Testing via Electrical Conductivity

As the name suggests, electrical conductivity provides information on 
how well a material conducts electricity. This non-destructive method 
provides information regarding the microstructure, mechanical properties 
and changes in composition. In industries such as aerospace, aluminum 
processing and precious metals, this plays a crucial role. The 
SIGMASCOPE® SMP350 is used, for example, for testing on aircraft wings. 
It was specially developed for measuring the electrical conductivity of 
non-ferrous metals or non-magnetizable metals in accordance with DIN EN 
2004-1 and allows conclusions to be drawn about the hardness and 
strength of heat-treated materials, among other things. The conductivity 
of aluminum alloys for anodizing processes can also be measured easily 
and non-destructively. The phase-sensitive eddy current method is used 
for the measurement.

With the SIGMASCOPE® GOLD B and C hand-held gauges, you can test 
non-destructively one of the most precious materials: gold. The density 
of the base material tungsten is almost exactly the same as the density 
of gold – but the electrical conductivity of both differs significantly. 
This type of non-destructive material testing takes advantage of this 
fact. For example, the measurement of electrical conductivity in 
accordance with DIN 50994 allows the immediate detection of 
counterfeits.