Oil Performance Monitor

Lubricon Oil Performance Monitor: Control Unit ...
Oil Performance Monitor: Control Unit ...

Monitoring the deterioration of lubricants gains more and more relevance with regard to design of gearing and internal combustion engines as well as in operation of those aggregates. All this in terms of ecological and economical aspects and of parameters as reliability, failure probability and the length of oil change periods.

Novel fuels as biodiesel or ethanol cause greater effect to lubricants used in combustion engines than fuels based on mineral oil. For instance, the fuel entry to the lubricant is significantly higher when using biodiesel, compared to mineral oil diesel.

Important criteria for lubricant deterioration are particle entry, thermal oxidation, chemical conversion and mechanical destruction of high-molecular additives.


... and Sensor

Essential quantifiable symptoms of oil deterioration are viscosity alteration, an increase of insoluble contamination (including metallic content) and an alteration of neutralisation ability (Total Base Number "TBN" and Total Acid Number "TAN").

The oil performance monitor simultaneously and contiuously measures the values which repesent these symptoms: the viscosity, the specific electrical conductivity and the relative dielectric coefficient. The measurement is non-reactive and non-destructive.



  • wear-free, no moving parts
  • small, compact sensor for measuring the most important oil data
  • sensor assembly e.g. in place of oil drain plug
  • measurement independent from oil flow
  • self-cleaning effect
  • inference immunity even at tough process operation
  • measurements fully automated by micro processors
  • very high reliability
  • very short set-up and measuring time
  • easy handling and cleansing
  • compact dimension
  • several normed interface for process integration

Technical Data:

  • viscosity: 1 to 500 mPas
  • dielectric:
    1 to 100 (+/- 0,05)
  • specific electrical resistance:
    1 to 10 MΩm
  • temperature:
    -30°C to +150°C (+/- 0,1K)
  • reproducibility: < 1%
  • mains power:
    8 - 36 VDC
  • electr. power consumption:
    max. 2 Watt
  • sensor power consumption:
    < 100mW



  • measuring time: approx. 15 s
  • pressure range: 16 bar max
  • easy recalibration
  • digital interface: RS 232
  • analog interface:
    2x  4..20mA/0..10V
  • weight control unit:
    1.8 kg
  • sensor threads:
    M14x1.5 (passenger cars),
    M22x1.5 (trucks)