PosiPen magnetic thickness coating gauge - video

[tonyfoale]

There are digital meters in the same price range measuring thickness on ferrous or non-ferrous with paints, plating or certain coatings.

For Xmas I got a digital ultra sonic thickness measurer. It works better than expected once I figured out how to use it properly. The documentation was naff. Where I could check measurements by other methods, calipers or mic, it proved to be quite accurate. It is an invaluable tool for checking thickness where you do not have access to both sides. It works on most metals and plastics. Some types of cast iron can not be measured due to reflections from voids and the carbon bits floating around.