The NiCr penetrant test panels are ideal penetrant sensitivity comparators.
The panels are available with crack width of 10, 20, 30, and 50 microns and come in matched pairs. Individual crack sizes or a complete kit of all four sizes are available.
Having matched pairs enables "in use" penetrants to be compared against "new, unused" penetrants,in order to determine if the penetrants are performing properly. The panels are ideal for monitoring fluorescent penetrant (ZYGLO) lines.