Hi landman,
the main thing is, seen from their signal-output behaviour, that P.I. detectors can be compared with
non-motion detectors because usually they do not have any stuff like automatic ground balance.
This means that if you put the PI on a table and also the coil some distance away
and you enter the coils-EM-field with a metal object it works great and nice results,
but if you walk with such coil over terrain, especially highmineralic or rocky areas,
you will directly hear the smallest coil-ground-distance and mineralization differences.
With smaller coils not so a problem but if you wanna swing the 1m frame coil in the jungle
you really need alot experience first for geting no failure-signals.
And of course the battery-consumption is high and the metal discrimination bad.
I can not speak about the Deep Tech Pioneer 4500 but the german company Lorenz is know as expensive
but of course reliable quality.
The price here is 5.200 Euro (info in german):
http://nuggets.at/LORENZ-Z1-Z-1-Deep...Metalldetektor
or google translated in english:
http://www.google.com/translate?u=http%3A%2F%2Fnuggets.at%2FLORENZ-Z1-Z-1-DeepMax-Gold-Metalldetektor&langpair=de|en&hl=de&ie=UTF8
I have translated and attached the depth-info:

There also is available the additional data-logger software for 3d profiles,
seems it costs additional 1300 Euros:
http://nuggets.at/LORENZ-Z1-Z-1-3D-GPS-Data-Logger
landman, if I where you try first a P.I. that just costs you 1.000 - 2.000 bucks and afterwards decide
if you really wanna invest more than 5.000 Euros or 7.000 dollars in such a system.
Are these prices really reasonable - look here, a double frame 1m coil for 1.500 Euros:
http://www.google.com/translate?u=http%3A%2F%2Fwww.nuggets.at%2FLorenz-Double-Frame-KIT-1x1m-Coil-Doppel-Rahmen-SuchSpule&langpair=de|en&hl=de&ie=UTF8
A few pipes of plastic and some cables going through normally doesn't costs that extremly much!
But buying a P.I. usually only makes sense if you really wanna use it with the 1m frame coil!
If you intend to use the most of the time the 25 - 45cm coils anyway better not go for a p.i.,
becauce the pro versus contra bill doesn't pays off, especially not if it cost you 5000 bucks plus.
If you just would need a nice chest-mountable P.I. to use for deep all-metal hunt with 45cm coil
I could recommend it (if it would costs just 1000-2000 bucks!), but this here is a different situation.
It's absolutly important that you have a good discrimination because first you wanna get to
a promising location where really is valuable stuff and it makes no sense if your detector
consumes time without end because it detects every piece of junk on your way.
The good thing of the Lorenz is that the electronic and battery is body-mounted so
hunting with the 45cm coil is very lightweight. This is the same feature the DeepHunter
offers and I can't stop to repeat how important it is for real extensive search-sessions.
It makes no sense if the detector is too heavy in your arms that after 3 hours
all motivation is gone because one or even both arms hurts like hell.
This is an issue especially if coils from 35cm to 50cm in size are used.
Using the 1m coil needs 2 persons and is easy, but this only works if the area is pretty flat.
At least as long as you don't have a wheel-modified 1m coil for the Jeohunter or DeepHunter
-
this is now absolutly cool because I can detect even 3cm small stuff while dragging
this thing over the floor but also the ultra-deep material and you are free to hunt without
second person.
btw. walking as a single person directly inside a 1m p.i. frame is not a good idea, too many disturbances.
And when I read this Lorenz Info:
- EMI suppression filter for search in areas with strong interference as city and industrial areas
it makes me wonder how e-smog interactive this detector really is - I would test it first how good it
works with EMI suppression on, because I have my doubts.
landman, if you know one who has a P.I. with 1m coil bury some testobjects and walk over with it.
Only that way you see the difference of the posted in-air depth values and in real.
P.I. also can "overload" the ground thats why you really exactly need experience with
the pulse-timing and other critical adjustments. Of course you also can't detect cavity with p.i.
which can limit your find-success to detect hidden stuff in holes, rooms, graves or other caves.
Another problem is that those lose 1m p.i. coil cables don't have a good inductivity.
Its like a wire that sends out a short heavy EM-field pulse and waits what comes back.
This wire must not have high inductivity because otherwise the pulse-frequency would be too short.
So the next problem occures - pretty low sensitivity with 1m coils including slow recovery speed.
Together with bad discrimination and not existing GEB you have the whole selection of contra factors
which really should make you think very hard first if you wanna invest directly over 5000 bucks for it
or if it isn't much better to test the whole "problematic" with a much cheaper P.I. or forget about it.
The only gain of P.I. is that "under really good conditions" it will penetrate high-mineralized soil better.
The coil-size - find-size relatio must fit, the ground has to be the same high mineralized everywhere,
discrimination has to be disabled and the manual P.I. settings need to be perfectly adjusted.
Including stuff concerning how comfortable is the signal-output for the user and how good can he reads it.
my advice:
If you don't have a chance of personally testing a p.i., don't buy it or just buy one for much less money than 5200 Euro !!!
And please if you test it, do it really intensive, outside with buried objects and not just with the 1m frame put on the table.
the main thing is, seen from their signal-output behaviour, that P.I. detectors can be compared with
non-motion detectors because usually they do not have any stuff like automatic ground balance.
This means that if you put the PI on a table and also the coil some distance away
and you enter the coils-EM-field with a metal object it works great and nice results,
but if you walk with such coil over terrain, especially highmineralic or rocky areas,
you will directly hear the smallest coil-ground-distance and mineralization differences.
With smaller coils not so a problem but if you wanna swing the 1m frame coil in the jungle
you really need alot experience first for geting no failure-signals.
And of course the battery-consumption is high and the metal discrimination bad.
I can not speak about the Deep Tech Pioneer 4500 but the german company Lorenz is know as expensive
but of course reliable quality.
The price here is 5.200 Euro (info in german):
http://nuggets.at/LORENZ-Z1-Z-1-Deep...Metalldetektor
or google translated in english:
http://www.google.com/translate?u=http%3A%2F%2Fnuggets.at%2FLORENZ-Z1-Z-1-DeepMax-Gold-Metalldetektor&langpair=de|en&hl=de&ie=UTF8
I have translated and attached the depth-info:
There also is available the additional data-logger software for 3d profiles,
seems it costs additional 1300 Euros:
http://nuggets.at/LORENZ-Z1-Z-1-3D-GPS-Data-Logger
landman, if I where you try first a P.I. that just costs you 1.000 - 2.000 bucks and afterwards decide
if you really wanna invest more than 5.000 Euros or 7.000 dollars in such a system.
Are these prices really reasonable - look here, a double frame 1m coil for 1.500 Euros:
http://www.google.com/translate?u=http%3A%2F%2Fwww.nuggets.at%2FLorenz-Double-Frame-KIT-1x1m-Coil-Doppel-Rahmen-SuchSpule&langpair=de|en&hl=de&ie=UTF8
A few pipes of plastic and some cables going through normally doesn't costs that extremly much!

But buying a P.I. usually only makes sense if you really wanna use it with the 1m frame coil!
If you intend to use the most of the time the 25 - 45cm coils anyway better not go for a p.i.,
becauce the pro versus contra bill doesn't pays off, especially not if it cost you 5000 bucks plus.
If you just would need a nice chest-mountable P.I. to use for deep all-metal hunt with 45cm coil
I could recommend it (if it would costs just 1000-2000 bucks!), but this here is a different situation.
It's absolutly important that you have a good discrimination because first you wanna get to
a promising location where really is valuable stuff and it makes no sense if your detector
consumes time without end because it detects every piece of junk on your way.
The good thing of the Lorenz is that the electronic and battery is body-mounted so
hunting with the 45cm coil is very lightweight. This is the same feature the DeepHunter
offers and I can't stop to repeat how important it is for real extensive search-sessions.
It makes no sense if the detector is too heavy in your arms that after 3 hours
all motivation is gone because one or even both arms hurts like hell.
This is an issue especially if coils from 35cm to 50cm in size are used.
Using the 1m coil needs 2 persons and is easy, but this only works if the area is pretty flat.
At least as long as you don't have a wheel-modified 1m coil for the Jeohunter or DeepHunter

this is now absolutly cool because I can detect even 3cm small stuff while dragging
this thing over the floor but also the ultra-deep material and you are free to hunt without
second person.
btw. walking as a single person directly inside a 1m p.i. frame is not a good idea, too many disturbances.
And when I read this Lorenz Info:
- EMI suppression filter for search in areas with strong interference as city and industrial areas
it makes me wonder how e-smog interactive this detector really is - I would test it first how good it
works with EMI suppression on, because I have my doubts.
landman, if you know one who has a P.I. with 1m coil bury some testobjects and walk over with it.
Only that way you see the difference of the posted in-air depth values and in real.
P.I. also can "overload" the ground thats why you really exactly need experience with
the pulse-timing and other critical adjustments. Of course you also can't detect cavity with p.i.
which can limit your find-success to detect hidden stuff in holes, rooms, graves or other caves.
Another problem is that those lose 1m p.i. coil cables don't have a good inductivity.
Its like a wire that sends out a short heavy EM-field pulse and waits what comes back.
This wire must not have high inductivity because otherwise the pulse-frequency would be too short.
So the next problem occures - pretty low sensitivity with 1m coils including slow recovery speed.
Together with bad discrimination and not existing GEB you have the whole selection of contra factors
which really should make you think very hard first if you wanna invest directly over 5000 bucks for it
or if it isn't much better to test the whole "problematic" with a much cheaper P.I. or forget about it.
The only gain of P.I. is that "under really good conditions" it will penetrate high-mineralized soil better.
The coil-size - find-size relatio must fit, the ground has to be the same high mineralized everywhere,
discrimination has to be disabled and the manual P.I. settings need to be perfectly adjusted.
Including stuff concerning how comfortable is the signal-output for the user and how good can he reads it.
my advice:
If you don't have a chance of personally testing a p.i., don't buy it or just buy one for much less money than 5200 Euro !!!
And please if you test it, do it really intensive, outside with buried objects and not just with the 1m frame put on the table.

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