There are two types of Peenscan pens available, which stipulates Peenscan 220-2 pen for lower peening intensities and 220-6 pen for higher peening intensities.

In addition there is Fluoro-Finder III Tracer which only seems to come in one type.

We would prefer to use the latter as it enables us to get into all areas. But is there any guidance on usage based on is it is high or low intensity peening?

The ranges we do are as follows:

6-9A
10-14A
14-20A
6-8C
10-16C
16-18C