μm

micron (micro-meter).


Related Terms

MICROMETER (μm)

A unit of length. One millionth of a meter. Also known as micron. 1 Micrometer = 39 millionths of an inch (.000039 inch). Contaminant size is usually described in microns. Relatively speaking, a grain of salt is about 60 microns and the eye can see particles to about 40 microns. Many hydraulic filters are required to be efficient in capturing a substantial percentage of contaminant particles as small as 5 microns.

SUPERCLEAN FLUID

10 particles >10 micron per milliliter

ANGSTROM

A unit of length, used especially in expressing the length of light waves, equal to one tenthousandth of a micron or one hundred millionth of a centimeter.

MICRON

One millionth of a meter, or 0.000039 in. or 1/25400 in The diameter of dust particles is often expressed in microns.

CLEAN FLUID

100 particles >10 micron per milliliter

ULTRACLEAN FLUID

1 particle >10 micron per milliliter

SILT

Contaminant particles 5 μm and less in size.

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