Firstly, 100 micron means wire mesh screen opening is about 0.1 mm;
200 micron opening stainless steel mesh is about 0.2 mm.
100 micron opening size is smaller than 200 micron.
Secondly, let’s check the filter mesh size chart above to figure out the estimated mesh counts of each.
For 0.1mm opening, mesh number is roughly 150.
0.2mm opening size is about 70.
100 micron mesh screen has more openings per inch than 200 micron mesh. So 100 micron is finer than 200 micron.