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LaserNet 200 Series is a precise and comprehensive particle analyzer for lubricants and fuels


The LaserNet 200 series features LaserNet Fines®, the world’s best oil particle analyzing technology utilizing a high speed CCD camera to capture particles flowing through a flow cell. It counts and sizes particles in oil and fuel, automatically classifies particle shapes, and analyzes ferrous particles by size and distribution, and calculates total parts per million concentration by weight.

Operating principles

LaserNet Fines® was developed by Lockheed Martin and the Naval Research Laboratory to identify the type, rate of production and severity of mechanical faults by measuring the size distribution, rate of progression and shape of wear debris in lubricating oil. It has been successfully deployed aboard naval vessels in an oil analysis-based predictive maintenance program, and used by oil analysis labs worldwide as the best oil particle analyzer on the market.

The center piece of LaserNet Fines® technology is the combination of flow cell (100 micron path length), a high power infrared laser source and a high speed (100 frames per second) CCD camera (640X480 resolution). Oil, along with particles, flows through the flow cell, which is illuminated by the laser and the shadows of the particles are captured by the high speed camera. Image analysis produces particle size and distribution according to various standard formats.

Particle shapes are analyzed by the software with artificial intelligence (Neural Network). The Neural Network was trained by tribology experts using Ferrographic analysis of data from real life in-service oil samples. Particles larger than 20 micron maximum diameter are automatically classified into cutting wear (or abrasive wear), sliding wear (or adhesive wear), fatigue wear, fibers, or non-metallic particles (sand and dirt). Water droplets and air bubbles can be classified as well. The bubble counts are removed from final particle count and distribution. The laser is powerful enough to see through dark engine oil samples with up to 2% soot, making it the only particle analyzer on the market that can test engine oil without dilution.

Two pairs of precision balanced coils (large and small) are included in the LaserNet 230 model. The small coils count ferrous particles larger than 25 micron as they flow through the coil, producing a size distribution. The large coils measure the total ferrous content in part per million (by weight).

Key Features

ASTM D7596 - Standard Test Method for Automatic Particle Counting and Particle Shape Classification of Oils Using a Direct Imaging Integrated Tester

Particle count features

  • Particle Count for all particles from 4 μm to 100 μm
  • Highest saturation limit, up to 10,000,000 particles/ml with a coincidence error <2%
  • Viscosity range ISO15 to ISO320, undiluted
  • Images through dark fluids containing up to 2% soot with automatic laser gain control
  • Error corrections for water and air bubbles
  • Particle counts and codes per ISO 4406, NAS 1638, NAVAIR 01-1A-17, SAE AS 4059, GOST, STM D6786, HAL, and User defined bins.
  • Export data into LIMS software

Automatic shape classification features

  • Automatically classify particles larger than 20 micron (maximum diameter)
  • 7 classes – cutting wear, sliding wear, fatigue wear, non-metallic, water droplets, air bubbles, fiber. User can reclassify particles manually
  • Numerical count of each classes can be used for trending analysis

Ferrous particle analysis features

  • < 10 ppm for total ferrous concentration
  • Detects ferrous particles over 25 microns, equivalent circular diameter
  • 20 second additional test time for Ferrous measurement

Auto-Sampling Process for high throughput sample processing

LaserNet 200 series is equipped with an optional auto-sampling processer (ASP). It holds 24 samples in a carousel sample tray and automatically stirs sample bottles to homogenize particle distribution before each measurement. It automatically cleans and rinses the stir paddle and all the tubing after each measurement. It typically takes 2 to 3 hours to complete 24 samples. Actual run time varies by oil viscosity and cleanliness.

Analytical Tests and Features by model

There are three models in the LaserNet 200 series. Below table details the difference among the three models.