The FluidScan® 1000 series handheld Infrared oil analyzer provides direct quantitative measurement of a lubricant’s condition and plays an important role in Machine Condition Monitoring (MCM) for proactive and predictive maintenance in Reliability Management programs. It determines when oil needs to be serviced due to degradation of the oil chemistry or contamination by other fluids such as water or the wrong oil. It is compliant with ASTM D7889 “Standard Test Method for Field Determination of In-Service Fluid Properties Using IR Spectroscopy”.

It also fulfils the National Emission Standards for Hazardous Air Pollutants for Reciprocating Internal Combustion Engines (NESHAP RICE) requirements for extending oil change intervals in engines and back-up generators when used in conjunction with the Spectro Q3050 Portable Viscometer.

Operating Principle


The FluidScan® is a self-contained handheld InfraRed analyzer that delivers instant fluid condition assessment to the user. It eliminates sample preparation and time-consuming cleanup using a patented flip top sampling cell for easy and rapid on-site analysis. At the core of the FluidScan is a patented, mid-infrared spectrometer with no moving parts. The spectrometer collects the infrared light transmitted through the fluid in the flip top cell into a waveguide. The waveguide then carries the light to a prism-like diffraction grating that reflects the light into a high-performance array detector which registers the infrared spectrum of the fluid. It provides more than adequate spectral range, resolution and signal-to-noise ratio for the rapid analysis of in-service lubricants.

Within one minute of sample introduction an InfraRed absorption spectrum of the fluid under test is produced by the Fluidscan optical system, and different calibration algorithms are then applied to the spectrum from a stored library of about 700 different fluids to produce parameters such as Oxidation, Total Base Number, Total Acid Number, depending on the fluid type. Spectro Scientific patented total water algorithm based on InfraRed Spectroscopy enables free water and dissolved water measurement to 300ppm for turbine oils. Parameter specific alarm limits stored in the Fluidscan device are applied to resulting parameters so user can immediately view pass/fail information on the device display.

Measured Parameters
One of the advantages of the FluidScan over laboratory FTIR is its ability to report absolute quantitative results for critical properties such as TAN and water contaminations for industrial lubricants or TBN, water, glycol, and soot for engine oils. Below table specifies different parameters provided by FluidScan depending on the oil type.
Oil Type Properties Measured by FluidScan
Transmission  Water (PPM), Oxidation (Abs/0.1mm)
Hydraulic – Fire resistant (Phosphate Ester) Water (PPM), TAN (mg KOH/g)
Hydraulic – Aerospace (Synthetic Hydraulic Fluid) Water (PPM), Oxidation (Abs/0.1 mm), Alien Fluid mineral based (MIL-H-2304) (%), and Alien Fluid engine oil (ML-H-23699) (%)
Heat Transfer (Quenching Oil)  Water (PPM), Oxidation (Abs/0.1 mm)
Industrial (Steam and CCGT Turbine, Hydraulic, compressor, Chiller, Gear, etc.) Water (PPM), Oxidation (Abs/0.1 mm), TAN (mg KOH/g)
Turbine Aerospace (Synthetic Gas Turbine Oil) Water (PPM), TAN (mg KOH/g), Antioxidant (% depletion)
Engines (Engine oil for different engine types, including Gasoline, Diesel, Heavy Duty Diesel, HFO, Natural Gas, ctc) Water (PPM), Oxidation (Abs/0.1 mm), TBN (mg KOH/g), Sulfation (Abs/0.1 mm), Nitration (Abs/cm), Soot (%), Glycol (%), Anti Wear (%)
Ethanol in Gasoline Ethanol (%)
FAME in Diesel  FAME (%)
Biodiesel Feedstock Water (PPM), FFA %
Biodiesel  Water (PPM), TAN (mg KOH/g), Total Glycerin (%)

ASTM Compliance

  • ASTM D7889 Compliant – “Standard Test Method for Field Determination of In-service Fluid Properties

Easy to use

  • Needs just one drop of oil and one minute to test
  • No solvents required to clean
  • Color coded alarm levels

Fluid Manager desktop application provides:

  • Report capability
  • Device synchronization
  • Data backup
  • Asset Manager database

Multivariate Calibration

The FluidScan classifies fluids into groups called families based on their chemical makeup, usage and spectral signature. Family-specific algorithms are assigned that accurately quantify these amounts. The TAN, TBN and water are calibrated directly to wet chemistry titration readings. Soot is calibrated to soot percentages determined by thermo-gravimetric analysis. Glycol and incorrect fluid percentages are calibrated to samples prepared with known concentrations of glycol and incompatible fluids. The table summarizes key FluidScan properties and the ASTM protocols to which they correlate as a result of this calibration process.

Item Fluidscan Method
AW Additives ASTM D7412/E2412 (FTIR)
Oxidation ASTM D7414/E2412 (FTIR)
Sulfation ASTM D7415/E2412 (FTIR)
Nitration ASTM D7624 (FTIR)
Glycol ASTM E1655 and E2412
Soot ASTM D5967 (Thermo-Gravimetric Analysis)
TBN ASTM D4739 (Titration)
TAN ASTM D664 (Titration)
Water ASTM D6304 (Karl Fischer Titration)

Applications library

The 700 oils in Fluidscan database are classified by oil type and then grouped together for different applications. The table below specifies the part number for library license, intended application, and types of oils included in the library. Library license is specified at the time of FluidScan purchase and can be upgraded later.

FL364 Automotive Engine, Engine-Natural Gas, Hydraulic, Transmission
FL365 Aviation Compressor, Engine, Hydraulic, Hydraulic – Fire resistant, Hydraulic-Aero, Turbin-Aero
FL366 Fuel QC Biodiesel, Biodiesel Feedstock, Ethanol in Gasoline, FAME in Diesel
FL367 Industrial Chiller, Compressor, Engine, Engine-Heavy Duty, Engine-Natural Gas, Gear-Pressure, Gear-Splash, Heat Transfer, Hydraulic, Hydraulic-Fire Resistant, Slideway, Transmission, Turbine-Aero, Turbine-CCGT, Turbine-Steam
FL368 Lab Trend ASTM Petroleum Engine, ASTM Polyol Ester (Turbine)
FL369 Marine Chiller, Compressor, Engine, Engine-Heavy Duty, Engine-HFO, Gear-Pressure, Gear-Splash, Hydraulic, Transmission, Turbine-CCGT, Turbine-Steam
FL370 Military Chiller, Compressor, Engine, Engine-Heavy Duty, Engine-HFO, Gear-Pressure, Gear-Splash, Hydraulic-Fire Resistant, Hydraulic-Aero, Turbine-Aero
FL371 Railroad Railroad Compressor, Engine, Engine-Natural Gas, Hydraulic, Transmission
FL360 All Libraries All Categories of oils included

Product Models



FluidScan 1000

FluidScan 1100
Color Yellow Blue
Default library None. One free library from FL364 to FL371 at time of purchase Industrial
Upgradable to full library Yes Yes
Total water license Optional Optional
Route base analysis No Yes
OilView Interface No Yes
Intended application Fleet, marine, military, aerospace, fuel QC Industrial manufacturing plants, power plants