JFA-70Xi  FREEZE POINT, viscosity & density LAB ANALYZER

Phase Technology does it again – another “first” for the petroleum industry.

Phase Technology’s new JFA-70Xi jet fuel analyzer is the world’s first and only instrument that performs three crucial tests in one unit—freeze point, viscosity and density. And, it does it all in less than 15 minutes!

The JFA is also available as a 5-in-1 analyzer, adding cloud and pour point for diesel fuel. That makes it the most versatile analyzer in your lab!

The JFA-70Xi features a new, side loaded automatic sample injection port. There’s no longer a need to manually pipette. The analyzer always draws the precise amount of sample as required by the ASTM method.

The JFA is completely self-cleaning, without the need of solvents. Save time and hassle of cleaning, and avoid any risk of damage to the sample cup.

ASTM D1655 jet fuel specification now includes Phase Technology’s ASTM D7945, as used in the JFA-70Xi jet fuel analyzer. Def-Stan 91-091 Issue 10 also includes D7945.


  • Super fast speed – Three different tests in less than 15 minutes
  • Advanced viscosity capability – The only automatic method capable of testing jet fuel viscosity @ -40°C in addition to -20°C ; temperature @12 cSt also calculated
  • Approved for jet fuel certification – Fully compliant with ASTM D1655, the specification used for release of jet fuel.
  • Automatic sample input – No pipette required. New vial injection system loads sample automatically.
  • Self cleaning – no solvent required – No pipette required. New vial injection system loads sample automatically.
  • No external chiller – Quiet, cool, self-contained thermoelectric cooler; no hazardous liquid bath medium (methanol toxicity)
  • No breakable glassware – Internal capillary system eliminates need for fragile glass viscosity tubes
  • Superior precision – Best measured repeatability and reproducibility of any automatic or manual method

  • One-touch preset Favorites – Frequently-used test settings can be stored in the analyzer for quick access. Favorites can be created, organized, sorted or deleted as you desire. With the single push of a button, lab operators can efficiently perform tests in significantly less time
  • Optimized for quality control – Automatic QC runs with instantaneous control charts. Retest sample option increases confidence in test result.
  • Unsurpassed detection of contamination in jet fuels
  • Easy-to-use interface; intuitive and easy to understand
  • Full-color, touch-sensitive, 15” high resolution screen
  • USB and Ethernet connectivity
  • Programmable user access levels streamlines workflow and prevents accidental changes
  • Connect any HP (or PCL-5e compatible) printer via USB
  • Import and store any user documents (.doc, .pdf, .ppt and .pps) for customized operating procedures (SOP) or training
  • Configurable desiccant replacement count
  • Customizable reporting – test history, plot data and self-diagnostics can be displayed on-screen, printed, or transferred to computer for statistical analysis, presentations, email sharing, archival storage
  • Test uses small sample volume
  • Completely self-contained system: no need for external coolant Quiet, energy efficient and environmentally friendly (no toxic coolant vapors)


  • Introducing the Phase Technology JFA-70Xi Jet Fuel Analyzer: The world’s first and only instrument that performs three crucial tests in one unit, freeze point, viscosity and density. And, it does it all in less than 15 minutes!

  • Phase Technology 70Xi Analyzer Operation: See how easy it is to use Phase analyzers. One touch is all it takes!

  • How to Replace Desiccant: Learn how easy it is to replace desiccant on all Phase Technology 70Xi series analyzers.


Freeze point, viscosity and density are three critical measurements for jet fuel. Freeze point affects fuel pumpability at low temperatures during flight. Viscosity has an effect on pumpability over the operating temperature range. Viscosity is important because it influences the droplet size and spray pattern of fuel that injected into the jet engines. It also affects pressure in the fuel system lines and the fuel pump. Density is a required measurement that is used in weight loading calculations for aircraft.

Phase Technology 70Xi series analyzers give you complete flexibility – choose the test options you need for a customized solution. Available JFA-70Xi configurations include: 

  • JFA-70Xi Freeze point, viscosity, density for jet fuels
  • JFA-70Xi-PC Freeze point, viscosity, density for jet fuels; cloud and pour point for diesel fuels
  • JFA-70Xi-AS Freeze point, viscosity, density for jet fuels; with 48-position autosampler
  • JFA-70Xi-PC-AS Freeze point, viscosity, density for jet fuels; cloud and pour point for diesel fuels; with 48-position autosampler



Freeze Point ASTM D5972 (IP 435)
ASTM D2386 (IP 16/ISO 3013) equivalent or better
Kinematic Viscosity ASTM D7945 @ -20 ºC, @ -40 ºC and @ 12cSt
ASTM D445 (IP 71/ISO 3104) equivalent or better
Density ASTM D4052 (IP 365/ISO 12185) @ 15 ºC correlation
0.5 ºC
0.8 ºC
Kinematic Viscosity Repeatability
0.011cSt @ -20 ºC
0.0018 X1.4 cSt @ -40 ºC
0.14ºC @ 12cSt
0.021cSt @ -20 ºC
0.0021 X1.4 cSt @ -40 ºC
0.17ºC @ 12cSt
Density Repeatability
0.0001 g/mL
0.0005 g/mL
BIAS   0 (relative to ASTM manual methods)
  -80 ºC to 70 ºC
SYSTEM CLEANING   Automatic flush cycle; no solvent required
TEST DURATION Freeze Point only 8 to 10 minutes
Viscosity & Density <10 minutes
Freeze, Viscosity, Density <15 minutes
SAMPLE SIZE   0.15 mL required for test  
    25 mL required for system cleaning
DETECTION METHOD   Diffusive Light Scattering (DLS) technology
(over 25 patents)
COOLING SYSTEM   Integrated Peltier device cooling system
DISPLAY   Full-color, touch-sensitive, 15” high resolution LCD touch screen
OUTPUTS   (3) USB A ports for flash drive, label printer,
barcode scanner keyboard, mouse
(1) USB B port
(3) RS-232 serial ports for optional accessories, LTB diagnostic software, external computer
(1) dedicated Service port
(1) 10/100Base-T Ethernet (RJ45) port for
networking: LIMS, local area network (LAN)
TEMPERATURE MEASUREMENT   ºC or ºF (user selectable)
ALERTS   Audible tone alerts (user selectable)
INTERNAL MEMORY   Storage up to 5000 test runs (minimum)
Extremes not recommended
(L X W X H)
Unit 21.5 x 13.25 x 17.5 inches
54.6 x 33.7 x 44.5 cm
Boxed 29 x 23 x 19 inches
74 x 58 x 48 cm
WEIGHT Unit 53 lbs
24 kg
Boxed 62 lbs
28 kg
47 – 63 Hz
350 watts
External cooler bath NONE




Click here to download a JFA-70Xi brochure

Click here to download a JFA-70Xi-PC brochure for jet fuel and diesel


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Learn More:

JFA-70Xi Lab Analyzers [pdf]

Phase Technology JFA-70Xi-PC-Analyzer for Jet Fuel and Diesel [pdf]