British Standards Document
BS EN 143
Respiratory protective devices. Particle filters. Requirements, testing, marking

https://doi.org/10.3403/30359206U

BS EN 143 is maintained by PH/4. The current release of this standard is:

BS EN 143:2021 Respiratory protective devices. Particle filters. Requirements, testing, marking

https://doi.org/10.3403/30359206 (published 02/03/2021)

This standard is available from the following sources:

Other historical versions of this standard document also exist:

BS EN 143:2000 [current until 02/03/2021]
BS EN 143:1991 [current until 15/06/2000]