Oliemonitoring

Oliemonitoring is the systematic observation and analysis of lubricating oil used in machinery to assess lubricant quality, contamination, and wear. The aim is to detect degradation and abnormal wear early, supporting condition-based maintenance and reducing the risk of unexpected failures.

It combines offline laboratory oil analysis with online monitoring. Sampling plans, traceable handling, and periodic testing establish a baseline and track trends. Online sensors provide continuous data on key oil properties, enabling real-time alarms and quicker maintenance decisions.

Typical measurements include viscosity, water content, acidity (total acid number), alkalinity (total base number), oxidation indicators, particle content, wear metals, and oil cleanliness. Techniques include viscometry, infrared spectroscopy for oxidation and additive depletion, ICP-OES/MS for metal content, and particle counting. Online systems may monitor viscosity, temperature, moisture, and dielectric properties.

Oliemonitoring is used in automotive engines, industrial gearboxes, hydraulic systems, turbines, and marine propulsion. Benefits include longer lubricant life, optimized drain intervals, reduced downtime, and better fleet or plant asset management. The data supports predictive maintenance, improving reliability and total cost of ownership.

Challenges include sampling representativeness, sensor drift and fouling, data integration, and the need for standardized interpretation across equipment types. Effective oliemonitoring requires qualified analysis and alignment with maintenance workflows.