Minelab Excalibur II: Dive Deep into Underwater Exploration

In this article, we will review the Minelab Excalibur II metal detector, a professional-grade device designed for underwater treasure hunting. With 17 operating frequencies, this detector excels in various environments, including beaches and underwater settings. Its primary feature is its capability for underwater searches, making it a favored choice among treasure hunters seeking hidden gems beneath the waves. Throughout this review, we will explore its key features, benefits, and performance in different hunting scenarios.

What is this metal detector designed for?

The Minelab Excalibur II metal detector is specifically designed for locating lost jewelry, coins, and other treasures underwater. This versatile device can be submerged, allowing treasure hunters to explore depths of up to 200 feet (60 meters). The Excalibur II effectively differentiates between non-ferrous metals like gold and silver and ferrous materials.

With proper discrimination adjustments, users can set the detector to ignore signals from unwanted items such as bottle caps, foil, and iron, enabling the detection of valuable non-ferrous targets. This adjustment is easily performed using the controller located on the metal detector’s shaft, ensuring that both beginners and experienced users can optimize their searching experience.

Model	Minelab Excalibur II
Application	Coin, Relic, Jewellery, Beach & Dive (waterproof 200ft)
Technology	BBS
Weight	8″ Coil 2.1kg (4.6lbs) or 10″ coil 2.3kg (5.1lbs) (inc NiMH battery)
Length (Adjustable)	Standard shaft 1140 mm – 1220 mm (45″ – 48″); Dive shaft 820 mm – 910 mm (32″ – 36″)
Batteries	NiMH battery pack 13V 1000 mAh
Headphones	Included, Koss 8, hardwired
Warranty	1 year
Operating Principle	VLF
Standard Searchcoil	10″ Double-D hardwired
Operating Frequencies (kHz)	Multiple frequencies: 1.5, 3, 4.5,…25.5kHz)
Water resistance	Underwater metal detector
Submersion Depth	waterproof 200ft
Discrimination	Variable Discrimination (adjustable turn control) & All Metal
Ground Balance	Automatic ground rejection
Detect Modes	Discriminate or All-Metal (Pinpoint)
Target Volume Adjust	Adjustable turn control
Audio Threshold	Adjustable
Electronic Pinpointing	Yes
VDI (0 to 99 scale)	No
Build-in flashlight	No

Last update on 2025-05-11 / Affiliate links / Images from Amazon Product Advertising API / Source: Amazon Affiliates

The shaft

The Minelab Excalibur II features two shaft options: a standard shaft measuring 1140 mm to 1220 mm (45″ to 48″) and a dive shaft that ranges from 820 mm to 910 mm (32″ to 36″). The battery holder and control unit are conveniently attached to the upper shaft section, providing easy access for the user.

While the detector includes an armrest for added support, many experienced detectorists choose to remove it. This is primarily because, underwater, it is often more convenient to hold the device by gripping the battery holder or the shaft section near the search coil. This design allows for greater flexibility and maneuverability compared to using the standard method, where the user’s hand is positioned on the handle and the elbow is fixed in the armrest. Furthermore, the armrest can create additional resistance underwater, which may hinder the efficiency of treasure hunting.

The adjustable shaft length allows users of varying heights to customize the detector’s length for optimal comfort and control. Additionally, the ergonomic design of the grip and shaft helps reduce fatigue during long treasure-hunting sessions, making it more comfortable to use. The Excalibur II is also compatible with various accessories, such as search coils and headphones, which can enhance the user experience. Its calibration allows it to perform well in saltwater environments, where standard metal detectors may struggle.

The coil

The Minelab Excalibur II metal detector is equipped with a 10″ Double D search coil and waterproof stereo headphones. This coil offers a fast target response and excellent recognition of both ferrous and non-ferrous metals. When utilizing the pinpointer mode, the coil provides a highly precise pinpointing capability.

To enhance durability, the search coil is protected by a removable plastic cover, which prevents potential mechanical damage when used on rocky bottoms or challenging terrains.

The Excalibur II employs innovative BBS (Broadband Spectrum) technology, allowing the detector to operate on multiple frequencies simultaneously. While most metal detectors on the market today utilize only one or duplex frequencies ranging from 1 kHz to 60 kHz, the Excalibur II broadcasts signals across 17 frequencies, from 1.5 kHz to 25.5 kHz. This capability ensures excellent performance in various environments, including both fresh and brackish waters.

Factors such as soil mineralization, iron debris, and target size can significantly affect a metal detector’s sensitivity. However, with its multi-frequency technology, the Excalibur II can detect and accurately identify targets at maximum depths, regardless of soil conditions.

The signals received from the search coil are processed by the detector’s computer and delivered to the user through the headphones. Additionally, the Excalibur II features a specialized RCB (Reinforced Circuitry Booster) technology that enhances detection depth by amplifying the signal tone from small and deeply located objects while minimizing phantom signals and background noise.

The headphones

The Minelab Excalibur II metal detector is equipped with wireless KOSS headphones designed specifically for underwater use. These headphones are filled with water during the initial setup, so it’s important to wait a few seconds for them to fill completely before starting your treasure hunt.

However, one downside of this feature is that the filling process can be somewhat noisy. If you begin treasure hunting while the headphones are still filling, you may miss some important signals, which could affect your overall success in locating treasures.

The battery

The Minelab Excalibur II metal detector is powered by rechargeable NiMH accumulator batteries with a capacity of 1000 mAh or by eight AA batteries. These power sources provide a continuous operation time of approximately 14 to 19 hours, ensuring extended use during treasure hunts without frequent interruptions.

Additionally, some Minelab Excalibur II packages may include useful accessories such as a plastic battery box for organization, a carry bag for easy transport, and a utility belt designed for comfortable treasure hunting on land. These accessories enhance the overall user experience, making it easier to keep your gear organized and accessible while searching for treasures.

Waterproofness

The Minelab Excalibur II metal detector is fully waterproof, allowing it to be submerged up to 60 meters (200 feet) deep. This feature makes it an excellent choice for underwater treasure hunting, whether you’re exploring lakes, rivers, or ocean floors. With its robust design, users can confidently search for lost valuables in challenging aquatic environments.

The control unit

The control unit of the Minelab Excalibur II features a unique, hermetically sealed, teardrop-shaped cylindrical design. This sturdy case houses the powerful internals of the device, enabling reliable performance even underwater. Control of the metal detector is user-friendly, making it accessible for beginners and experienced users alike.

Instead of an LCD display and speaker, the Excalibur II transmits all target data through waterproof headphones, ensuring clear communication even in challenging environments.

Settings Overview
The metal detector includes five adjustable controls that enhance its usability:

1. Discrimination Scale (1 to 17): This allows users to ignore unwanted targets.
2. Sensitivity Scale (1 to 10): Adjusts the device’s sensitivity to detect targets effectively.
3. Volume Adjustment: Controls the volume of the signals received.
4. Pinpointer Function: Provides precise location tracking for targets.
5. Threshold Tone Adjustment: Fine-tunes the threshold tone for optimal performance.

From the handle of the device, the first sliding bar is the Discriminate/Pinpoint Mode switch. The “Disc” setting allows users to ignore undesirable targets, while the Pinpoint mode enables accurate targeting without discrimination, crucial when multiple targets are nearby.

Next is the Threshold control, which can turn the metal detector on or off while adjusting the threshold tone. The Volume control adjusts the signal’s loudness, and the Sensitivity control fine-tunes detection capabilities.

Finally, the Discriminate control helps define unwanted targets, which can be used in conjunction with the “Disc” setting.

The Minelab Excalibur II also features an automatic ground balance function, ensuring efficient operation without compromising detection depth in both fresh and brackish water.

Conclusion

Nowadays, Minelab Excalibur II is the best underwater metal detector.

The Minelab Excalibur II metal detector stands out as a robust option for underwater treasure hunting, featuring impressive technology and user-friendly controls. However, it’s essential to weigh both its advantages and disadvantages before making a purchase decision.

Advantages:

• Multi-Frequency Technology: The BBS technology allows the Excalibur II to operate across 17 frequencies simultaneously, enhancing sensitivity and performance in various conditions. This feature enables it to effectively detect both small and large targets.
• Deep Water Capability: With the ability to be submerged up to 60 meters (200 feet), this detector is ideal for serious underwater treasure hunters, making it suitable for beach and offshore searches.
• User-Friendly Controls: The intuitive control layout, combined with automatic ground balancing, allows both beginners and experienced users to operate the device efficiently. The various adjustment settings enhance customization for specific hunting conditions.
• Durable Design: The waterproof and hermetically sealed control unit ensures the detector remains functional in challenging environments, adding to its reliability.

Disadvantages:

• No Display: The lack of an LCD screen may deter some users who prefer visual feedback for target identification and depth readings. Instead, all information is conveyed through audio signals, which may not suit everyone.
• Weight and Bulkiness: While designed for underwater use, some users find the device’s weight and size cumbersome during extended periods of use, especially when diving or wading.
• Higher Price Point: The Excalibur II tends to be more expensive than many other detectors on the market, which might not be justifiable for casual users or beginners.

Comparison with Garrett Sea Hunter Mark II:

When comparing the Minelab Excalibur II with the Garrett Sea Hunter Mark II, both metal detectors excel in underwater environments but offer different strengths:

• Technology: The Excalibur II utilizes BBS multi-frequency technology, allowing simultaneous detection across various frequencies, which enhances sensitivity to diverse targets. In contrast, the Garrett Sea Hunter Mark II uses pulse induction technology, making it particularly effective in saltwater environments and capable of ignoring ground mineralization.
• Target Discrimination: The Excalibur II features a detailed discrimination scale, allowing users to customize sensitivity to unwanted targets. The Sea Hunter Mark II, however, is designed for simplicity and relies more on audio signals without as much emphasis on target discrimination.

In summary, the Minelab Excalibur II is an excellent choice for underwater treasure hunters who value advanced features and user customization. However, those looking for a simpler, robust detector that excels in saltwater conditions may find the Garrett Sea Hunter Mark II a suitable alternative. Ultimately, the choice between these two detectors will depend on individual preferences, experience levels, and specific treasure hunting goals.