Underwater Metal Detectors and Detecting Tips

Are you thinking of finding treasures underwater? We have looked at the basics of metal hunting under and near water bodies to help you venture into this field.

Before we dive into the details, you need to figure out the answers to these questions:

  • What is the best underwater metal detector?
  • Where do you intend to look for metal? Freshwater or saltwater?
  • Do you intend to hunt in shallow water, on the beach, or dive deep into the ocean?

Finding the answers to these questions can guarantee you a successful underwater treasure hunting.

Underwater Metal Detecting

Two Types of Underwater Metal Detectors

Underwater metal detectors come in two main categories: Pulse Induction (PI) and Very Low Frequency (VLF) Metal Detectors. What is the difference, and why should you buy one and not the other?

Pulse Induction Metal Detectors

PI metal detectors are deep seeking machines and are ideal for hunting in and under saltwater because they provide enhanced search depth. The PI devices work through electronic and voltage pulses that cannot be affected by minerals in the seawater.

However, these products often provide false signals because they cannot differentiate between treasures and trash. You might end up scooping up debris, wasting precious time.

Very Low-Frequency Metal Detectors

VLF metal detectors work by generating an electromagnetic field of between 3kHz to 100kHZ. They are the right machines for hunting in areas with lots of trash because they allow you to detect the gem without wasting time on iron.

One thing to note is the VLF models can easily malfunction if you are hunting in or under saltwater. That means they are the perfect detectors for freshwater hunting.

Alternatively, it would help if you got a VLF machine with saltwater, ground balance, and sensitivity settings. You can combine the three features to navigate through highly mineralized areas without trouble.

Underwater Metal Detectors Features

Now you know there are two types of metal detectors that you can use to hunt underwater. But should you take any model of the two types that you find on the market?

Remember the following when choosing your underwater metal detector – whether it is the PI or the VLF type. 

Submersible vs. Waterproof vs. Weatherproof 

You find lots of metal detectors claiming to be waterproof, weatherproof, and submersible.

Waterproof Coil and Weatherproof Control Box

In most cases, the only waterproof part in metal detectors is the shaft and search coil, the control box being weatherproof. Such a product can be ideal for exploring under shallow water, where only the loop gets into the water.

These kinds of metal detectors are also ideal for detecting when there are slight showers. You should avoid taking such a machine at the beach because any minor hit by the water weave can damage it.

The headphones supplied with these devices are not waterproof, maybe weatherproof.

Waterproof Coil and Submersible Control Box

A submersible metal detector is a machine that you can dive underwater and use it without any problem. Such a product comes with a waterproof search coil, headphones, control box, and other parts. 

Waterproof headphones might also mean that the headphones jack is sealed, as well as the battery chamber. Submersible metal detectors can even allow you to dive over 200 feet in the ocean to look for treasures.

Underwater vs. Beach Use

An underwater metal detector might not be ideal for use at the beach or places with saltwater. Such a product might do fine in freshwater areas but be affected by wet sand and seawater.

Another thing you should note is a beach metal detector might not be submersible. It can be a VLF model that you can use in shallow water at the beach.

Important Tips:

#1. A PI metal detector is recommended for saltwater or places with high mineralization.

#2. A VLF metal detector is ideal for freshwater metal hunting.

#3. A VLF metal detector with ground balance, sensitivity, and saltwater settings can work for saltwater.

#4. A submersible metal detector, where search coil, control box, battery chamber, and other parts are waterproof, is ideal for divers.

#5. A weatherproof metal detector with a waterproof search coil can work for shallow water.

#6. Not all beach detectors are submersible.

Underwater Metal Detecting Accessories

Your underwater metal detector is not the only thing you required to have a successful day. Some accessories can make or break your hunting session.

They include:

  • Digging tools: You need to carry a bucket, shovel, or any device you find comfortable to dig out the treasure.
  • Sifter: It can be handy when sifting the wet sand. It would help if you considered using a long-handle scoop.
  • Waterproof headphones: You want to work underwater, and waterproof gears give you the freedom to do that without fretting out.

Safety Tip for Underwater Metal Hunting

There are thousands of dangers that you can face when searching for metal underwater. They include stones, glasses, animals, and other things.

  • Have the right gear: Sharp rocks and stones, coral, glass, and trash can injure your feet. Wear the right kind of boots, which should also be waterproof.
  • Locking shaft: The shaft can provide you balance when using your machine underwater. You can also use a hip mount or chest harness to keep your metal detector secured.
  • Tidal movement: You should also consider the tides as they can endanger your life if they are too strong. The tidal flow also brings and carry away treasures.
  • Swim gears: It is also ideal to have the perfect swim clothes if you wish to dive to about 200 feet in the water.

In Conclusion

Use the right metal detector when hunting underwater and ensure you set it the right way. Also, use the proper technique and wear the appropriate gears for underwater metal detecting.

It is also advisable to hunt at the right places to ensure that you do not waste your time in trash-filled areas. It would help if you even went hunting when the time is right, like during summer, when many people are around water bodies.