The reference test block 1, according to DIN EN ISO 3452-3, is used to check the display capability and define the sensitivity of penetrant testing equipment.
Depending on the thickness of the NiCr coating (10, 20, 30 or 50 µm), the control panels have different artificially produced, very fine cracks.
The scope of delivery consists of 1 panel each of 10,20,30,50 µm with test certificate.