I need a detector that does not mind getting wet in Salt Water and Fresh water. My current "Go to" does not have a waterproof housing and I am hesitant to go more than knee deep.
I am considering one of the following detectors (in no special order). Garrett AT Pro, Garrett Sea Hunter Mk-II, and maybe a Tesoro Sand Shark.
I read some real horror stories on the forums about The AT Pro and Salt Water. Also some very bad reviews About Tesoro Customer Service.
I realize that the AT Pro is VLF and the other two are PI machines.
Any advice is appreciated. Give me the Pro's and Con"s on the AT Pro and Salt Water Beach and Surf Detecting. Any experience you have had with either of the other two detectors also. I would like to have the Minelab Excal II but that is greater than my budget. Havent found enough clad to pay for one. LOL.
I hear tell the salt water/wet sand issue has been going on since the AT Pro has been introduced, so I contacted Garrett and they responded;
Thank you for your purchase of Garrett products. We are happy that you`re pleased with your AT Pro. In order to get the best performance in your salt water beach environment , Garrett suggests you use a PI detector ( pulse induction ) instead of a VLF detector. As mentioned in the owner`s manual , the saltwater environment is challenging for any Continuous Wave (VLF) detector, and the Garrett engineers have developed the best state of the art machine available on the market today designed to deal with these conditions.
and
Second , is the AT Pro equal in both saltwater and fresh water ? Not completely , no.
Third , will the AT Pro perform equally well at wet salt sand / water beaches detecting small gold? No.
And fourth , if not , why not ? To condense the answer to this , it is because of the relative conductivity of saltwater and small gold ( they are almost identical ) . You have certain lines of defense to deal with saltwater when engineering a metal detector. Detectors respond to the relative conductivity of targets.( saltwater is conductive and looks like a thin foil to a detector ) You first have to design your coil , we made the DD coil , best for dealing with the highly mineralized salt water and mineralized soils with its narrow search field. It is a form of suppression. Next , there is Ground Balance . It is best described as adjusting a phase or phase shift. The goal is to be able to maintain a search field while basically overlooking or (ignoring ) the surrounding medium yet still finding the preferred targets. . (ie: ground minerals or in this case saltwater). Then you have discrimination. (ie; the pixel notch ) . This is necessary when you are looking for targets that are basically the same conductivity as your search field medium. You must deal with the conductivity of the salt water which is equal to your small gold. It is unlike searching for a needle in a haystack , yet more like searching for a needle in a stack of needles. No current VLF machine can do what you`re asking. Engineers are always creating and experimenting with new ideas. I hope this will help in your quest for answers.
I received this right from Garrett
You are not alone. I knid of have gold jewelry has one of my primary targets, but gold blind?
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