Tesoro Sandshark air tests: chains (and a ring)

[nudels]

I did a few air tests with my sand shark, to see how it did with various chains and my ring for good measure. These are not scientific, they were not measured by micrometer, your mileage may vary, etc.. but what I did do was use a clear plastic ruler, held itagainst the coil, and did a simple wave test beneath the coil. These were my best guesses for the max depths attainable.

All used normal mode and medium threshold, and as noted depths were different depending on pulse width.

First up, three very thin chains that I could not detect no matter what I did, it would not detect even if I rubbed it against the coil:







Next I tried some herringbone, this one detected at .75 inch with a small pulse width, .5 with a medium and .25 with a large. These are real rough and my best guess as I didn't and couldn't get that accurate at those distances, they are just best guesstimates.



This one is a bit thicker, and detected much better, about 3 to 3.5" at all pulse widths:



Next up, a thinnish to medium twist chain, detected at about 1.5" with a small pulse width, and about 1" with medium and large pulse width:



Then I tried what I consider a medium thickness chain. This detected at about 2" with a small pulse width, about 1.75" with a medium pulse width, and about 2" again with a large pulse width:



And a large chain. Detected at 3" with a small pulse width, about 3.5" with a medium pulse width, and 4" with a large pulse width:



And finally, for kicks, my ring. It detected at about 7" with a small pulse width, 7.5" for a medium pulse width, and 8" with a large pulse width:




All in all, not bad. It seems that at about 2mm thickness the chains become detectable, below that it they are pretty much invisible. Ring depth is pretty good as well IMHO.

 

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[MrBling]

Interesting
I've been thinking about getting a Sand Shark- have you had much success with yours?
Also did you try folding the chain over itself, bunching it up etc?
I've found in air tests that can make a chain detectable when it was non-detectable stretched out
Whenever someone reports finding a chain here, I think I'll start asking them what position it was in
The only chains I've found thus far I'm sure were found by detecting the pendent

 

[MrBling]

Never mind on my first question-I found your post on your SandShark trial run. Thanks

 

[guzz1]

I had one ,,, and I found chains with it but not at great depth 2 to 3 inches , There a great pi for the money and warranty is outstanding ,,,,, Guzz

 

[nudels]

THe way I held the chain was bunched up, between my thumb and 3 fingers, not very tight but not very loose either.

 

[Foilman]

Thanks for posting your test.
Everybody should do this with their machine. It is a real eye opener. I already posted about the Excal 2. on this and results were similar to or worse than yours. It has been said the Tigershark is better, Maybe somebody could post the test with a TigerShark to show the real difference, if there is any.

 

[Sandman]

I sometimes use the Tiger Shark and it does have the ability to find small gold chains without pendants or large clasps at normal distances like 4 inches and better. However I don't listen for these sounds normally as it is the same sounds from birdshot. Most of the small chains I find are broken and have very little weight to hardly make it worth your time to scoop up all these tiny sounds. When I am bored I will retreive the small targets.