Bottle Caps

[Jonny]

I often hunt in dry sand at the beach (Tesors Bandido II Umax). I can discriminate out iron nails ect. from burnt pallet but the beer caps still ring up loud and clear, why is this? Jonny

 

[Mirco]

I often hunt in dry sand at the beach (Tesors Bandido II Umax). I can discriminate out iron nails ect. from burnt pallet but the beer caps still ring up loud and clear, why is this? Jonny

They are iron also. Strange!

 

[Bob S]

The Bottle Caps are made of a different metal alloy than nails so the detector will read them different.
Sometime they even will come across sounding like a Quarter if they are bent.

 

[Jonny]

I have often mistaken them for clad. Do you know what the other metals in the alloy are?

 

[Mirco]

On Dual Field they sound like quarters.

 

[Boris]

My Xterra would discriminate them out but I borrowed a Tesoro it will not. I don't mean to badmouth the tesoro in any way because I was very impressed with it and plan to buy a used one if I can find it for a backup.

 

[tabdog]

Bottle caps are made of all kinds of materials.

That's one reason it's so hard to completely disc them out.

If you disc them all out, you'll have turned off most the good targets.

I don't care how good a notch you got. It will have to notch from alum to above dime.

Lots of them are aluminum. Some have zinc and so on. Some rust, some don't.

I have the best results when I first dig them and maybe get a handle on what kinds
are prevalent. Then I know what they sound like and can decide to dig or not. This
is how I discriminate everything, except, I occasionally disc out iron in bad places.

I disc with my mind. That is the most important tool in anyone's arsenal. It's the only
one I can not do without,

Tabdog

 

[Uncle Willy]

Yeah my Garretts will knock them out but not the screw caps.

Bill

 

[Uncle Willy]

Yeah Tab detecting is 10% machine - 90% operator.

Bill

 

[Eu_citzen]

I don't mind digging bottle caps as on my DFX many copper coins read the same thus a good chance it being a coin.

As Tabdog said not all are iron, some have a thin covering of another metal. (i.e. zink as someone said)

The zink is to prevent a too quick rusting of the iron.