A calibrated wheel fitted with an eccentric inner disc is rolled on the wet film until a trace appears on the inner disc.

The wet thickness measurement corresponds to the position of the end of the impression.

VF2255: model from 0 to 100 µm

VF2256: model from 0 to 300 µm

VF2257: model from 0 to 600 µm

VF2258: model from 0 to 1000 µm