ERASPEC

Spectral Fuel Analysis in Seconds

ERASPEC is eralytics’ industry-proven multi-fuel analyzer with several thousand installations worldwide. It offers measurements of fuel component concentrations and of complex parameters like RON or cetane number for gasoline, diesel fuel, jet fuel and even specialized fuels like ethanol fuels. A single push of a button delivers all results in only 1 minute.

Standards

  • ASTM D5845
  • ASTM D6277
  • ASTM D7777
  • ASTM D7806
  • EN 238
  • EN 14078
  • ISO 15212
  • IP 559

Correlation to

360° View

Gasoline spectrum measured with ERASPEC

FTIR Fuel Analysis

In FTIR fuel analysis a spectrum of the analyzed fuel is recorded in the mid-infrared region using an Fourier transform spectrometer. Depending on the chosen method a single measurement is able to detect over 40 parameters within a few seconds. For gasoline measurements e.g. RON, MON, AKI, distillation properties, esters and aromatics concentrations are determined. When analyzing diesel aromatics, cetane improvers, biodiesel and many more can be quantified. Analyzing biodiesel ERASPEC distinguishes between FAME / FAEE and vegetable oil. It measures FAME in full compliance with ASTM D7806 and EN 14078. Typical parameters for jet fuel include FAME, aromatics, freezing and flash point, smoke point and distillation parameter, as well as viscosity.

Screenshot of the ERASPEC result screens for gasoline and Diesel analysis

Concentrations vs. Parameters

ERASPEC can directly derive fuel component concentrations from the measured IR spectrum. That includes aromatics such as benzene (ASTM D6277), oxygenates such as MTBE or ethanol (ASTM D5845) and octane boosters such as MMT for the measurements of gasoline. Knowing the exact fuel composition, however, also allows to calculate more complex fuel parameters. ERASPEC uses chemometrical models, based on fuel libraries, to calculate parameters such as RON, MON or distillation and evaporation fractions from the spectrum for gasoline. It covers cetane number and index and many more for diesel fuel.

ERASPEC libraries view

Expandable Database

While the ERASPEC fuel analyzer comes already with factory installed databases that, depending on the chosen modules and requirements, it is easily expandable by the user. These databases provided by eralytics are tailor-made to the typical needs within a given country or region. Adding customer samples to the databases is as easy as running a measurement and entering the corresponding reference values afterwards. The added data is used right for the next measurement as the chemometrical models are calculated on the fly. Additionally it is possible to add new user defined parameters the same way to tailor future measurements.

4 gas pump nozzles at a gas station

Unknown or Contaminated Samples

The “Automatic Fuel Recognition” (AFR) Module allows an easy measurement of unknown samples with the ERASPEC fuel analyzer. It recognizes if gasoline, diesel or jet fuel is measured and automatically starts the correct analysis according to the registered fuel type.
Most common contaminations of gasoline can be measured with the “Gasoline Contamination Module”. Typical substances that can be quantified are DMM, N-Methyl-Aniline, Diolefines, Aniline, DMC, various Butyl-Acetates and more.

This makes the ERASPEC fuel analyzer to a reliable tool to fight fuel adulteration fraud directly at the gas stations.

  • Retroreflectors used in ERASPEC
  • IMG_0402

Patented Design

The heart of the ERASPEC fuel analyzer is a patented corner-cube retro-reflector FTIR spectrometer. For highest precision it uses a laser / temperature control and a spectral resolution tailored to the task of fuel analysis. This reduces any noise to an absolute minimum, increasing the repeatability and lowering the possible limits of detection. Additionally ERASPEC is equipped with an original eralytics’ innovation: the triple-cell design. ERASPEC automatically selects between a 20 µm and a 100 µm path length measurement cell depending on the fuel analyzed. This allows ERASPEC to always deliver the best measurement result possible. A third cell is used to run background measurements if needed.

 

For standard measurements of gasoline the 20 um measurement cell is suited best. Using its 100 um cell, however, ERASPEC can easily lower its limit of detection if it comes to low concentration measurements of contaminants in gasoline.
Dr. Roland Aschauer, R&D

  • An ERASPEC FTIR fuel analyzer showing the measurement menu where measurement parameters are entered prior to the measurement
  • An ERASPEC FTIR fuel analyzer visualizing the measurement on screen
  • An ERASPEC FTIR fuel analyzer showing the results table summarizing results such as RON, MON, ethanol content, ...

Measurement Procedure

To perform spectral analysis with the ERASPEC fuel analyzer can be done in 4 simple steps:

  • Enter sample ID and operator name
  • Select the measurement standard and the library to be used for calculating properties
  • Put your sample next to the fuel analyzer and insert the inlet tube
  • Press the RUN button

The measurement steps are visualized on the display, showing the deflection of the moving mirror of the interferometer. When the measurement is completed the results are displayed and can be printed or added to a library with a single click. When adding the results of the fuel analyzer to a library an editor for entering known properties will appear. This will improve the quality of future measurements using the ERASPEC fuel analyzer, as the library can be tailored to a specific application.

 

Parameters Gasoline Module

Properties1Range
Research Octane Number (RON)70 - 110
Motor Octane Number (MON)60 - 100
Anti Knock Index (AKI)65 - 105
RVP & DVPE35 - 100 kPa
Distillation fractionsIBP, T10, T50, T90, FBP
Evaporation fractionsE70, E100, E150, E180, E200, E300, E350, E370
Density (built-in U-tube cell)0 - 3 gcm-3
Driveability Index, VOC Emissions Calculator, Vapor Lock Index (VLI)
Sum ParametersRange
Aromatics10 - 60 Vol%
Olefins10 - 80 Vol%
Di-Olefins20 - 15 Vol%
Oxygenates20 - 80 Vol%
Oxygen20 - 12 wt%
Anilines20 - 25 Vol%
Esters20 - 30 Vol%
Saturates0 - 100 Vol%
Oxygenate Parameters2Range
MTBE0 - 20 Vol%
ETBE0 - 25 Vol%
TAME0 - 25 Vol%
TAEE0 - 20 Vol%
DIPE0 - 20 Vol%
Dimethoxymethane (DMM)0 - 20 Vol%
Methanol0 - 15 Vol%
Ethanol0 - 25 Vol%
Iso-Propanol0 - 20 Vol%
2-Butanol0 - 25 Vol%
tert-Butanol0 - 25 Vol%
Dimethylcarbonate (DMC)0 - 15 Vol%
Methylacetate0 - 15 Vol%
Ethylacetate0 - 15 Vol%
Isobutylacetate0 - 15 Vol%
Sec-Butylacetate0 - 15 Vol%
Aromatics2Range
Benzene0 -10 Vol%
Toluene0 - 20 Vol%
o-Xylene0 - 20 Vol%
m-Xylene0 - 20 Vol%
p-Xylene0 - 20 Vol%
Ethylbenzene0 - 20 Vol%
Propylbenzene0 - 20 Vol%
2-Ethyltoluene0 - 20 Vol%
3-Ethyltoluene0 - 20 Vol%
4-Ethyltoluene0 - 20 Vol%
Pseudocumene0 - 20 Vol%
Hemillitol0 - 20 Vol%
Mesitylene0 - 20 Vol%
Iso-Durene0 - 20 Vol%
Durene0 - 20 Vol%
Naphthalene0 - 10 Vol%
Octane Boosters2Range
MMT0 - 10000 mg/L
CMT0 - 10000 mg/L
Manganese (by MMT)0 - 2500 mg/L
DCPD (Dicyclopentadiene)0 - 15 Vol%
Anilines2Range
Aniline0 - 15 Vol%
N-Methylaniline0 - 15 Vol%
o-Methoxyaniline0 - 20 Vol%
o-Toluidine0 - 20 Vol%
m-Toluidine0 - 20 Vol%
p-Toluidine0 - 20 Vol%
N,N, Dimethylaniline0 - 20 Vol%
Easy addition of unlimited user-defined properties.
1 … The range and repeatability for all correlated properties depend on the used database.
2 … Lowest concentrations correspond to the limit of detection (LOD), all concentrations in Vol% and wt%

Parameters Diesel Module

Properties1Range
Cetane Number20 - 80
Cetane Index20 - 80
Distillation fractionsIBP, T10, T50, T65, T85, T90, T95, FBP
Evaporation fractionsE250, E350
CFPP-50 - +20 °C
Viscosity @ 40 °C0 - 10 mm2/s
Density (built-in U-tube cell)0 - 3 gcm-3
Easy addition of unlimited user-defined properties.
1 … The range and repeatability for all correlated properties depend on the used database.
2 … Lowest concentrations correspond to the limit of detection (LOD), all concentrations in Vol% and wt%.
ParametersRange
Total Aromatics10 - 60 Vol%
Polynuclear Aromatics (PNA)10 - 50 Vol%
Benzene20 - 5 Vol%
Cetane Improver (2-EHN, IPN)20 - 20 000 mg/L
Dimethoxymethane (Methylal)20 - 20 Vol%
FAME20 - 100 Vol%
FAEE20 - 65 Vol%
Vegetable Oil20 - 65 Vol%
Distinction between FAME (Biodiesel) and vegetable oil
Separate calibrations for different FAME / FAEE sources

Parameters Jet Fuel Module

Properties1Range
Freezing Point-25 - -75 °C
Flash Point25 - 65 °C
Smoke Point19 - 29 mm
Viscosity at 20°C1.2 - 2.1 mPas
Viscosity at -20°C2.4 - 4.5 mPas
Distillation fractionsIBP, T10, T50, T65, T85, T90, T95, FBP
Density (built-in U-tube cell)0 - 3 gcm-3
ParametersRange
Total Aromatics10 - 60 Vol%
FAME concentration20 - 6 Vol%
Polynuclear Aromatics (PNA)10 - 10 Vol%
Easy addition of unlimited user-defined properties.
1 … The range and repeatability for all correlated properties depend on the used database.
2 … Lowest concentrations correspond to the limit of detection (LOD), all concentrations in Vol% and wt%

Parameters Fuel Ethanol & Fuel Methanol Modules

Fuel Ethanol Module

Parameter2Range
Ethanol0 - 100 Vol%
Water0 - 2 Vol%
Methanol0 - 15 Vol%
Denaturant0 - 75 Vol%
Density (built-in U-tube cell)0 - 3 gcm-3

Fuel Methanol Module

Parameter2Range
Methanol0 - 100 Vol%
Density (built-in U-tube cell)0 - 3 gcm-3
Easy addition of unlimited user-defined properties.
2 … Lowest concentrations correspond to the limit of detection (LOD), all concentrations in Vol% and wt%

Feature Video

  • Characterization of over 40 fuel parameters within 60 seconds
  • Patented rugged FTIR and laser / temperature design for highest precision
  • Factory calibrated with a matrix of several hundred international fuels
  • Easy expandable libraries to tailor the reference matrix to special applications
  • Tailored path-lengths for various applications
  • Built-in oscillation U-tube density meter (ISO 15212)

Operation Video of the ERASPEC Fuel Analyzer

Watch this video to get an overview on the sample handling and measurement procedure of ERASPEC.

Technical Specifications

Available Test Methods
ASTM D5845, ASTM D6277, ASTM D7777, ASTM D7806, EN 238, EN 14078, ISO 15212, IP 559
Correlation to...
ASTM D86, ASTM D323, ASTM D613, ASTM D976, ASTM D2699, ASTM D2700, ASTM D4814, ASTM D5191, ASTM D6378, ISO 3405, ISO 5163, ISO 5164, ISO 5165, EN 13016
Spectrometer Type
Patented mid-FTIR spectrometer
Laser and temperature controlled design
Measurement Cell
20 µm and / or 100 µm path length cell, reference cell
Optimized dual or triple position cell design for gasoline, diesel, and jet fuel measurements
Calibration
Factory calibrated with a matrix of several hundred international fuels
Spectral Libraries
Easy addition, expansion and exchange of individual fuel libraries
On the fly recalculation of libraries without delaying any measurements
Available Analyzer Modules
- Gasoline module (ASTM D5845, ASTM D6277, and several correlation methods)
- MMT / CMT module (determination of MMT, CMT and Manganese)
- Contamination gasoline module
- Benzene (determination according to EN 238)
- Synthetic fuel module (for gasoline)
- Diesel module (with several preprogrammed correlation methods)
- 2EHN Cetan improver module
- low FAME module (for determination of FAME in diesel or jet fuel)
- EU FAME module (for determination of FAME according to EN 14078)
- Ethanol fuel module (ASTM D4806)
- Methanol fuel module
- Automatic fuel recognition module
- Jet fuel module (with several preprogrammed correlation methods)
Measurement Time
60 seconds, including sample introduction, measurement and calculations
Warm-up time: 30 seconds after booting the instrument