The Wet Film Thickness Gauge WG is a hexagonal / octagonal measuring comb made of heavy stainless steel. The high-grade stainless steel will not be affected by acid or base elements. Models are available for several different applications.
SP 4000 WG-I 20 - 370µm in 24 steps (6x4)
SP 4010 WG-II 2000µm in 36 steps (6x6) with edge radius check (2mm)
SP 4020 WG-III 50 - 10,000µm in 72 steps (8x9)