Which metal most closely emulates a gold signal to a PI machine?

[gunslinger44]

Looking to make some test targets to bury, I have a GPX-5000 for reference. What coins could I use to best emulate gold? Nickels? Aluminum tabs?

 

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[TheGreenBoy]

Aluminium is close enough. Specific resistivity of gols is 2.4E-8 ohmm and Aluminium has 2.8E-8 ohmm at 20°C. That is close enough.

 

[ARC]

How about gold ? heh

Gold emulates gold pretty well I would say :P

I mean... um... was this a trick question ? ? ?

not to be a smart arse... but um...

 

[Terry Soloman]

Lead. A bullet sounds Exactly like a nugget.

 

[TheGreenBoy]

With 1.9E-7 ohmm, lead is way more off than Aluminium. However, we need to bear in mind the "gold" in jewelerry actually comes in many different alloys, the electrical properties will differ as concequence. Furthermore, the magnetic picture seem by the instrument doesn't depend on the specific conductivity of material alone, there is also geometry and orientation. So the "gold" response may strach quite widely on the detector.

If you need to set the delay and sampling window on PI, a piece of aluminium will do, a can tell first hand.

 

[signal_line]

Most metals bleed a halo around them. That's why you look for small, sharp responses.

 

[Jim in Idaho]

I'm with Terry. Lead, for a given weight, is much closer to gold, for size, than aluminum. It's also close enough as far as conductivity. Nickel is good, too, though the density problem is still there.
Jim

 

[TheGreenBoy]

If you intend to look for a modern jewelerry with a PI, you'll be much better off with a VLF.

 

[TheGreenBoy]

I'm with Terry. Lead, for a given weight, is much closer to gold, for size, than aluminum. It's also close enough as far as conductivity. Nickel is good, too, though the density problem is still there.
Jim

With the power induction, it's the cross section threw the changeing magnetic field and the resistance of the conductor what metters, rather then the density of the material the conductor is made of.

 

[Jim in Idaho]

With the power induction, it's the cross section threw the changeing magnetic field and the resistance of the conductor what metters, rather then the density of the material the conductor is made of.

yes, but size matters.
Jim