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A Question about Depth
Posted by: otlew
Date: October 16, 2011 03:04PM
This is not about which make of detector but rather about PI vs. VLF.

All things being equal, same target and location, matched coil size. How much deeper would you expect a PI unit to be over a VLF?

Let's say a VLF can acquire a low conductor target at a maximum of 8", would the PI see it at 10,12 or even 14" where the VLF could not?

I know this may hard to quantify, but I am just looking for a ballpark figure, from your personal experience.



Edited 1 time(s). Last edit at 10/16/2011 03:07PM by otlew.

Re: A Question about Depth
Posted by: Tony
Date: October 18, 2011 07:41AM
From personal experience using PI's such as the Minelab SD2200, Goldquest SS and a friend's Deepstar II, I can state that my Minelab Sovereign GT in All Metal PP mode was as deep as any of those machines in a beach setting.

The advantage will favour PI's when ground minerals come into the equation.....black sands on the beach or in our Aussie goldfields.

Plenty will laugh at my claims but they are from first hand blind tests.

I hope this goes some way to answering your questions above.

On a side note, I am 100% certain that a typical coin/ring sized target cannot be seen beyond 16".
This does not count for green crusty coins that are essentially twice their normal size.
A coil size of about 11" is also the optimum size for if you are chasing these targets.

Tony.

Re: A Question about Depth
Posted by: Hobo lobo
Date: October 19, 2011 12:08AM
I agree, most good vlf detectors in all metal will air test about the same as a PI, The difference is when wet salt sand and or mineralization enter the picture, then the PI spanks the VLF. A multi freq vlf ( ML Sov, Exp, or a CZ) will preform better in those conditions than a single freq. Can't really ans yourquestion, depends on conditions.

Re: Are You Oran T Lewis
Posted by: Genesis Events
Date: October 19, 2011 05:27AM
HI there

I know this is out of context but are you Oran T Lewis who teaches API 570 etc?

Regards
Genesis Events

Re: Are You Oran T Lewis
Posted by: otlew
Date: October 19, 2011 03:46PM
Thanks everyone for your responses. Now I understand the meaning of deeper regarding the two technologies.

Re: Are You Oran T Lewis
Posted by: otlew
Date: October 19, 2011 03:49PM
Yes

Quote
Genesis Events
HI there

I know this is out of context but are you Oran T Lewis who teaches API 570 etc?

Regards
Genesis Events


Re: A Question about Depth
Posted by: rarysgaard
Date: October 19, 2011 07:12PM
I was out hunting with a HHPI in fresh water lake about a month ago and found 2 rings that were quite deep. This lake is pounded hard. I really doubt that I would have found it with my excaliber which is my primary water detector. My buddy was detecting with his cz20 & was not getting signals. I was using an 8" coil & I firmly believe it to be a lot deeper. Just my opinion. Spoke to another detectorist last night who only hunts with an excaliber w/10" coil & he consistently finds old jewelry & old coins. He states he doesn't hunt in all metal, so I guess it still up for debate.

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Re: A Question about Depth
Posted by: OldBeechnut
Date: October 27, 2011 01:38PM
Condition affect which work the best, Where I have tested the difference is from 1 to 4 inch's in favor of the PI"s, being the size of the coil, target description and matix of the sand has a affect on all. PI's used Infinium, Sea Hunter, and the DF.....Headed up to the Jersey's beach's in Janurary to meet up with a couple hunters that use PI's, Be taking the Excaliburs, not really a competetion but a test to see how well the Amped Excalibur does on the Jersey Beach's, One thing about the amped excalibur it will get most of the targets the PI's get but they are not targets that stand out..you may pass them if you did not know they were there. The only changes from the last time I tested the gang to now is one of the Excals sports a WOT...

Re: A Question about Depth
Posted by: goodmore
Date: October 27, 2011 03:49PM
A few inches would be my guess. That is comparing a PI to an Excalibur or CZ 21.

The reason I listed those two detectors is because they are waterproof. To me a PI belongs in the wet sand and water only.

A few inches can make all the difference. Getting as deep as possible is the name of the game.

There are a few PI units out there that are just really powerful and deep. They cost more too.



Minelab Detectors

Re: A Question about Depth
Posted by: Hobo lobo
Date: October 28, 2011 10:38PM
I too have a couple of CZs, but they are still VLFs and not a deep as a PI Iin mineralized ground

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