Wet film cards can measure the thickness of paint, enamel, glue, etc. sprayed onto smooth surfaces. Implementation standards: ASTM D4414; BS 3900: C5; IS0 2808

Simple operation, easy to clean and reuse
| Instrument model | numerical value |
| CO100-1 20-370μm | 20,30,40,50μm |
| 60,70,80,90μm | |
| 100,110,120,130μm | |
| 150,170,190,210μm | |
| 230,250,270,290μm | |
| 310,330,350,370μm | |
| CO100-2 25-2000μm | 25,50,75,100,125,150μm |
| 175,200,225,250,275,300μm | |
| 350,400,450,500,550,600μm | |
| 650,700,750,800,850,900μm | |
| 950,1000,1100,1200,1300,1400μm | |
| 1500,1600,1700,1800,1900,2000μm | |
| CO100-3 25-3000μm | 25,50,75,100,125,150μm |
| 175,200,225,250,275,300μm | |
| 350,400,450,500,550,600μm | |
| 650,700,750,800,850,900μm | |
| 1000,1100,1200,1400,1600,1800μm | |
| 2000,2200,2400,2600,2800,3000μm |