Dive into Treasure Hunting: The Ultimate Guide to Underwater Metal Detecting Coils
Coils for Underwater Metal Detecting: A Comprehensive Guide
Metal detecting enthusiasts are always on the lookout for new and exciting ways to pursue their passion. And what better way to take this hobby to the next level than by exploring the depths of lakes, rivers, and oceans? Underwater metal detecting opens up a whole new world of possibilities, but it also requires specialized equipment. One crucial component that plays a pivotal role in underwater metal detecting is the coil.
In simple terms, a coil is an essential part of a metal detector responsible for transmitting and receiving electromagnetic signals. It acts as both an antenna and a receiver, allowing the detectorist to locate buried metallic objects beneath various surfaces, including water. When it comes to underwater metal detecting, choosing the right type of coil becomes even more critical.
There are several factors to consider when selecting coils for underwater use:
1. Waterproof Design:
Since these coils will be submerged in water during operation, they must be completely waterproof. The housing should be made from high-quality materials such as epoxy or polyurethane resin that can withstand prolonged exposure to water without compromising performance.
2. Size and Shape:
Coils come in different sizes and shapes depending on their intended purpose. For general underwater hunting or searching larger areas quickly, larger coils with diameters between 10-15 inches are ideal due to their wider coverage area. Smaller coils (around 5-8 inches) offer better target separation and sensitivity in highly mineralized environments but cover less ground.
3. Frequency:
The frequency at which a coil operates significantly impacts its performance underwater. Lower frequencies (between 2-6 kHz) are suitable for deep-water detection since they provide enhanced depth penetration capabilities while sacrificing some sensitivity to small targets. Higher frequencies (above 10 kHz), on the other hand, excel at locating smaller objects near the surface but may not reach deeper depths effectively.
4 Sensitivity:
Underwater conditions can be challenging due to mineralization and other interference. Therefore, it’s crucial to select a coil that offers adjustable sensitivity settings. This feature allows detectorists to fine-tune their equipment according to the specific conditions they encounter underwater.
5. Coil Type:
There are two main types of coils used for underwater metal detecting: Concentric and Double-D (DD). Concentric coils emit a cone-shaped detection pattern, making them ideal for pinpointing targets accurately. DD coils create a blade-like detection area and are better suited for covering larger areas quickly.
Now that we’ve covered the essential aspects of selecting underwater metal detecting coils let’s explore some popular options on the market:
1. Garrett Sea Hunter Mark II Pro-Pointer:
This waterproof pulse induction (PI) detector comes with an 8-inch PROformance™ submersible searchcoil, allowing you to dive up to 200 feet deep. The Sea Hunter Mark II has excellent sensitivity, target discrimination features, and is suitable for both saltwater and freshwater environments.
2. Minelab Excalibur II:
Another top-of-the-line choice is the Minelab Excalibur II, renowned for its exceptional performance in extreme underwater conditions. With its unique Broad Band Spectrum (BBS) technology and 10-inch Double-D coil design, this detector offers superior target separation while operating at multiple frequencies simultaneously.
3. Fisher CZ-21 Quicksilver:
The Fisher CZ-21 Quicksilver is a versatile VLF metal detector designed specifically for underwater use. It features dual-frequency capability (5 kHz or 15 kHz), adjustable discrimination modes, and ten sensitivity levels—all housed in a completely waterproof construction up to 250 feet deep.
In conclusion, if you’re ready to take your metal detecting adventures beneath the waves or simply want to explore watery terrains like beaches or riversides more effectively – investing in high-quality underwater metal detecting coils is paramount. Remember to consider factors like waterproofing, size and shape, frequency, sensitivity, and coil type to find the perfect match for your underwater detecting needs. With the right coil in hand, you’ll be well-equipped to unravel hidden treasures lurking beneath the depths. Happy hunting!