There are several brand and model of underwater metal detector. You can find it here. If you have time, you can search it in the internet, use a keyword underwater metal detector. Many brand and model will come up. Choose the best for you. I discuss the few of them.
Fisher CZ-21 Metal Detector with 8" Search Coil FREE Treasure Hunting Accessories
You can go anywhere with the CZ-21 even 250 feet underwater. The CZ-21 is a go-anywhere, do anything, all-weather, target-ID machine that is leak proof to 250 feet. And its patented electronics make it deep-seeking while it ignores the destabilizing effects of salt water.
It is the perfect target ID machine for the versatile treasure hunter who wants to hunt anywhere-underwater, on the beach, in the surf, on dry land and in all kinds of weather.
Tesoro Tiger Shark underwater metal detector - Price: $749.00
I have found that the Tigershark is incredible at sniffing out very small targets. Once set up, seal the case and don't try to 2nd guess, it will operate for many hours without adjustment. Searching in many lakes, ponds and rivers have been very rewarding; the finds included a huge German silver broach and many rings, coins and jewelry. The lifetime is the best warranty and is the frosting on the cake. And Tesoro has the best, most accommodating personel I've ever seen.
DetectorPro Headhunter Diver - Price: $799.00
• Operating Search Frequency: 2.4kHz quartz crystal controlled
• Searchcoil:Solid 8" MegaDEPTH heavy-duty negative buoyancy coil, co-planar, RF shielded, (optional) 10" searchcoil with UW connector
• Headphone Transducers: Permanently encapsulated high-output piezoelectric
• Audio Frequency: 400 Hz
• Search Mode: Silent search, slow motion full range discrimination
• Operating Environments: Land, Mountains Salt & fresh water to 100 feet, beach, rain storms
Garrett Sea Hunter Mark II Metal Detector - Ideal for Beaches, Lakes, Oceans, and all Waterways.
Sea Hunter has been The Master of Water Treasure Hunting for over 25 years. With it's unique Discrete Trash Elimination technology, the Sea Hunter Mark II can eliminate most pull tabs and foil without significantly degrading the sensitivity of rings and coins in Discrete Elimination mode.
A favorite detector for treasure hunters around the world because of it's ability to ignore salt water, the Sea Hunter's electronic housing can be mounted on the hip or above, below or under the cuff in either short or long configuration.
Tesoro Sand Shark Underwater Metal Detector
The Tesoro Sand Shark metal combines time-proven PI circuits with the latest digital technology creating the first microprocessor controlled PI detector for the new Millennium.
Pulse Induction (PI) metal detectors have always been the natural choice for working wet salt beaches. Their circuitry and single loop coils will not see changes in salt-water conductivity that drive a VLF-style metal detector crazy. Add Tesoro Electronics' exclusive interchangeable Printed Spiral coils (available in four sizes) and you create a fantastic PI detector. But they didn't stop there.
The Tesoro Sand Shark metal detector has two distinct operating modes: VCO and Normal. When working in the VCO mode, as targets get closer to the coil, the threshold generates a louder, higher pitched tone great for pinpointing. The Normal mode works with a single tone and is used for beachcombing and other prolonged searches.
Tesoro has added a microprocessor to help you customize the detector to your specific needs. This metal detecting unit includes a Pulse Width control which allows you to tune your detector to the best balance of depth, sensitivity, and battery life. You can also change the Normal mode audio frequency. Simply use the "F" Adjust knob to set the tone and you're ready to go. The Tesoro Sand Shark metal detector also has a new drop-In battery compartment for quick and easy changes.
JW Fishers Pulse 6X underwater metal detector with 7 1/2" Coil and Connector - Price $1,645.00
Commercial quality in a hand held metal detector designed for land and water use. This model includes a waterproof search coil connector which allows the detector to use other size search coils. The Pulse 6X is in use by military, law enforcement, commercial, and salvage divers worldwide.
The Pulse 6X has the same top quality construction and many of same the features as Fishers top-performing Pulse 8X. The Pulse 6X not only shares the same features as the Pulse 8X, it can be upgraded to the Pulse 8X at any time. No other detector is available with this type of upgrade feature.
JW Fishers RMD-1 Remote Metal Detector Option. For JW Fishers Sea Lion & Sea Otter and other ROV's. RMD-1
An underwater metal detector with high noise immunity that can be remotely operated by an ROV. The RMD-1 is a high performance Pulse induction metal detector which can be attached to almost any ROV or towed underwater system as shown in the photo above. Pulse induction technology allows the RMD-1 to detect both ferrous and non-ferrous metal objects on or beneath the ocean floor while ignoring minerals in the seabed. The remote metal detector locates and tracks underwater pipelines, finds missing tools and dredge parts, locates weapons and unexploded ordnance, and finds lost treasure.
There are several brand and model available in the market today. Select the best for you.
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