Fluid Analysis Calculator

Interpret ISO 4406 contamination codes and assess hydraulic fluid cleanliness levels

Input Parameters

Results

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ISO 4406 Code
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Cleanliness Rating
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4µm/6µm Ratio
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Meets Target

Reference

ISO 4406 code = log₂(particle count) + 1 (rounded up) Three codes: ≥4µm / ≥6µm / ≥14µm Servo valves: 16/14/11 Proportional: 18/16/13 General: 20/18/15