A measure of the pore size in the filter media. Expressed as either ‘Nominal’ or ‘Absolute’. Nominal Rating relates to the percentage of particles at a given size that a filter can capture ie. 10 microns at 90% means it will remove 90% of particles 10 microns in size. Absolute refers to the removal of all particles at a given micron size and larger ie. 20 micron absolute means 100% of particles 20 microns or greater will be captured.

No, but all water filtration systems that are designed to remove sediments and/or parasitic cysts (such as giardia and cryptosporidium) should have a micron rating. Generally speaking, the smaller the micron rating the better. A filter rated at 5 microns is pretty good, a 1- micron "abosolute" rated filter can effectively remove parasitic cysts such as giardia and cryptosporidium, and reverse osmosis systems are rated at approximately 0.

Air filters are not measured by micron size. As an industry standard, air filters are tested in accordance with the ISO 5011 test protocol to measure capacity (the physical amount of dust a filter can hold before cleaning is necessary) and efficiency (the filter’s ability to trap and hold dust). See technical service bulletin 89-5R from the Filter Manufacturer's Council. The dust selected for the test contains a specified distribution of different particle sizes according to ISO standards.

The micron rating of a filter represents the size of particle that the filter can remove from the fluid passing through it. The micron rating should be associated with an efficiency or beta value to indicate how efficient the filter is at removing that size of particle. Any given filter will remove various sizes of particles. The difference between filters is how efficient they are at removing certain sizes of particles.

A micron rating is a value assigned to a filter, indicating that filters ability to remove a certain size of particle. To accurately determine the filter's ability in removing a certain particle size, Beta Ratios from multi-pass testing should be used.

The ISO cleanliness code publishes a recommended cleanliness guideline for typical hydraulic system components; however, always check component manufacturer recommended ratings.

A micrometer (mi?CROM?e?ter) like this can measure distances to accuracies specified in micrometers (MI?cro?me?ters). Here, the accuracy of 0.002 mm is equal to 2 ?m. A micrometer is, of course, one millionth of a meter or a thousandth of a millimeter. The micron, symbol ?, was originally a special name for this distance, but the name and symbol were officially eliminated in 1968, so it's no longer correct to use microns.

With respect to the micron rating, we do not use or publish a micron rating for the Black Berkey® elements for the following reasons. There is much confusion with respect to nominal and absolute micron ratings. An absolute micron rating is one that states the maximum pore size expected within an element. The nominal micron rating is the average pore size within the element. This means that if 90% of the pores are .

Air filters are not rated by micron size on an absolute basis. (See technical service bulletin 89-5R from the Filter Manufacturer's Council) The proper rating system for air filters is a testing procedure developed to measure the efficiency of the filtration media at varying micron sizes. We routinely subject a sample of our air filters to this testing procedure conducted by independent laboratories.

A micron (one-millionth of a meter) is a unit used for microscopic measurements. A human hair is approximately 75-microns.

Question 3: Can I filter red blood cell components through a leukocyte reduction filter for platelets...

A micrometer, also called a micron, is a millionth of a meter, or a thousandth of a millimeter. As a reference, the diameter of a human hair is about 100 micrometers. Wavelengths of infrared radiation are typically expressed in micrometers.

Micron Filtration retains nearly 100% of dust mites, grass pollen and ragweed plus particles 15 times smaller than the diameter of a human hair. Vacuum bags using Micron Filtration can also trap a large portion of lung irritants. Recommended for allergy sufferers.