FTIR Lube Oil & Grease Analyzer

The MINISCAN IR LOG is a highly versatile and extremely fast FTIR analyzer, designed for on-site condition monitoring of oils and greases. It is also capable of measuring low or high levels of water in oil accurately and quickly without using hazardous reagents.

Easy and Fast Condition Monitoring

The MINISCAN IR LOG FTIR analyzer requires only one drop of sample to accurately measure numerous performance indicators of oils and greases. Depletion of anti-wear oxidation compounds and additives, as well as the level of sulfates, nitration, soot or water is measured and pass/fail information is displayed within minutes. Preconfigured methods are easily selectable for measuring different types of lubricating oils. A measurement can be done by untrained personnel.  The instrument is also able to determine low or high levels of water in oil, offering a perfect alternative to Karl Fischer titration. The analyzer reduces measurement time to minutes, no hazardous chemicals are required and results are analytically as accurate or better than KF titration.

Unique Dial-Path Setup

The MINISCAN IR LOG is featuring a unique dial-path setup, which allows easy switching between sample cells. Three different path lengths are pre-installed: a 50 micron sample cell for quick screening, a 100 micron cell for ASTM and EN compliant measurements and a 1000 micron cell which allows the detection of very low levels of additives or contaminants in oil. This setup guarantees that the instrument conforms to and exceeds precision requirements specified in various ASTM, EN or IP methods.

Key Features

  • FTIR analyzer designed for field use
  • Internal battery (up to 4h operation)
  • Portable and robust housing
  • Dedicated sample interface
  • Maintenance free transmission setup
  • Unique dial-path setup (3 cells)
  • Easy to clean, no rinsing required
  • Less than 1 mL sample per measurement
  • No limit for viscosity or particle contamination
  • Easy to set up, easy to use
  • Results within minutes
  • Requires no reference measurement w/ chemicals


  • ASTM E2412 and ASTM D7418
  • Phosphate (ASTM D7412)
  • Oxidation (ASTM D7414)
  • Sulfate (ASTM D7415)
  • Nitration (ASTM D7624)
  • Antioxidants (ASTM D2668)
  • TBN (ASTM D2896)
  • TAN (ASTM D664)

Components & Contaminants

Antiwear: ZDDP, Phosphates, Silicates.
Biproducts: Phosphates, Sulfates.
Aminic Antioxidants: Napthalamine,Diphenyl Amine.
Phenolic Antioxidants: Hindered Phenol .
Extreme Pressure: Phenates, Sulfurized Isobutylene, Aromatics, Sulfoxides.
Antifoam: Silicones, Siloxanes.
Dispersant: Polyisobutylene Succinimide.
Oxidation: Ketone, Esters, Carboxylic Acids.
Ester Breakdown, Phosphate Ester, Polyolester, WD 40 Ester (Dialkylated Sulfosuccinate)
Sulfate, Sulfonate: Organic and inorganic sulfoxides, corrosive and acidic.
Nitration: Organic nitrates.
Water, stabilized water.
C.ontamination with Gasoline, Diesel, FAME.
Other contaminants.


Interferometer geometry High-throughput Michelson Interferometer, fixed and moving flat mirrors
Standard beamsplitter Zinc selenide
Range / Spectral resolution 4000-650 cm-1 /4 cm-1
Detector 1.3 mm Diameter, theromelectrically cooled dTGS
Laser Low-powered solid state
Cell windows Selectable path length: 50, 100 or 1000 µm
Power Supply 100-240 V AC, 3A, 50/60 Hz
Battery Operation: 6600 mAh, 12.6V/3.5 A DC
Environmental conditions Operating temperature 0 to 50°C (32 to 122°F),
Humidity up 95% r.h., non condensing
Dimensions/Weight WxHxD: 216 x 292 x 191 mm (8 x 11.5 x 7.5 in) / 6.8 kg (15 lbs)