magnetic locator...

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Is this design a magnetometer or?

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I have one.  Picked it up off Craigslist for $75 but then had to fix it.  It has quite a bit of circuitry.  It is very sensitive, often too sensitive actually.  I took it to Franconia to find meteorites and it was finding hot rocks all over the place.  Much easier to use than a metal detector because you wave it without paying attention much to height off the ground and it responds and pinpoints.  I found a bunch of magnetite but apparently no meteorite - I was on the south side.  I had a metal detector too and it sounds off the same things - we just didn't happen across the real deal.  When I first got it working it sounded off on my front lawn from a distance of 10 feet or more from a target.  I wondered what the heck it could be, as I created that lawn and built up the dirt underneath it years before.  It turned out it found a 1/2" piece of ferrite off a speaker magnet that I had broken on the driveway sometime before seeding the lawn. 

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		Quote:			Posted by bklein
	You are not allowed to view links. Please Register or Login http://www.schonstedt.com/index.cfm?page=GA-52Cx Is this design a magnetometer or?

The GA-52Cx and GA-72Cd Locators find iron
and steel objects underground. Both provide
audio detection signals that peak in frequency 
when the locators tip is held directly 
over the target. The GA-72Cd includes 
an easy-to-read digital and bar graph display
showing  signal strength and polarity.

The other literature says they are Magnetic Locators, not a conventional metal detector. So, yes it would be a function to the same purpose as a magnetometer, detection by sensitivity to magnetic fields. Its main purpose is to locate survey pins where the target is known to be iron-steel markers. Devices coined ,Magnetometer, are VERY sensitive to changes in magnetic fields and can react to large iron objects-deposits from a distance. This device has to be very close to the iron to detect it and can detect small iron object magnet fields where the magnetometer can not.



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I have a miners compass which is horizontal magnetic compass, a magnetometer of sorts. It easily detects large iron objects at 10-15 feet or more. By all accounts that I have read it works much better than a two-box metal detector. Small iron has to be close to it for any needle movement of course. With the use of the miners compass you normally orientate the the axis of the compass ninety degrees from the  earths magnet field for greatest sensitivity. The needle rotates inline with north south, digs down when the lines of the magnetic field are more direct to earth caused by the iron anomaly. It dips up when over nonmagnetic anomalies, caves, voids, large nonmagnetic mineral bodies &c. When you originate the miners compass so that it operates with the axis inline with the earths magnetic field it will only respond to the larger iron. The electronic magnetic field sensors are also orientation sensitive, most will sense changes in the horizontal and vertical magnetic field at the same time. Maybe you could use this to eliminate the smaller objects, orientate the device the opposite to instructions. If the device uses a electronic compass chip you could find out what model of it is and then get the tech sheet on it to see what its orientation parameters are. Maybe plotting the readings from several orientations would revel a few clues?  For the large iron can you drag it out of the search area? If the large iron can not be moved than something other then a magnetic field sensor might have to be used. I pinpoint with my backhoe sometimes.

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		Quote:			Posted by {author}
	Since the Magnetic locator has an audio, I can probably adapt it to Tim Williams, data logger, and use imaging software. But first, I need to know if this product will actually detect, and isolate the "field" of a small Iron cannon, buried 15 feet or more?

Dell,  I looked over their web site pretty good, not much in the way of details about the actual type or capabilities of their equipment. Maybe a phone call would sort it out. I do not think it would as it is made for close detection of iron pins. Here is an instrument that will definitely work on recording earth field anomalies.

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