How to choose the mesh size of a filter?

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The mesh count refers to the number of holes per inch (25.4 millimeters) of screen length. The higher the mesh number → the more holes there are → the smaller each hole becomes → the higher the filtration precision, allowing it to capture finer particles. The lower the mesh number → the fewer holes there are → the larger each hole becomes → the lower the filtration precision, but the fluid can flow more easily and is less likely to get clogged. Key factors in choosing the filter mesh size 1. What is being filtered? How large are the solid particles that need to be filtered? This is the most fundamental reference. Coarse filtration: such as leaves, insects, and large particles of sand and gravel (>1000μm); a mesh size of 10-40 is usually chosen. Medium-precision filtration: for fine sand, scale, and metal debris (100-500μm); 40-100 mesh is usually selected. Fine filtration: for pollen, fine dust, algae (10-100μm); typically, 100-200 mesh is selected. Ultra-fine filtration: such as bacteria, oil mist, smoke (