Particle Count

Definition

Particle Count is the measurement of all particles that have accumulated within a system, including those metallic and non-metallic, fibers, dirt, water, bacteria and any other kind of debris. It is most useful in determining fluid and system cleanliness in such filtered systems as hydraulics, turbines, compressors, auto/power shift transmissions, recirculation systems and filtered gear systems with a fluid viscosity of less than ISO 320.

Standard Test Method Used

mod. ISO 11500

Reporting Measurement

ISO Code at 4, 6 & 14 micron, distribution at > 4, 6, 10, 14, 21, 38, 70 & 100μm

Amount of Sample Needed

80 mL

Test Limitation

Particle Count is not a suitable test for opaque or dark fluids. Counts will be adversely affected on samples contaminated by water. Particle Count is a quantitative - not qualitative - test. It will not identify the type of particles detected - only their size. Fluids over ISO 220 are diluted to run properly.

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