Monitor lubricant and fuel condition before problems develop Acid formation in lubricants and Marine Gas Oil (MGO) can result from oxidation, contamination, and ageing. Increased acidity may accelerate corrosion, promote deposit formation, and affect equipment reliability. The Unitor™ Total Acid Number (TAN) Kit provides a fast and practical method for measuring acidity directly onboard. Suitable for marine lubricants and light distillate fuels such as MGO, it enables engineers to identify fluid degradation early and make informed maintenance decisions without relying on laboratory analysis. Delivering results within minutes, this portable and easy to use kit supports proactive maintenance, enhanced equipment protection, and improved operational efficiency with its simple on board test procedure, supporting your vessel’s condition-based maintenance decisions.
Identify degradation trends early
Extend lubricant service life
Reduce maintenance costs
Why monitor the total acid number?
Acid formation can result from oxidation, contamination and ageing. Rising acidity may accelerate corrosion, promote deposit formation and affect equipment reliability. Regular onboard TAN checks help crews detect early warning signs and support preventive maintenance planning.
Applications
Coverage includes both standard lubricant grades and EAL-compliant alternatives • Trunk Piston Engine Oils • Hydraulic Oils • Gear Oils
• Turbine Oils • Compressor Oils • Marine Gas Oil (MGO)
• Auxiliary Engine Systems • Marine Fuel Management Programs
Technical specification Total Acid Number Kit Product number
673160
Kit Contents Method of testing
ASTM D974 colour indicator
Measuring range
0 – 6 AN
Test time
2 mins
Total no. of tests
25
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