Waterproof Metal Detector

If you are wanting to expand your search for treasure from dry land to water, a waterproof metal detector is a must. Even though few metal detectorists search in the ocean, searching in shallow water can yield some great items such as rings, watches and necklaces from beach goers to ancient coins from old shipwrecks.

With all of the confusing choices and marketing propaganda, what do you really need in a waterproof metal detector?

First, there are three main types of waterproof metal detectors and each one has a performance advantage depending on where and what you are looking for. .

The first type is the Pulse Induction (PI) detector which excel in diving and salt water beach areas. These detectors are not affected by ground minerals or wet salt sand. The PI detector uses rapid electronic pulses which can sense items deep in the ground and are very sensitive to precious metals. The downside is they don’t discriminate very well for junk.

Very Low Frequency (VLF) metal detectors can discriminate better than Pulse Induction metal detectors but they are affected by areas with high minerilization (which to a certain extent can be adjusted to over overcome this deficiency). One downside to the VFL detector is that it is not good around salt water.

The third type of waterproof metal detector is a Broad Band Spectrum (BBS) detector which uses a simultaneous, multiple frequency signal. This detector is very sensitive and can be used in fresh or salt water.

Techniques for Metal Detecting in Water
The proper techniques for searching on dry land will be the same in the water. When you detect a target, stop and mark the target by placing one of your feet immediately behind the target. Take a deep scoop of sand from in front of your foot, then move the scoop to the side and use your metal detector to assess whether or not the target is still in the hole. If it is take another scoop and keep doing this until you find the target. If you stopped to empty the scoop every time, you may lost the mark where the target is. As you move the scoop through the water, the sand should simply strain out of the scoop and reveal your target.

Best times to Metal Detect in Water
In the ocean, its best to begin hunting as the tide is going out and a couple of hours before low tide. Most finds will be in the deeper water which you can only reach when the tide is at its lowest. You can also find many items after storms pass through since these often reveal items through erosion and waves that push items to the surface.

Diving with a Metal Detector
If you will be diving, make sure you get a waterproof metal detector that is rated for the depths that you intend to dive. You are typically better to get a detector rated for deeper depths than you think you will need, because once you get hooked you will want to try deeper depths. Also, make sure to get a short dive pole, which is more comfortable to use while snorkeling or diving.

We are big fans of supporting your local retailer and finding the right waterproof metal detector (especially your first) takes some guidance. They will be able to advise you in deeper detail about features and functions you may want to have, and give you some first-hand field experience with several different models. So before you dive in, do your research and know what you need, and what you don’t.

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Category: Metal Detecting Tips

Comments (25)

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  1. Chris Turner says:

    Nice video, Thanks for sharing your discoveries.

  2. leitchee says:

    hey cool video, i remember when i was little got a mini metal detector found nothing in my garden but a old nut and bolt :(

  3. Raymond Medina says:

    HAHAHA the way he digs for it haha

  4. SaviourSole says:


  5. justusqqq says:

    don’t u think that its kinda odd how he instantly found something in the water and how he knew exactly what it was when he got up

  6. Beau Ouimette says:

    Pretty weird huh? I don’t think most people wanted to see me not finding things, so I never post those clips. And I do have a few of those! Also, I’ve been doing this for 30 years so I kinda know what most things are when I dig them. Anyway, thanks for the comment and for checking out the video.

  7. aleko753 says:


  8. TigerRifle says:

    Anyone who knows aguachigger personally, knows that it is not weird at all that he makes finds quickly and knows what they are likely to be before he recovers them. This guy finds more in a week of hunting than many find in a lifetime! He is THAT GOOD!

  9. Jokadoll12 says:

    you are dog?

  10. NewElita6 says:

    Fail lol

  11. saintpaddydaybride says:

    I think he does that to lower the amount of dirt that will get kicked up.

  12. TheCole07 says:

    i live in wichita ks. along the little arkansas river. do you think i will have any luck?

  13. Beau Ouimette says:

    You never know until you go. I’ve found treasures even in very unlikely places. Good luck!

  14. micmoable says:

    a ping pong paddle would be good for swishing the water and silt back and forth

  15. Beau Ouimette says:

    You’re right, it does work, but it’s just another thing to keep track of. The hand actually works pretty well to as long as it’s gloved. Thanks for checking out the video!

  16. micmoable says:

    I hear ya—your right that paddle would just be another something to try to keep up with

  17. Rommel107 says:

    Was ist das fürn teil

  18. Ryan H says:

    Be carefull there are no fishing hooks down thier bud with your bare hands

  19. Beau Ouimette says:

    ….@therichesthobo1 That’s always a real danger along with broken glass. My technique is a little better now after a few cuts. Thanks for the comment!

  20. jg42317 says:

    feel like i have to holde my breathe

  21. aaaarrrgggghh says:

    mechanics have this thing that looks like a pen, it has one tiny but real powerful magnet at one end and it can be “extracted” same as a walkie talkie aerial so it becomes about 3 feet long. Obviously it only works for iron. You just sweep it over the area and it will pick the thing up.

  22. Beau Ouimette says:

    …..@aaaarrrgggghh You’re right. Magnets do come in handy while detecting. I use a strong neodymium magnet on my digging pick to find the iron faster. Some of my other videos show how I have it set up. Works great!

  23. blindedby2monkeys says:

    15 people have clear faces

  24. stemart1641 says:

    Man……good thing there wasn’t a broken bottle on the bottom when you were removing all the rocks & stuff!

  25. Beau Ouimette says:

    I hear ya. Just yesterday I got a small sliver of glass in a finger. The first in quite a while. I try to keep at least on good glove on at all times now.