Sifting Solutions

Mesh to Micron Reference for Botanical Screening

This reference index covers 50 common mesh values used in botanical screening, pollen collection, dry sift separation, and powder grading. Each page pairs a nominal opening value with practical process guidance so operators can compare coarse, medium, fine, and ultra-fine screen selections quickly.

Technical Visual

Dry Sift Screen Reference Layout

This image anchors the page to a real screening product format. Use the mesh directory below together with the nominal opening, wire diameter, and open area values to compare which screen grade belongs in the front-end, production, or finishing stage of a botanical separation workflow.

Dry sift screen set used as a visual reference for mesh screening layouts

Coverage

10 to 500 mesh

A build-time directory of common working values for North American and export-oriented botanical processing lines.

Data Basis

Nominal clear opening

Values are presented as engineering references. Actual openings vary with weave style, wire diameter, and supplier tolerance.

Use

Selection support

Use the table and grouped links below to move from rough pre-screening to fine fraction control without jumping between disconnected charts.

Browse by Working Range

Grouped by practical process intent so engineers and buyers can enter from the part of the screening range that matches the job.

Coarse Pre-Screening

Built for front-end cleaning, bulk fraction removal, and high-throughput separation before tighter grading stages.

10 mesh 12 mesh 14 mesh 16 mesh 18 mesh 20 mesh 22 mesh 24 mesh 25 mesh 26 mesh 28 mesh 30 mesh

Production Sifting

Common working range for pollen collection, dry sift separation, and general powder grading.

32 mesh 35 mesh 36 mesh 38 mesh 40 mesh 45 mesh 46 mesh 50 mesh 60 mesh 65 mesh 70 mesh 75 mesh 80 mesh

Fine Grading

Used when operators need cleaner fraction control and lower oversized carryover in botanical material handling.

90 mesh 100 mesh 110 mesh 120 mesh 130 mesh 140 mesh 150 mesh 160 mesh 170 mesh

Laboratory Classification

Fine particulate and precision classification range for low-throughput, high-control screening tasks.

180 mesh 200 mesh 220 mesh 230 mesh 240 mesh 250 mesh 260 mesh 270 mesh 280 mesh 300 mesh 325 mesh 350 mesh 400 mesh 425 mesh 450 mesh 500 mesh

Quick Conversion Table

A compact index for mesh, micron, millimeter, inch, wire diameter, and open area values.

Mesh	Micron	Millimeter	Inch	Wire	Open Area	Page
10	2000	2.00 mm	0.07874 in	0.540 mm	62.0%	View page
12	1700	1.70 mm	0.06693 in	0.417 mm	64.5%	View page
14	1410	1.41 mm	0.05551 in	0.404 mm	60.4%	View page
16	1190	1.19 mm	0.04685 in	0.398 mm	56.2%	View page
18	1000	1.00 mm	0.03937 in	0.411 mm	50.2%	View page
20	850	0.850 mm	0.03346 in	0.420 mm	44.8%	View page
22	800	0.800 mm	0.03150 in	0.354 mm	48.0%	View page
24	710	0.710 mm	0.02795 in	0.348 mm	45.0%	View page
25	680	0.680 mm	0.02677 in	0.336 mm	44.8%	View page
26	650	0.650 mm	0.02559 in	0.327 mm	44.3%	View page
28	600	0.600 mm	0.02362 in	0.307 mm	43.7%	View page
30	550	0.550 mm	0.02165 in	0.297 mm	42.2%	View page
32	500	0.500 mm	0.01969 in	0.294 mm	39.7%	View page
35	475	0.475 mm	0.01870 in	0.251 mm	42.8%	View page
36	450	0.450 mm	0.01772 in	0.256 mm	40.7%	View page
38	425	0.425 mm	0.01673 in	0.243 mm	40.4%	View page
40	400	0.400 mm	0.01575 in	0.235 mm	39.7%	View page
45	355	0.355 mm	0.01398 in	0.209 mm	39.6%	View page
46	350	0.350 mm	0.01378 in	0.202 mm	40.2%	View page
50	300	0.300 mm	0.01181 in	0.208 mm	34.9%	View page
60	250	0.250 mm	0.00984 in	0.173 mm	34.9%	View page
65	230	0.230 mm	0.00906 in	0.161 mm	34.7%	View page
70	212	0.212 mm	0.00835 in	0.151 mm	34.2%	View page
75	200	0.200 mm	0.00787 in	0.139 mm	34.8%	View page
80	180	0.180 mm	0.00709 in	0.138 mm	32.2%	View page
90	165	0.165 mm	0.00650 in	0.117 mm	34.2%	View page
100	150	0.150 mm	0.00591 in	0.104 mm	34.9%	View page
110	135	0.135 mm	0.00531 in	0.096 mm	34.1%	View page
120	125	0.125 mm	0.00492 in	0.087 mm	34.9%	View page
130	115	0.115 mm	0.00453 in	0.080 mm	34.7%	View page
140	106	0.106 mm	0.00417 in	0.075 mm	34.1%	View page
150	100	0.100 mm	0.00394 in	0.069 mm	34.9%	View page
160	95	0.095 mm	0.00374 in	0.064 mm	35.8%	View page
170	90	0.090 mm	0.00354 in	0.059 mm	36.2%	View page
180	80	0.080 mm	0.00315 in	0.061 mm	32.1%	View page
200	75	0.075 mm	0.00295 in	0.052 mm	34.8%	View page
220	68	0.068 mm	0.00268 in	0.048 mm	34.8%	View page
230	63	0.063 mm	0.00248 in	0.047 mm	32.5%	View page
240	61	0.061 mm	0.00240 in	0.045 mm	33.2%	View page
250	58	0.058 mm	0.00228 in	0.044 mm	32.5%	View page
260	56	0.056 mm	0.00220 in	0.042 mm	32.7%	View page
270	53	0.053 mm	0.00209 in	0.041 mm	31.8%	View page
280	52	0.052 mm	0.00205 in	0.039 mm	32.9%	View page
300	48	0.048 mm	0.00189 in	0.037 mm	32.1%	View page
325	45	0.045 mm	0.00177 in	0.033 mm	33.1%	View page
350	42	0.042 mm	0.00165 in	0.031 mm	33.4%	View page
400	38	0.038 mm	0.00150 in	0.025 mm	36.0%	View page
425	34	0.034 mm	0.00134 in	0.026 mm	32.4%	View page
450	32	0.032 mm	0.00126 in	0.024 mm	32.1%	View page
500	25	0.025 mm	0.00098 in	0.026 mm	24.0%	View page

Engineering Note

This chart is intended as a process reference for comparing nominal clear opening values. Final procurement decisions should still be checked against the actual weave specification, wire diameter, cloth thickness, and supplier tolerance supplied on the production drawing.