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Northeast Laboratories, Inc.

Services/Testing Areas
Alcoholic Beverages
Cleaners, Detergents and
Related Products

Compressed Air
Food and Dairy Products
Hazardous Waste
Indoor Air Quality
Medical Device
Mold Studies
Particle Sizing
Plastic and Paper Goods
Potable Water


Berlin Office
129 Mill Street, Suite 11
Berlin, CT 06037
CT 860.828.9787 or 800.826.0105
outside CT 800.654.1230
fax 860.829.1050
Contact the Berlin Office

Particle Sizing

Industrial Oils:

Northeast Laboratories' Modified ASTMF 312 Method

  • Microscopic Particle Count: It is well documented that varnish is a thin insoluble contaminant comprised of oil degradation by-products and sometimes depleted additive molecules.
  • Northeast Laboratories' modified ASTM F 312 method for Microscopic Particle Counting, Particle Sizing and Particle Identification, extends the analytical range of varnish detection down to less than 1 micron.
  • Because these "soft contaminants" are less than 1 micron in size, microscopic particle counting is used as a tool to trend particles in the microscopic size ranges and alert of potential varnish anomalies.
  • With this technique we physically count particles with a high intensity microscope and monitor the submicron ranges for increases in levels.
  • This means that we are able to detect varnish forming particles sooner.