A Review of the Tesoro Sand Shark
By Terry Soloman
The Tesoro Sand Shark is a pulse induction metal detector, fully waterproof (submersible to 200-feet), and specifically designed for saltwater use. The pulse induction system gives the Sand Shark superior sensitivity and depth capabilities in conductive wet-ocean sand and heavily mineralized saltwater.
The Sand Shark controls are laid out simply, and are very easy to understand and use. The controls include the Mode switch; Pulse Width dial; Threshold dial; and Volume dial. One of the real advantages of the Sand Shark is the adjustable “Audio Frequency.” This allows the user to set the exact audio frequency – or tone, that his-or-her ear can hear the best. This is important, and can mean extra depth and more treasure when you are training your ears to listen for slight breaks and whispers in the Sand Shark’s constant threshold.
The saltwater environment is harsh, punishing electronics and equipment of all kinds. The Sand Shark is designed to thrive in saltwater, and comes with a very tough set of hardwired (permanently attached to the control box) underwater headphones, and a hardwired 8”- or 10.5”- round printed spiral searchcoil. The unit uses eight AA-batteries, which are loaded into a battery pack that is easily inserted into the waterproof control box.
Tesoro really took the Sand Shark to the next level, by giving the user several carry options and swinging set-ups. The unit has an 8’ coil cable and a 6’ accordion headphone cable, so the control box can be mounted below or above the handhold, on a belt, a chest mount or in a backpack. This means even a child can comfortably carry and swing the Sand Shark for hours on end.
The sensitivity of the round printed spiral searchcoil is exceptional. You are able to use swing speeds to overlap wet sand that would be impossible with BBS and VLF machines, and then slow your swing and increase Pulse Width to find deep gold in heavy black sand areas other machines simply can’t detect. Because of the lightweight and ultra-thin design of the coil, it slices effortlessly through the water.
Detection depths for the 8”-searchcoil are impressive. I have detected a 14K gold bangle bracelet at an estimated 18”-19” deep (in hip-deep surf), gold and silver hoop earrings at 15”-18” deep in wet sand, and gold, titanium, silver, and tungsten rings at the same depths in both the surf and wet sand. I routinely find quarters at 16” in wet sand.
Pinpointing with the super-sensitive searchcoil takes a little practice. The Sand Shark begins seeing the target at the extreme edges of the searchcoil. This can throw you off a touch before you become used to hearing the “sweet spot” at dead-center coil. Once you have become comfortable with the searchcoil, pinpointing is easy and very accurate.
I use NiZn rechargeable AA batteries in the Sand Shark, and can average 17- hours of use between charges. Duracell and Energizer AA batteries lasted an average of 19-hours before I felt I was losing depth. I think utilizing AA-batteries is another advantage of the Sand Shark design, which delivers a lot of economical power for a long time. The easy to install and remove battery pack also encourages the user to remove and store their batteries properly between uses.
Cleaning the Sand Shark is as easy as washing it off in the driveway with your garden hose and letting it air dry. It breaks down and sets up quickly and easily. I recommend that you take it apart and rinse it off in fresh water after every use at the beach. The Sand Shark is guaranteed for life, and will outlast you with simple and easy maintenance.
[TABLE="align: center"]
[TR]
[TD="colspan: 2"]SPECIFICATIONS
[/TD]
[/TR]
[TR]
[TD]Operating Frequency
[/TD]
[TD]600 pps
[/TD]
[/TR]
[TR]
[TD]Searchcoil Type
[/TD]
[TD]Printed Spiral
[/TD]
[/TR]
[TR]
[TD]Searchcoil Size
[/TD]
[TD]8" or 10½" diameter
[/TD]
[/TR]
[TR]
[TD]Audio Frequency
[/TD]
[TD]Approx. 220 - 450 Hz
[/TD]
[/TR]
[TR]
[TD]Audio Output
[/TD]
[TD]Stereo Piezo Headphones
[/TD]
[/TR]
[TR]
[TD]Weight
[/TD]
[TD] 4½ lbs.
[/TD]
[/TR]
[TR]
[TD]Battery Requirement
[/TD]
[TD]Eight AA DC (alkaline)
[/TD]
[/TR]
[TR]
[TD]Battery Life (at preset)
[/TD]
[TD]10 to 20 hours
[/TD]
[/TR]
[TR]
[TD]Optimum Temp. Range
[/TD]
[TD]30° to 100° F
[/TD]
[/TR]
[TR]
[TD]Optimum Humidity
[/TD]
[TD]0 to 75% R.H.
[/TD]
[/TR]
[TR]
[TD]Operating Modes
[/TD]
[TD]VCO Motion ALl Metal
[/TD]
[/TR]
[TR]
[TD]Adjustable Audio Frequency All Metal
[/TD]
[/TR]
[TR]
[TD]Maximum Depth Rating
[/TD]
[TD]200 ft
[/TD]
[/TR]
[/TABLE]
Terry, you are the one nobody takes seriously. You ask me to "show the booty" "put up or shut up", etc. Then when Craig responds, you say showing finds isn't important.... what a joke...
You lie about the machines you have used, lie about the gold you have found, lie about the Sand Shark being a top tier machine... do you ever tell the truth?
Many of us have great respect for Craig, he has a lot of experience, you can trust what he says, and gives good advice to newbies.
Then there is Terry.... "Hunting tot lots? Sand Shark is perfect!" "Hunting for gold nuggets? Sand Shark all the way!"
Alright I'm done for real this time, tired of stooping to Terrys level...