There are three major types of metal detectors, in ascending order of cost: Very low frequency (VLF), multi-frequency, and pulse induction (PI). Very low frequency detectors operate on one ...
[Huygens Optics] has a VLF-based metal detector that offers much more feedback than just a beep or no beep. This thing is fancy enough to discriminate between types of metal and report back a ...
There are three major types of metal detectors, in ascending order of cost: Very low frequency (VLF), multi-frequency, and ...
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