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I think I have found a very usefull device for you guys....

A

Anonymous

Guest
Not trying to sell anything. Just bringing this little beauty to your attention and a little thing I thought would be REALLY usful to a lot of detector folk.
I have seen a demo and it is actually very impressive.
Hardnose.
 
it sure seems a pain to use if you have to turn detector off at each use, and the only way you would know is if you bought one. The price of $1500, ouch. Not me..
 
Price quoted was aussie dollars approx $896 <IMG SRC="/forums/images/flag.jpg" BORDER=0 ALT="USA"> Still a bit to invest.
 
... then this thing would be well worth the money. The problem is I have my doubts that it can detect iron as deep as my GP Extreme 18" coil can. What I need is something that can tell me it is a can or piece of iron 2-3 feet down. The shallower stuff is not a problem as the GP can disc out most surface trash, and if it's less than a foot I do not mind digging it that much anyway.
But if it could be shown that the thing would reliably detect ferrous targets at a range equal to or in excess of what a good PI unit will do then $900 could get pried out of my wallet. I've tried units like the Fisher FP-10 and found they work well on long iron buried vertically, like a rebar, but do poorly on flat items and things like cans at depth.
Steve Herschbach
 
My interpretation of the description of the device on their web pages is that it is a magnetometer with a resolution of 1-2 nT. The interesting part is that the sensor head can be attached to the coil of the metal detector with only a minor effect on it's operation so it must have a low metal content. Obviously it is not a proton precession or fluxgate mag and the device can be plugged into an oscilloscope so perhaps they have used either hall effect sensors or magnetoresistors with one being mounted in either end of the sensor head to form a small baseline gradiometer or alternatively there is a sensor in the control box and one in the head although I'd say that's less likely because it would require omnidirectional sensors.
Nick
 
It sounds very interesting. When you read thier text they mention using it in conjunction with an SD2200 so I would think that the unit probably has pretty good depth ability. Using it along with a good PI is something that Eric Foster had mentioned a few years ago. Before Eric came over here to Findmall's PI Forum he had his own Forum. He had mentioned combing a PI and a Magnetometer into one detector giving you the depth ability of the PI and the ability to identify ferrous metals by the use of the Magnetometer Sensor Element. Seems like this company came out with a nice little magnetometer/gradiometer to work in conjunction with a good PI. Kind of cool that they even included a computer port so you could actually "see" the ground anomaly. With an adapter of some type you could probably run it into a PDA. So many possibilities so little time <IMG SRC="/forums/images/smile.gif" BORDER=0 ALT=":)"> <IMG SRC="/forums/images/smile.gif" BORDER=0 ALT=":)"> <IMG SRC="/forums/images/smile.gif" BORDER=0 ALT=":)">
HH
Steve
PS I enjoyed the story of your trip to Hawaii!!!!!
 
Does any body know how this ferros hound works,like whats in the atachment coil.
 
I had a look at this and I think the price tag makes it outside the ball game for most Gold prospectors... With that said the Infinium would be a better choice. From the technical side it is the same as the infinium... ie reverse discrimination... Can tell you when you have a ferrous object and nulls out when non-ferrous (ie Gold, Alumunium etc)... Just my 2c worth
 
I got the same impression re a magnetometer and
do remember that advances have been made in
getting these smaller and have read somewhere that
they now have dedicated chips for this,?
I had a brief discussion with this guy many
months ago and he seemed to be quite a clever boy.
I suppose it now comes down to how well it
actually works on the field and what shortcomings
it may have.
I wonder if a magnetometer could be used to find
faulting in the opal fields. If so then it may
have other applications.
 
After thinking about it a bit more I'd say it would have to use magnetoresistors, like you say these are available on chips these days. I don't think a hall effect sensor would be sensitive enough (unless they've made their own). As far as I know magnetoresistors are not really practical for general purpose earth field magnetometry due to non-linearity and so on but maybe with careful calibration you could make a small gradiometer that would at least tell you if there was a localised anomaly even if it didn't give you a super accurate sub nT figure like a fluxgate or PPM would. Very interesting device though !
 
The ferrous hound device is only practical with the smaller coils. With an SD or GP using any coil larger than 14" it can discrim only to half maximum depth. The magnetometer sensor head size limits its capacity. They should have interchangable heads to match coil sizes...silly really, they should have thought of that! Check out their new PI unit though!
 
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