ffp3 category masks refer to masks that meet European (CEEN149:2001) standards. The European protective mask standards are divided into three levels: FFP1, FFP2, and FFP3.
What is different from the American standard is that its detection flow rate is 95L/min, and DOP oil is used to generate dust.
DOP method uses DOP oil to generate dust. The DOP oil particle diameter is an aggregated average particle diameter of 0.33 μm and a counting average diameter of 0.20 μm.
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