H3Tec says they work by the principle of "nano-ionic resonance".
Let's see what "nano-ionic resonance" brings us from google. There are not a lot of entries so it should be easy ...
Prime minister of Thailand warns against "magic wands" killing people instead of detecting bombs. The GT-200 and other models are said to work on the principal of ‘magnetic molecular resonance’ or ‘nano ionic resonance’ and or ‘dia/para magnetism’.
http://www.andrew-drummond.com/2010/...outh-thailand/
Blog site warns about H3Tec and others who market fake explosive detectors:
http://sniffexquestions.blogspot.com...-military.html
First place scum of the minute award for H3Tec:
http://www.skepdic.com/news/newsletter103.html
Win a $159.99 Sedu Revolution Nano Ionic Tourmaline Flat Iron! ...nano-ionic beauty appliances

???
http://www.flathairstraightener.com/nano-ionic/
Some guy in "The Dead Horse forum" ran across H3Tec advertising and responds
"What a load of horse$hit buzzword slaptogether to confuse the rubes...":
http://www.pso-world.com/forums/show....php?p=2494040
Then, at the H3Tec website we find a video that explains their idea of "nano-ionic resonance":
http://www.h3tec.com/H3promo.html
According to the H3Tec video,
nano ionic resonance works by measuring the spin rate by using the positively and negatively charged ions in an atom called cations and anions, this new device can literraly lock onto elements or combinations of elements called compounds. This has been called Nano Ionic Resonance, or NIR by H3Tec, and is what makes the device tick.
Each unit is powered by two 9 volt batteries that will run the device for up to eight hours.
To locate an element, a software interface is first used to upload that element's data, say gold to the H3Tec detector. The detector is powered on and its range is set to define the grid to be scanned. Immediately the detector begins scanning for gold. If gold is within the defined detection grid, the gold element itself is physically excited and energized by the H3Tec signal. There is a shifting of the atom, and a moment of angular offset. The atom starts making unique detectable noise that the H3Tec can listen to. The H3Tec then closes its listening circuit and locks onto the targeted element of gold. NIR technology doesn't rely on radio waves for transmission. Instead, it uses the magnetic field naturally supplied by the earth. As a result, the H3Tec detector can penetrate earth, metals, plastics, and water to locate any element or compounded elements found on the periodic table. The current device will detect targets up to ten miles away.
So we see H3Tec is not talking about conventional magnetic resonance or resonance related to recent optical developments with nano particles. In fact, their representation of nano-ionic resonance is not consistent with H3Tec's forum post which claims the device works by detecting isotopes of the element.
http://www.geotech1.com/forums/showp...2&postcount=70
If you read his statement, you will see he is saying silver with isotope 107 cannot be detected if your H3Tec is set to detect silver 109. (ie: Carl's silver bar that they couldn't detect had isotope 107... no wonder they couldn't detect it... they were set to isotope 109!
Are we really that stupid?
It is easy to find that all silver on earth has 51.839% Ag107 and 48.161% Ag109 regardless of what it is alloyed with, or what manufacturing process it has been through, or what it is compounded with. The only exceptions are a few exotic silver isotopes that only exist for extremely short periods in a laboratory before they decay into cadmium or lead. We see this "isotope excuse" has no truth to it, or if it did, then everything scientists learned about silver isotopes is completely wrong. It would mean that Carl's silver bar has no Ag107 in it instead of the same amount as silver coins have!
So much for the fake excuse about isotope deficiency...
But wait.... How is it that the principle of operation changed from isotope recognition to "nano-ionic resonance"?
Is this a newer buzz word that sounds cooler than isotope detection?
Maybe they borrowed it from the Geotech forum... (ionic detection, MFD, ionic resonance, etc.), and added nano to make it sound more high tech?
We can see from their explanation, they are not talking about using a mega-gauss coil in the same manner than an MRI machine works. But it appears Rudy is correct... it takes more than two 9-volt batteries to cause a perterbation of atoms, especially at a distance from the apparatus that is (allegedly) causing the perterbation. To get an idea, look at what kind of power a proton percession magnetometer uses... and take note that the atoms that are being preterbed are contained within the appartus. Could it possibly work if the medium being preterbed was a few feet away from the magnetometer, or a mile?
Not with a pair of 9-volt batteries designed to last 8 hours it couldn't! Two 9 volt batteries running 8 hours couldn't even maintain the strength of the earth's magnetic field, and the magnetic field of the earth is no where near strong enough... Rudy is correct.
But let's suppose there is some mysterious science we don't know about that causes the H3Tec to work as advertised. If this were true, then somebody would be able to demonstrate it working. We would not hear reports from Carl and Tim Williams that it failed to find a silver bar and coins during the factory demonstration. We wouldn't hear reports that H3Tec customers are sending their units to Carl for performance evaluation if they really did what they are advertised to do.
And we would see that they can pass the same test that a toy metal detector can pass to determine which of 10 pieces of plywood a silver coin is hidden under.
Can the H3Tec do that?
Can anyone demonstrate it finding which piece of plywood Carl hides a silver dollar under?
Are you ready to send your $10,000+ for an H3Tec locator?
Best wishes,
J_P