Screen Size Comparisons
The chart below shows some international sieve size comparisons which may be of use from time to time. It also illustrates how confusing comparing sieve sizes can become. The confusion with size comparison, unfortunately, does not end with this example. Sieve manufacturers try very hard to come up with tightly controlled standards on their sieves. Even so, woven wire screens require some tolerance in their production. We have all heard stories about matched master sets of sieves, used on the same sample, unable to produce an exactly comparable result. To this may be added the discrepancies that occur when using different sieve shakers and laboratory techniques or, more frequently, damage caused by unsatisfactory cleaning of the sieves. Having experienced some of these problems and devel­oped systems to reduce their effect, Manley Bros. have sought to help minimize the problems of our customers in handling their test sieves by offering a free ultra-sonic test sieve cleaning and masterset matching service. If you think this service may be of use to you call us at today at 1-800-237-SAND.

Nominal Mesh Size In Microns	A.S.T.M. (1961)		Tyler  (1910)		B.S.S.  (1962)		D.I.N.  (1934)
	Mesh No.	Aperture in Microns	Mesh No.	Aperture in Microns	Mesh No.	Aperture in Microns	Mesh No.	Aperture in Microns
2400	8	2380	8	2362	7	2400		2500
2000	10	2000	9	1981	8	2000	3E	2000
1600	12	1680	10	1651	-	1590
1400	14	1400	12	1397	12	1400	4	1500
1200	16	1190	14	1168	14	1200	5	1200
1000	18	1000	16	991	16	1000	7	1000
850	20	841	20	833	18	850	-	-
800					1/32	790	-	-
750	-	-	-	-	-	-	-	-
700	25	707	24	701	22	710	-	-
600	30	595	28	589	25	600	10	600
500	35	500	32	495	300	500	12	500
400	40	420	35	417	36	420	14	430
350	45	354	42	351	44	355	18E	340
300	50	297	48	295	52	300	20	300
250	60	250	60	246	60	250	24	250
200	70	210	65	208	72	210	30	200
175	80	177	80	175	85	180	35E	170
150	100	149	100	147	100	150	40	150
125	120	125	115	124	120	125	50	120
100	140	105	150	104	150	105	60	100
90	170	88	170	88	170	90	70	90
75	200	74	200	74	200	75	80	75
65	230	63	250	61	240	63	90E	67
50	270	53	270	53	300	53	-	-
45	325	44	325	43	360	45	-	-
35	400	37	400	38	-	-	-	-

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