TERM-OIL-CONDITION-MONITORING
Oil Condition Monitoring
Fluid Cleanliness
Also: oil analysis · lubricant condition monitoring · fluid analysis · predictive oil maintenance
Abbrev: OCM · OA
Canonical Definition
The systematic measurement of lubricating or hydraulic oil properties to assess both the condition of the oil itself and the mechanical condition of the lubricated components. Monitoring parameters include: particle count and ISO cleanliness code (contamination level), viscosity, acid number/TAN (oxidation state), base number/TBN (additive depletion), wear metal concentrations by spectrometric oil analysis (iron, copper, lead, chromium, aluminium), water content by Karl Fischer titration, and silicon (indicator of air filter bypass or seal failure). Results guide predictive maintenance decisions on oil change intervals and component inspection.
Engineering Context
Oil condition monitoring converts filter service from scheduled replacement to condition-based replacement, extending oil drain intervals by 30–100% in many applications while reducing unexpected failures. Lab oil analysis performed every 250–500 operating hours provides the most complete picture; in-line sensors for particle count and water content enable real-time monitoring without sampling.
Related Technologies
Protection Systems
Knowledge Center Articles
KC-00 Governance Metadata
| Permanent ID | TERM-OIL-CONDITION-MONITORING |
| Category | Fluid Cleanliness |
| Status | Published |
| Version | 1.0 |
| Last Reviewed | 2026-07-05 |