btw. since the dam-flooding of this sea around 7.600 years ago through the Bosphorus the black sea (before it was non salty water only) is a part of it but with its own special water situation (with well preserved finds and non salty water near the ground - you might wanna know this as a treasure-hunter).
Just for information:
Even the Garrett Pro-Pointer gives a signal if you hold em against a red brick-stone.
This is because it has no ground-balance,
it starts to beep or vibrate if the outside situation influences the internal EM-field strong enough
no matter if plus or minus field-values.
And I'm not shure if a Pinpointer should have ground-balance.
For extremly high mineralized soil it would give more sensitivity but on the other hand - well:
It complicates the work with the Pin-Pointer and usually such little helper will just point more closely
to the already detected find anyway - so it doesn't need "special powers" - while the find has been already detected.
What really works good for high sensitivity is a "direct EM-field situation adjustment" so if you switch on the PP
while it is already directly in touch with high mineralized soil it is set to the quiet zone
and ignores the mineralization but if it moves (still directly in touch with the soil)
closer to the find it recognizes that there is a metal object there.
This means "auto adjustment" and it makes a difference if you switch on the
pinpointer in air versus while its already sticked into mineralized soil or close to it.
The Garrett Pro-Pointer does this auto-adjustment every time fresh after switching it on.
And the coils shape of the Pinpointer also has to be useful so it can penetrate into the ground,
otherwise its more like a little ground scanning MD for small things that doesn't fits very good into digging holes.
Anyway, nupi - if your Pinpointer is really sensitive it has to find a 1mm soldering-tin ball or such
a small piece of 1mm wire if you hold it against the plastic housing, like a modified Garrett Pro-Pointer can
and I know from alot personal search experience that such kind of sensitivity level really often is needed!
Good luck to your business startup - I hope you will add more stuff to your available
sortiment of products because I guess you really have the potential, insight and knowledge
for the whole professional range if you start already such good with the "little" things.
But pinpointers are not "little" under real circumstances, they're around 20-35 % of the whole deal
and make treasure-hunting alot more effective and time-saving.
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