AFIDA – Advanced Fuel Ignition Delay Analyzer – SA6000-0

Indicated Cetane Number Analysis

AFIDA is a revolutionary development providing you with a fully automated way of determining Indicated Cetane Number (ICN) of diesel and diesel related fuels. The AFIDA can analyze multiple samples in sequence and selects the samples using the 36-place auto sampler. Only a small sample volume of 40 ml is required per test with a short analysis time of approximately 25 minutes.

The analyzer uses a Constant Volume Combustion Chamber (CVCC) and incorporates a unique and patented high pressure injection system that generates fine fuel droplets similar to modern common rail injectors in most diesel engines.

An ultra robust temperature controlled piezo electric injector provides rapid switching and highly repeatable fuel metering, offering you improved performance and consistency when compared with solenoid controlled injectors and pintle type nozzles.

Methods:  ASTM D613, ASTM D975, ASTM D6751, ASTM D7467, ASTM D8183, IP 41, IP 617, BS EN 17155, BS EN ISO 5165 & BS 2000-41 & ISO 5165


  • Excellent correlation to ASTM D613, IP 41 and BS EN ISO 5165, BS 2000-41, ISO 5165
  • Wide sample types – middle distillates, blend components, biodiesel, FAME, XTL, HVO, heating oil and Jet A1
  • Suitable for use with Cetane improvers
  • Calibrated with industry approved PRFs over the range 35 to 85 ICN
  • Precise and reproducible software controlled determination of ICN
  • Results saved to PC or for download
  • Stable calibration – fixed test conditions eliminates routine temperature tuning
  • Low running costs, single gas supply for combustion air

Direct correlation to ASTM D613 (ISO 5165) engine tests:
The traditional Cetane Engine methods establish an ignition delay period for the test fuel which is referenced to a primary reference fuel scale.

Existing Constant Volume Combustion Chamber (CVCC) technology provides a Derived Cetane Number (DCN) result based on a historical averaged correlation equation applied to the ignition delay of the fuel sample.

The new generation AFIDA technology is a significant step forward as it uses the same Primary Reference Fuels as specified in the Cetane Engine method to provide a calibrated cetane number measurement.

The AFIDA has multiple integral safety monitoring functions to ensure the system is running safely and accurately.

The AFIDA also has safety functions in place to prevent the system from overheating in the event of a power failure.

Industry stakeholders recognise the advantages of the AFIDA with CEN, ASTM and the Energy Institute forming new working groups to develop test methodology; IP 617 is already published as an approved test method.

Inter-laboratory studies showed outstanding precision and excellent correlation when compared with samples with known Cetane Numbers. The coefficient of determination (R²) is 0.98. An investigation into carryover with 2-EHN Cetane Improver showed no effect.

COMPRESSED AIR 20.9 ± 0.5 % O2
SAMPLE VOLUME approx. 40 ml for analysis and cleaning
WARM UP TIME approx. 45 min
ANALYSIS TIME approx. 25 min per sample
SIZE (DXHXW) 1300 mm x 800 mm x 600 mm (excluding platform)
WEIGHT 160 kg 100 kg (excluding platform)