Tesoro Sand Shark Underwater Metal Detector Review

The Tesoro Sand Shark

The Tesoro Sand Shark goes deeper than you can imagine. The more you get familiar with the machine, the more you will have fun using it. Like other Tesoro metal detector models, the Tesoro Sand Shark incorporates two modes. However, unlike other models that are VLF (very low frequency) units, the Tesoro Sand Shark Underwater Metal Detector uses pulse induction technology, which is way better than VLF. Detectorists and hobbyists who are working underwater or at wet saltwater beaches, mostly prefer pulse induction (PI) detectors. This is because of the conditions at beaches and underwater triggers conductivity issues that a VLF unit may overlook. VLF metal detectors are highly unreliable in these areas.

With the Tesoro Sand Shark Underwater Metal Detector, you get to choose your own operating mode – the normal mode and the VCO mode.

When operating in the normal mode, it will produce a normal regular tone like any standard metal detector, as you get closer to the target. However, with VCO (voltage-controlled oscillator) mode, you will get louder, higher-pitched tone, as you get closer to the target. This is an excellent pinpointing system for treasure hunters and detectorists who prefer hunting in high-traffic regions. The best part about this underwater metal detector is that it has a fantastic search depth of 200 feet underwater. That means you can go as far as 200 feet in the water in search of treasure. However, it will require you to bush up your scuba diving skills. Lastly, it is decently priced for an underwater metal detector. Tesoro Sand Shark is Best for:

Gold prospecting
Relic and coin hunting on dry land
Scuba diving and underwater metal detecting
Wet saltwater beach hunting

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Pros and cons of the Tesoro Sand Shark

What we liked

Pulse Induction Technology: The Tesoro Sand Shark metal detector is excellent at metal identification thanks to the incorporated pulse induction technology. This allows the user to go deep into the water in search of treasure. With the help of the two search modes, you can adjust search power.
Waterproof Housing (200 feet): Another significant aspect of the Tesoro Sand Shark metal detector is that it is completely waterproof and is doesn’t affected by saltwater either. If you are a good diver, you can take this machine underwater up to 200-feet.
Interchangeable Coils: The Tesoro Sand Shark underwater metal detector comes in two coil versions. You can buy a single or even both depending on your requirements. The 8.5-inch coil is perfect for searching at specific regions like high traffic areas for accurate searching, whereas the 10.5-inch coil is best suitable for beachcombing.
Superior Battery Life (8 AA Alkaline Batteries): The Tesoro Sand Shark underwater metal detector is powered by 8 AA alkaline batteries, giving the users the maximum usable time of up to 20 hours. This is a great aspect to have in a metal detector, as you know, treasure hunts consume a lot of time.
4 Knobs: The Tesoro Sand Shark metal detector consists of 4 knobs – threshold, mode, volume, and pulse. Thus, it makes it easy for users to operate the machine without any hassle. All they have to do is adjust the respective knobs as per their requirements when going to treasure hunting.
Two Operating Modes: The Tesoro Sand Shark underwater metal detector comes with two operating modes (normal and VCO) allowing you to search for relics and coins on the surface as well as underwater with accuracy.
Lifetime Warranty: Tesoro is one of the few brands that offer a lifetime warranty on their products. The Tesoro Sand Shark comes with a lifetime warranty, indicating that the product stands tall to all the consumer requirements.

What we didn't like

It is Heavy: Compared to other Tesoro metal detector models, the Tesoro Sand Shark is quite heavy, weighing a little over six pounds. This makes it difficult to operate, especially underwater.
You can change the coils only if you send your device to the factory. There is no other way.
No discriminate system

Tesoro Sand Shark Features:

Select your Operating Mode: The Tesoro Sand Shark Underwater Metal Detector comes with two distinct operating modes – the Normal Mode and VCO Mode. When operating in the normal mode, it generates a single tone, which is helpful during beachcombing and other protracted explorations. The VCO mode, on the other hand, the threshold will generate a louder tone as the target gets closer to the coil. Most importantly, Tesoro has incorporated a microprocessor into the Sand Shark model to help you customize the underwater metal detector as per your particular requirements. Tesoro Sand Shark’s console unit comprises of a Pulse Width control that allows you to set your metal detector to the best balance of sensitivity, depth, and battery life.You can change the frequency of the Normal Mode audio by using the ‘F’ Adjust knob. Lastly, in the operation mode, the manufacturer has included a new drop-in battery compartment for easy and quick changes, allowing for uninterrupted fun.
Advanced Digital Pulse Induction (PI) Technology: The Tesoro Sand Shark Underwater Metal Detector is first of its kind metal detector that combines the latest digital technology with the proven and celebrated Pulse Induction (PI) circuits for creating a microprocessor controller pulse induction detector for the new millennium. When it comes to hunting at the wet saltwater beaches, the pulse induction underwater metal detectors are the preferred choice as such machines can handle conductivity issues. That is, with Tesoro Sand Shark, its coil and circuitry will not see any changes due to saltwater conductivity that drives VLF (very low frequency) metal detectors crazy.
Available in 8.5-inch and 10.5-inch Search Coil Versions: The Tesoro Sand Shark underwater metal detector comes in two search coil versions – an 8.5-inch and 10.5-inch search coils. You can choose between the two based on what’s important to you. Do you want more precise detection, or do you want to cover more search grounds? The choice is yours.
Other Features
- Stereo Piezo Headphones – waterproof headphones hardwired into the control box
- Runs on 8 AA batteries
- Preset Ground Balance
- Operating Mode – All metal
- Sensitivity- Pulse-Width Adjust
- Waterproof

What others say about the Tesoro Sand Shark

This is an advanced metal detector meant for professionals but can also cater to the hunting needs of beginners as well. Most users who have used Tesoro Sand Shark Underwater Metal Detector have only good things to say about this model. One of the users said that the machine performed well in both the locations – surface and underwater. Another user pointed out how the device behaves differently in different sand compositions – dry vs. wet. The coil may tend to chatter, which can be frustrating, but it still works if you are able to overcome those chatters and concentrate on the signal.

One user who looked like he mastered the device gave out ‘recommended settings’ advice to other users. He said that the machine works best when:

Used in normal mode
Volume is a little past halfway (1 o’clock)
The pulse width is in the center position

Although some complained about the threshold being tricky, the logical explanation was given that you would want to hear a low ‘buzzing or humming’ sound.

Buying advice Tesoro Sand Shark

The Tesoro Sand Shark Underwater Metal Detector is a little expensive as compared to other Tesoro models. But given the functionality and features it offers, the price is worth every penny spent. However, you would want to consider several factors before buying this machinery. For starters, look for any deals and discounts offered on this model on Amazon or anywhere else. You can also wait for end-of-season sales where sellers give out products on reasonable discounts.

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Tesoro Sand Shark : Conclusion

The Tesoro Sand Shark Underwater Metal Detector is one of the finest pieces of machinery produced that can give a jolt to all the hobbyists and detectorists out there. If you are an experienced detectorist who wants to explore the heights of metal detecting apart from trash sites and compact regions, say beaches and underwater, then this is the best device you can avail.

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