These are the common ratings you will come across in most hardware stores...ok lets go
N SERIES
N95 N99 N100
The N series are not oil resistant they can only protect against solid and liquid that do not contain any oil particles.
R SERIES
Resistant to oil, solid, liquid and aerosol particulates that contain oil. 8 hour service life before it needs to be replaced.
P SERIES
Contains the exact same features as the R SERIES but has a work-time of 40 hours before replacement is needed.
Remember higher the N number smaller the particles it can filter out with at least a 99.997% efficiently.
P-100 filter will block 99.9% of particles .3 microns or larger.
So what the heck is a Micron?
Micron is the measure of length used to describe a tiny particle size. Micron is actually a commonly used shorthand for micrometer. A micrometre is defined as one-millionth of a meter, a little more than one twenty-five thousandth of an inch.
Here are the most common micron size particles
Comments