MIL-1246 Particle Count


Technique for detecting and categorizing particles in a used lube oil resulting from wear or contamination. Standard particle count is the MIL-1246 (Military Standards).  By the MIL STD test a laser passes through  a specified opening, as the fluid pass through, perpendicular to the laser source, particles and debris block out the laser source and by measuring the time of blockage determine the size of particles in the following size range:
 

 

1 - 10 um
 

10 - 25 um

 

25 - 50 um

 

50 - 100 um

 

100 - 150 um

  150 - 250 um
  250 - 500 um
  500 - 750 um
  > 750 um


Other non-direct particle count methods include: Flow Rate Decay, Electro Conductivity, Optical Density Equivalent, Magnetic Mass Equitant and others.  In the test, algorithms are calculated to approximate the particle quantities in each given size range.

 

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