ISO 4548-12 Filtration efficiency using particle counting and contaminant retention capacity


ISO 4548 specifies a multi-pass filtration test with continuous contaminant injection and using the online particle counting method for evaluating the performance of full-flow lubricating oil filters for internal combustion engines.

The test procedure determines the efficiency, contaminant capacity of a filter, its particulate removal characteristics and differential pressure.

  • You choose the micron size particles you would like to test the efficiency for

  • You choose the flowrate, fluid type, and contaminant

  • Send us your filters, or flat sheet media

  • Send us your filter housing if available

  • We can help you with any questions you have to ensure the testing meets your or your client’s needs

  • This test can be customized for any special requirement you may have