Solid contaminants

OELCHECK test instrument: Millipore filter system, scale, desiccator
Sample quantity:10 ml
Unit: mg/kg (weight)
Test result: solid contaminants
Analysis for:

Gear, motor and hydraulic oils, insulating oils, circulation oils

Brief description:

The oil sample is diluted with solvent and drawn through a filter with a pore width of 0.8 µm. The difference in filter weight resulting from the "solid contaminants" is converted into mg/kg by weight.


The quantity of "solid contaminants" provides information on the overall pollution of the oil for investigation. The particles on the filter paper can be investigated further using a microscope.

Sometimes conclusions can subsequently be drawn on the origin of these residues.

Underlying test standard: OELCHECK test method OPM 080