m1555. Metal objects interact with the search coil of the detector, changing its inductance, dissipate energy through eddy currents etc. uk/bfo. A BFO system uses two coils of wire, with the larger coil acting as the search head and the smaller piece kept inside the control box. Simple BFO metal detector ...
from Google Alert - metal detectorhttps://www.google.com/url?rct=j&sa=t&url=http://www.ialsnet.org/xxotibur/roeiduwe.php%3Faltr%3DBfo-Metal-Detector--Metals--t&ct=ga&cd=CAIyGjBmN2Y1NDMwZGU1NzA5Mzc6Y29tOmVuOlVT&usg=AFQjCNGanHys4Ebwlq8E3kN7UI_w7hLWUg
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