I have several small fragments of a meteorite (Nantan Meteorite) which I like to run under my different search coils to see if in fact they will respond. Now meteorites can be composed of different elements and compounds. The Nantan meteorite is mostly composed of iron & nickel, with a high concentration of iron oxide, depending on what portion of the core meteorite that the fragment is from. So far, the ACE 250 will only pick it up with the sniper coil up to about 1/2". barely a whisper on the stock coil. The Scorpion will hit it with the larger stock coil at about 2 " with the sensitivity cranked right up in all metal mode and also the audio cranked up. The Infinium read it up to about 4 inches with the stock 8": mono coil and threshold up to about 5-6.
So, the AT Pro will give a comparable reading on this piece of meteorite similar to the Scorpion.
So, the AT Pro will give a comparable reading on this piece of meteorite similar to the Scorpion.