Historical
DS/EN 12941:1998
Respiratory protective devices - Powered filtering devices incorporating a helmet or a hood - Requirements, testing, marking
This European Standard specifies minimum requirements for powered filtering devices incorporating a helmet or a hood with gas, particle or combined filter(s). It does not cover devices designed for use in circumstances where there is or might be an oxygen deficency (oxygen less than 17% by volume). Also it does not cover respiratory protective devices designed for escape purposes.
Danish Standards [ds]