R99
Translingual
Etymology
English R99
Noun
R99
- A filtration type that efficiently filters out 99% of airborne particulates of 0.3 microns (“μm”) (and all larger particles) and is somewhat resistant to oil.
- A filter implementing the R99 standard.
Coordinate terms
- P1, P2, P3
- FFP1, FFP2, FFP3
Related terms
- R95, P95, N95
- P99, N99
- R100, P100, N100
English
Etymology
From Initialism of Resistant to oil particles with 99% filtration efficiency in NIOSH air filtration ratings.
Noun
R99 (countable and uncountable, plural R99s)
- R99; Ellipsis of NIOSH R99.
- (uncountable) R99 standard
- (countable) R99 filter
Coordinate terms
- R100, P100, N100 (99.97% filtration)
Related terms
- N99 (non-oil-resistant filter standard)
- P99 (oil-proof filter standard)