher CZ-21 and three years on most current land machines. When something does fail out of warranty, the reasoning in our metal detector repair guide applies with extra force, because the two most failure-prone components are the two you cannot swap at home.

Performance: Saltwater, Depth and Discrimination

Saltwater is where BBS earns its reputation. Seventeen simultaneous frequencies give the machine enough conductivity information to hold a stable threshold over wet salt and mineralised sand without the operator chasing a ground balance, which is exactly what a diver cannot do with a knob at 30 metres. Black sand is handled well too, though that is the one ground type where a pulse induction machine can still out-reach it.

Discrimination is the second half of the story, and the reason owners tolerate the weight.

Discriminate mode rejects the low-conductivity end of the range and reports what is left as continuous multi-tone audio. There is no number and no icon, so you learn the machine by ear: a steady repeatable tone on a pass is a dig, a broken or one-way response is not. It is the same skill set described in our breakdown of discrimination and target ID, minus the visual confirmation modern detectors add. Underwater, the upside is that there is nothing to read through murk or glare.

Tuning is more sensitive than the bare spec suggests. One experienced owner's published surf setup runs sensitivity around 3 in turbulent saltwater and notes falsing climbing sharply as it is pushed higher. The general lesson holds in moving salt: a stable low setting beats a hot one, because a detector that chatters loses more than it gains.

Depth capability resists universal numbers. Reach depends on target size, shape, orientation, seabed composition, mineralisation and sweep technique, and no single figure survives all of them. What can be stated is the structural advantage of the platform in salt, and the structural limit of an audio-only interface: with no depth indication, recovery technique in the water carries more of the workload than it does on land.

The list of what is absent is long. No display, no depth indicator, no backlight, no vibration, no wireless audio, no noise cancel, no iron bias, no notch editing. Volume is adjustable, though ferrous volume itself is fixed. It is worth being blunt rather than romantic about this. The simplicity is a genuine advantage at depth. It is also a limitation the moment you hunt anywhere else.

Excalibur II vs the Field: CZ-21, DEUS II, Sea Hunter Mark II, PulseDive

"Best underwater detector" is the wrong question, because a machine rated to 5 m and one rated to 60 m are not competing products. The useful question is which detector suits the depth band you actually hunt.

Surf, wading and shallow water. This is where the Excalibur II is at its weakest relative to the field. If the detector never submerges past the coil, the 5.1 lb frame buys stability you do not need, and the audio-only interface asks for a learning curve with no payoff. Lighter simultaneous multi-frequency machines handle this band better, as covered in our roundup of the best waterproof metal detectors.

Recreational diving to about 20 m. The XP DEUS II makes a strong case here and is the only serious modern challenger to the Excalibur in the water. It is a fully wireless system starting around 750 g, with 12 factory and 12 user programs, 49 selectable single frequencies across roughly 4 to 45 kHz, digital target ID, and coil options at 9 inches, 11 inches and 34 × 28 cm. It is also an excellent land detector, which the Minelab is not. The caveat is technical and easy to miss: normal wireless radio does not propagate through water, so submerged operation relies on XP's underwater antenna to bridge coil and control unit, and the red pressure cap is required for the full 20 m rating while the grey cap covers shallower use. Bone-conduction headphones are available for depth work. Check the XP DEUS II on Amazon.

Roughly 20 to 60 metres. This is the Excalibur II's remaining niche, and very little current full-size discriminating hardware is designed for it. Almost nothing else combines an induction-balance multifrequency platform with a 60 m rating and a ferrous discrimination circuit. If you dive rather than snorkel, the field thins to this detector and one other.

Beyond 60 m. The Fisher CZ-21 is rated to 250 ft, roughly 76 m, and is the deepest current traditional competitor examined here. It runs dual-frequency VLF at 5 kHz and 15 kHz with salt compensation, offers Target-ID, Auto-Tune and Pinpoint modes, manual ground balance and adjustable discrimination reported through three-tone audio, and carries a two-year warranty. No screen, hardwired headphones, four 9V batteries with stated runtime up to about 55 hours, and roughly 2.6 kg. The Excalibur-versus-CZ decision is less about capability than about tones, ground handling and how each housing sits on your body. Community discussion has long treated the CZ platform as tank-like and hip-mount friendly, while giving the Excalibur the deeper modification ecosystem and the stronger surf reputation. Check the Fisher CZ-21 on Amazon.

The classic rival, now a used-market question. The Garrett Sea Hunter Mark II is pulse induction, rated to the 200 ft class, supplied with an 8-inch mono coil and an optional 10 × 14-inch mono coil, running All Metal plus Standard and Discrete Trash Elimination with adjustable threshold and elimination. It uses eight AA batteries and a separately sealed battery compartment with dual O-ring construction, and Garrett promoted salt and mineral immunity from the start. The 2026 correction is that it is no longer a normal current-production alternative: Garrett's current underwater lineup omits it, and DetectorProspector carries a 2025 update marking it discontinued, with remaining examples appearing to be residual dealer inventory. Its relevance now is contextual and second-hand. Owner comparisons put it ahead on clean beaches and in deeper water and well behind on iron-heavy shorelines, where so much junk has to be excavated that the Excalibur's discrimination saves hours of work. On severe black sand, the PI advantage is real and worth weighing. On a purchase decision, warranty pathways and long-term parts availability should now outweigh a modest residual-stock saving.

The compact deep-rated option. The Nokta PulseDive 2-in-1 is a convertible scuba detector and pinpointer rather than a full-length sweep machine. It is pulse induction at about 3 kHz, IP68 rated to 60 m, with five sensitivity levels, frequency shift, audio, vibration, combined and LED alerts, roughly 39 cm in scuba form and around 419 g, a 1,650 mAh LiPo battery charging in about two hours, and a two-year warranty. A dedicated scuba version with a larger coil runs roughly 550 g. Its appeal is portability, low cost and working tight spaces, not equivalence: it has neither the sweep coverage nor the discrimination of the Excalibur II. Check the Nokta PulseDive 2-in-1 on Amazon.

Recommended Upgrades

Straight or carbon-fibre shaft. The closest thing to a consensus modification on this platform. Owners report noticeably better balance and less wrist fatigue than the factory arrangement, and it is the first change to make.

Anderson-style underwater shaft and arm configuration. Common among divers because it relocates the bulky control and battery mass into a more manageable position rather than leaving it on the stem.

Hip Mount Kit. Minelab still lists it for the platform, and it moves the weight off the shaft entirely. Rear and chest mounting arrangements are also used by owners for the same reason.

Knob guards and sturdier replacement knobs. Inexpensive protection for the controls that sit most exposed on the housing.

A fresh battery pack on any used unit. Battery cells and tubes are a known weak point on older machines. Community lithium conversions exist, but pressure integrity and warranty implications vary by supplier, so a conversion should not be assumed to be a manufacturer-approved waterproof upgrade without independent pressure verification.

Seal and O-ring servicing. On a detector designed for serious submersion, preventive maintenance matters more than fashionable modifications.

The dive shaft. Already supplied by Minelab, and preferable to the long land shaft for scuba work. Buying it separately is an unnecessary expense.

Worth flagging for anyone browsing parts: aftermarket coil conversions circulate in enthusiast circles, but the factory coil is hardwired. This is not a consumer plug-in swap, and no wording on a parts listing changes that.

Conclusion & Final Verdict

No, the Excalibur II is not the best underwater detector in every sense, and 2026 makes that clearer than it used to be. The XP DEUS II is dramatically lighter, more adaptable and easier to live with up to 20 m, and it works on land. The Fisher CZ-21 goes deeper on paper at 250 ft with a longer warranty. The Nokta PulseDive costs a fraction of either and travels in a daypack. For shallow-water and beach work generally, modern simultaneous multi-frequency detectors win on comfort, information and price.

But none of those machines does the specific job the Excalibur II does. Between roughly 20 and 60 metres, with salt and mineralisation in play and iron in the ground, it remains one of the very few current full-size detectors that combines that depth rating with real ferrous discrimination, and its audio-only interface stops being a limitation the moment your eyes are busy with something else. The price of admission is weight, age and a hardwired service model that turns a cracked cable into a workshop visit.

If you dive and you hunt trashy salt, buy it, budget for a straight shaft and treat the seals as a maintenance item. If you wade, or you want one detector for everything, spend the money elsewhere. For the wider picture across brands and platforms, see our Minelab brand guide, the underwater detector comparison and our waterproof detector picks.

Check the Minelab Excalibur II on Amazon