9/5000 Company's recent developments

Non-destructive, tactile coating thickness measurement on metal substrates can be roughly divided into two measurement methods:

• Measurement on a ferromagnetic substrate such as iron or steel: The type of substrate and the associated measurement mode usually have the brief designation Fe. The measurement methods utilised here are those that take advantage of magnetic induction. A magnetic field is generated by a permanent magnet or electromagnet and measured with a Hall sensor (electromagnet or permanent magnet possible) or a secondary coil (only electromagnets). 

• Measurement on non-ferrous or non-ferromagnetic but electrically conductive substrate such as aluminium, zinc, copper, brass and certain stainless steel types: This type of substrate and the associated measurement mode are designated with NFe. The eddy current method is utilised for this purpose.

• This allows coatings made of non-magnetic but electrically conductive layers such as chromium, zinc or tin on magnetic substrates such as steel or iron (Fe) to be determined. In addition, users can also determine the layer thickness of electrically insulating coatings such as paint or anodic coating on non-ferromagnetic but electrically conductive base materials such as aluminium (NFe).