Industrial Standards What is sterile class 11? March 7, 2026 by Myaya | Leave a Comment Sterile Class 11 refers to a specific classification within the ISO 14644-1 standard for cleanrooms. It denotes a cleanroom environment with a maximum of 352,000 particles per cubic meter of air that are 0.5 micrometers or larger. This level of cleanliness is less stringent than higher classes but still requires controlled conditions for certain applications. […] Read more ยป