Benchtop Online Micro-ESR from Active Spectrum

Active Spectrum’s on-line Micro-ESR sensor is the world’s first industrial process monitoring instrument that offers embedded, non-destructive measurement of free radicals and transition metals.

Active Spectrum's on-line Micro-ESR sensor uses the principle of Electron Spin Resonance (ESR/EPR) spectroscopy to determine the concentration and composition of free radicals in any solid or fluid sample. Magnetic resonance spectroscopy is not affected by sample opacity or density. This makes Micro-ESR ideal for analyzing emulsions, opaque liquids and non-metallic solids that cannot be analyzed in other ways.

Key Features

The key features of the Micro-ESR Oil Analyzer are:

  • Asphaltene and Vanadium in Crude Oil
  • Thermal Breakdown of Lubricants
  • Corrosion: iron oxides
  • Soot and carbon in exhaust gases and oil


The applications of the Micro-ESR Oil Analyzer are:

  • Chemical additive concentration
  • Transition metals: Mn, V, Fe, Cr, Co, Cu and others
  • Combustion, oxidation, polymerization and coking processes
  • Catalyst coking

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