This page contains information about the ≥18μm Particle Count analyte.
Count of Particles ≥18μm
Method: ISO 4406
Units: None
This is a measure (or count) of the number of particles detected in 1ml of sample which are 18 micrometers or greater in size. Results do not identify the type of particles counted, but are indicative of the overall "cleanliness" of the fluid.
Figure 1, shown below helps to visualize the relative sizes of the particles analysed by the laboratory.