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Clean Room Standards
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ISO 14644-1 Cleanroom Standards

Mark Optics has an outer Class 8 cleanroom that tested at 13,000 – 18,000 particles size 0.5 um,
our inner room is a Class 6 and under the hood is a Class 5.

Collected from Wikipedia.com

Though originating in the United States, the standard Federal Standard 209E was the first and most commonly referred to. This standard was replaced in 1999 by an international standard, however Federal Standard 209E remains today the most widely referenced standard in the world.

US FED STD 209E Cleanroom Standards

Class	0.1 µm	0.2 µm	0.3 µm	0.5 µm	1 µm	5 µm
1	35	7	3	1
10	350	75	30	10	1
100	3500	750	300	100	10	1
1,000				1,000	100	10
10,000				10,000	1,000	100
100,000				100,000	10,000	1,000

The Replacement standard is ISO 14644-1 and is meant to completely replace Federal Standard 209E. Each of these standards represents the maximum allowable number of particles in a unit of air. The typical unit is either cubic feet or cubic meters. The particle counts are always listed as cumulative.

ISO 14644-1 Cleanroom Standards

particle/m³
Class	0.1 µm	0.2 µm	0.3 µm	0.5 µm	1.0 µm	5.0 µm
ISO 1	10	2
ISO 2	100	24	10	4
ISO 3	1,000	237	102	35	8
ISO 4	10,000	2,370	1,020	352	83
ISO 5	100,000	23,700	10,200	3,520	832	29
ISO 6	1,000,000	237,000	102,000	35,200	8,320	293
ISO 7				352,000	83,200	2,930
ISO 8				3,520,000	832,000	29,300
ISO 9				35,200,000	8,320,000	293,000

Cleanroom Class Comparison

ISO 14644-1	FED STD 209E
ISO 3	1
ISO 4	10
ISO 5	100
ISO 6	1,000
ISO 7	10,000
ISO 8	100,000

Mark Optics Incorporated
1424 East St. Gertrude Place, Santa Ana, California, 92705
Phone: 714-545-6684 Fax: 714-545-3105

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