Fluid analysis provides a snapshot of what is happening inside your equipment. It tells you the condition of the fuel or lubricant and identifies component wear and contamination. The Donaldson Patch Test Kit allows you to conduct on-site particulate analysis in as little as ten minutes. It quickly and reliably assigns a three-digit cleanliness code per ISO 4406-1999 to a given fluid sample.


  • Use this kit to determine which systems need improved filtration
  • When improvements are made, use it to monitor the cleanliness standard of the system


  • Easy to use
  • Provides reliable results
  • Results in as little as 10 minutes
  • Great alternative to expensive, portable electronic devices


  • Kit includes enough supplies for 200 fluid samples
  • All apparatus is securely packaged and well-protected with laser-etched foam in a sturdy carrying case
  • Provides results quickly and reliably