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Originally Posted by Funfinder
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The OKM products are known to be gradiometers that use cheap fluxgate magnetometer sensors to sense the magnetic gradient in the area where it is positioned.
With the exception of the people who are intrested in selling these locators, most people find they do not help to locate buried gold.
Nobody who has opened an OKM detector has found evidence of any ion chambers, but they have found the fluxgate magnetic sensors.
Here is the sensor they found:
The appearance is the OKM detectors are demonstrated to show variations in the magnetic gradient, and are manipulated in a manner to fool the observers into thinking they are tracking gold rather than measuring small changes in the magnetic field. This is confirmed by the fact that the OKM detectors must be moved to scan only in a vertical direction after they are calibrated for a given compass direction. If they are rotated toward a different compass direction, the earth's magnetic field will throw them out of calibration so they must be recalibrated for the new direction. (This seems reasonable since the fluxgate sensors are positioned laterally to the side of each other, allowing vertical rotation only).
The text display on the detector also helps to convince a lot of people that there are secret circuits inside that lock onto gold. But the real proof is in the field where treasure hunters try it out and find out how well it works to locate buried gold. Nearly everyone who has tried an OKM product in the field on thier own has concluded it is a piece of junk that does not locate gold. But it can be used as a fairly good gradiometer. The problem is the cost is about the same as you pay for a used Mercedes Benz. Instead of buying an OKM detector, you could build a more sensitive gradiometer for about $200 or less.
Before you conclude the OKM detectos are finding gold, read these threads from the Geophysics forum from people who have actually used them and looked to see what is inside them:
http://www.geotech1.com/forums/showthread.php?t=15985
http://www.geotech1.com/forums/showthread.php?t=14775
http://www.geotech1.com/forums/showthread.php?t=13747
My opinion about how the OKM detectors locate gold:
I think anyone who believes the OKM will locate treasure for them while they are treasure hunting will be disappointed the same as the people who posted in the Geophysics forum. I would suggest you try out the OKM in your own hands in a location where you hide the gold away from other metal objects to see how well it works for you. Also try locating the shovel with the gold placed below it to see what you find. Then try it with the gold only, and
no shovel. If you are then convinced it is really finding treasure for you, you should buy it. But if you think it is performing like a cheap gradiometer, then maybe you would prefer to build your own gradiometer for a couple of hundred dollars.
Best wishes,
J_P