Compared with the vibrating screen, the test sieve has a higher level of standardization on the mesh number and the pore diameter of the sieve. The test sieve is mostly used for analysis and laboratory inspection. The requirements for the screen frame are very high. Vibrating screens are generally accepted according to industry standards, while test screens are accepted according to national standards. Let's take a look at the conversion of the test sieve aperture and mesh number:
| mesh size |
standard mesh number/mesh |
mesh size |
standard mesh number/mesh |
| 4.75mm |
4 |
4.00mm |
5 |
| 3.35mm |
6 |
2.80mm |
7 |
| 2.36mm |
8 |
2.00mm |
10 |
| 1.70mm |
12 |
1.70mm |
12 |
| 1.18mm |
16 |
1.00mm |
18 |
| 0.850mm |
20 |
0.710mm |
25 |
| 0.600mm |
30 |
0.500mm |
35 |
| 0.425mm |
40 |
0.355mm |
45 |
| 0.300mm |
50 |
0.250mm |
60 |
| 0.212mm |
70 |
0.180mm |
80 |
| 0.150mm |
100 |
0.125mm |
120 |
| 0.106mm |
140 |
0.090mm |
170 |
| 0.0750mm |
200 |
0.0630mm |
230 |
| 0.0530mm |
270 |
0.0450mm |
325 |
| 0.04mm |
363 |
0.0038mm |
400 |
| 0.0025mm |
500 |
0.0020mm |
600 |
