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NASA Standard NHB5340.2 |
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| Bioclean room class | Max. No. of particles greater than 0.5µ | Max. No. of particles greater than 5µ |
Max. No. of microbe particles |
Average microbe fall per week | ||
| pcs/ft3 (pcs/l) | pcs/ft3 (pcs/l) | pcs/ft3 (pcs/l) | pcs/ft3 (pcs/l) | |||
| 100 | 100 (35) | 01 (0.0035) | 1,200 (12,900) | |||
| 10000 | 10,000 (350) | 65 (2.3 | 0.5 (0.0176) | 6,000 (64,600) | ||
| 100000 | 100,000 (3,500) | 700 (25) | 2.5 (0.0884) | 30,000 (323,000) | ||