This European Standard specifies minimum requirements for filtering half masks as respiratory protective devices to protect against particles except for escape purposes.Laboratory and practical performance tests are included for the assessment of compliance with the requirements.
DS/EN 149+A1:2009 history
2009DS/EN 149+A1:2009 Respiratory protective devices - Filtering half masks to protect against particles - Requirements, testing, marking
1992DS/EN 149:1992 Respiratory protective devices. Filtering half masks to protect against particles. Requirements, testing, marking