What is the absolute deepest detector you have ever seen. (In your humble opinion)

[REVIER]

I must have had a dud f 70. It wasn't deep at all, I had the stock coil and the 11 inch did coil for it. The Omega was much deeper in my ground.

Strange.
Mine is so powerful and deep I think a turbocharger is mounted somewhere on this thing.

 

[MichiganJason]

The deepest detector I've ever used was a Whites Eagle Spectrum. You could really crank it up hot. You would get a lot of falsing too but it would find coins deep and the vdi was very accurate at depth. The ONLY reason I got rid of it was because of its use of C-cell batteries. They didn't last long and they're expensive. Otherwise I would be using it to this day. -Jay

 

[William1221]

Whites 6000 di pro SL 6 TO 8 inches on a quater no problem one of the best detectors Ive ever owned.

 

[Robert2300]

And what size coil u using? Lots of things influence the depth.

 

[ScottBuckner]

Seriously? A two-box detector. It's a detector overly-serious detecting guys use to search for caches buried several feet down and police departments drag across backyards and garage/house conctete pads and crawlspaces to search for dead bodies.

 

[pasttom]

Scott's post reminded me of a story. Our club is available to local law enforcement to look for items at crime scenes and have several times- actually finding spent rounds that may not have been recovered otherwise. We got a call from the next county North to do a search. We asked where and they said up in the hills. "What are we to look for?" "A body." "Well, we only detect metal." "Its okay he has keys in his pocket!" -Pass
Glad to learn we only needed a two box to take the job next time!

 

[bhouck2011]

Thats easy. Naultlis DMC IIb.

 

[Doctorcoinz]

Explorer SE found me a ten incher. Never got past 8 - 9 inches with other makes..

 

[Tallon]

I've been doing some air-testing with a Mikron NRG-110 and this darn thing will detect a nickel at about 16" from the bottom of the coil. Granted, you take it to a 'cleaned out' park or most any other solid, moderate to heavily mineralized soil site and the actual depth of detection may not be as great, but on medium mineralized soils, this baby will pick up a thin bobby pin at appx. 7" deep. Oh you say 'Well that's just detecting a piece of junk'. But remember, if it picks up thin targets that deep, think how deep it might find gold and silver jewelry from that depth and even deeper. It beeps on everything, like a Teknetics T2/G2(NOT FOR A BEGINNER) but each item has either a 'low-to-high' tone(junk), a solid low tone(iron nail or other iron), or a high pitch for gold rings, gold chains, silver/clad dimes, zinc or copper pennies, half dimes, quarters, halves, silver dollars, etc., etc. So if the discrimination is correctly adjusted, you (should) pick up a (lot) more stuff with this machine than with many of the detectors on the market today and find the stuff very deep at that. This machine hits as fast on individual targets as the Fisher F75 or the Teknetics T2/G2 too. Very, very quick recovery times in other words. Sorry guys, it does (not) have a screen along with all the 'bells and whistles'. Besides, what pops up on the screens of even the most expensive MD's can sometimes not be what you wind up digging. In other words, there have been many a time someone thought they had something nice according to a V.D.I. # and/or a bar popping up under a certain class of conductive targets and it turns out to be junk. So meaning to say, your 'good ole' hearing can be trained to tell the subtle difference between good and bad targets and sometimes even (more) so than a screen can decipher. Anything worth doing is worth (taking your time), doing (right) the first time. But if you want to blow through the site like your running a competition to see who's the fastest 'bad-ass' at finding the most, you (WILL) miss a lot of good, deeply buried stuff (GUARANTEED and almost EVERY time at that).... Swing speed, proper posture, ground minerals, wet or dry ground, density of the ground, settings, technique, position of the targets and/or their distance from the coil, concentrating on the sounds and not being distracted, making sure you have no EMF(from other detectors) and/or line interference and operator experience can and do, all play a (big) part in any coin hunter's success no matter (what) detector one uses. Some very experienced coin hunters with simple little vintage non-disc. T/Rs can sometimes out-find inexperienced users who are operating Minelab Explorers, Whites V3i's, etc. A good vintage T/R will null out most moderately-sized iron and still find almost all gold, regardless of size. It will find tin foil and p'tabs but to find nickels and much of the gold out there, you will want to dig p'tabs anyways. T/Rs will pinpoint with surgical precision with no need of moving the coil like a VLF detector. Remember, quality, not quantity is what counts.

 

[ironsight]

I've found many coins over a foot deep with my eTRAC/NEL Tornado coil. My record was a silver dime around 14 inches deep. Yes, the signal was beyond iffy but i dug it anyway on a hunch, almost abandoned the dig at one point when the hole was elbow deep. Sometimes those iffy's pay off.

But i have to say the deepest detector i've personally used were two 'L' shaped coat hanger wires. Those dam things found my well pipes at 3 feet.

 

[oneguy]

But i have to say the deepest detector i've personally used were two 'L' shaped coat hanger wires. Those dam things found my well pipes at 3 feet.

Yeah...coat hangers work well....too bad a guy can't coinshoot with them, hell of a lot cheaper than an etrac!....lol

merry xmas ironsight

 

[Mega]

If i am on a site that requires some extra depth say like on pasture i use the T2 with the SEF15x12 coil this i find not only gives me additional depth but being a VLF machine of course it gives me discrimination,currently working a permission that has 2 possible hoards on ie Roman and Celtic so when we are able to get back on site i will be using a Pulse machine with the 14x10 coil on,this should gain some extra depth as well but of course without discrimination.

But i also carry a Fisher TW-5 2 box setup although not a normal detector as such in the normal configuration ie shaft and coil,on my test bed it really does go the deepest,but of course the depth is also relative to the target size the bigger the target size the deeper it will go.Never been in a situation to use it to the full depth capability but it is pretty deep and i doubt that i would ever want to dig that deep anyway.

Of course these detectors could be seen as more specialised than the normal every day machine,but i would say the deepest normal machine i use is the T2,note i have not quoted exact or exaggerated depths,but i will also mention that in recent years i am finding that i am going to slightly smaller than stock size coils because most finds over here in the UK are only in the top 6''-8'',but the main reason for going smaller is the fact that due to back problems i cannot swing big coils for any length of time.

I am pretty certain that detecting and fishing have alot in common,my detector is much deeper than yours or my fish was way bigger than yours,who cares anyway its all about enjoying detecting and that in my mind is the bottom line.

 

[E.V.]

Nautilus DMC2 or 2BA or my old standby the 1266. the 1266 as well as the 1265 are awesome!

 

[salmonriverhotrock]

A number of times I've used a Bounty Hunter 505 with the standard coil held about a foot or two over pavement set on all metal to find buried on the ends highway 24 and 28 inch culverts. If you know what your listening for, you can hear the most of them at my guess of 5-6 feet under the pavement. From there, work your way out to the buried end and start digging to clear and open it up. Keeping about a foot or two off the surface gets rid of dealing with ground issues. On our section culvert inventory, of those we had not found visually, I discovered the rest but about two and that was because they had been laid in very steep so by the time they went under the road, they may have already been 20+ feet deep. We only found them later because the river lowered and exposed the outlets. From there, I was able to go back on the other side and search in the weeds for the inlets. One other was around 50 feet deep on a normal slope but it also was not exposed on the outlet until the river lowered. This culvert was also well over 300 feet long.

 

[C.J.M.]

Coiltek has a 3 kHz ---15" coil

 

[metalpopper]

[size=x-large]There's just too many variables to say which is deepest.[/size] ..TOM-CA pin-points it.!

Tom_in_CA, makes the most relevant comment ( in my humble opinion), regarding the original question;

Here are some of those variables, simply listed; without further explanation.

Loop DIAMETER.

TARGET size.

Target metal.

FREQUENCY of the a/c search-flux....or for a P.I. unit:...the PULSE REPARTITION RATE, and PULSE WIDTH.

The amplitude of the CURRENT, flowing in the loop.

The usable (noise free) GAIN of the signal-amplifier.

Last but not least;.........ALL-METAL detecting or DISCRIMINATING.????

Matt's 'Rule of thumb' for coin sized targets......say around 7 Khz a.c.....copper or silver......roughly 1.5 / 3 mm thick, (roughly)

LOOP DIAMETER multiplied by COIN's DIAMETER. (in inches)

i.e. 10 inch loop; 3/4 inch copper coin; distance, .... about (10'' x 0.75'') 7.5 inches....in air.....

The 'in soil' depth will be reduced by the ground's specific attenuation-factor.

An 18 KHz detector will proportionally improve that in-air range,especially on lower conductive metal.

Example being cu pro-nickle coins or thin-section gold alloys......ground ferro-mineralisation, will have greater effect.

Matt.

 

[TellYaWhut]

The deepest detector with correct ID is the Minelab Etrac. The t2 and f75 are also deep, but screen goes blank at depth. My old 1266 hit a quarter sized piece of aluminum (light bulb) at 16"....the bottom layer was sticky mud. There are quite a few deep metal detectors that only tell you if its non-ferrous..........you end up digging a lot of deep trash..... I'm too old for that.

 

[jspoon]

Sovereign GT with the SEF 10x12 Deeeeeep!

 

[Altamaha]

I've owned the Minelab Sovereign, every model of the Explorers, the E-Trac, CTX 3030, the Fisher 1260x, Fisher 1265x, Fisher 1266x, 2 Fisher CZ-3Ds (1021s), Fisher CZ-70 Pro, 3 Whites Eagle II SLs, Whites V3i, and without a doubt (generally speaking) coil size for coil size its the Fisher (1266x & CZ-3Ds). For accurate target ID on coins at depth its definitely the Eagle II SLs which will accurately ID and distinguish between clad and silver dimes, clad and silver quarters, etc. at 8 to 9 inches for instance (unbelievable).

HH

 

[doc holiday]

Guys there is a wealth of experience and info on these posts---thanks for the time and effort.