DFA-70Xi Cloud Point, Pour Point, viscosity & density LAB ANALYZER

Versatility and convenience combined!

Phase Technology’s new DFA-70Xi analyzer is the world’s first and only instrument that performs four important diesel fuel tests in one single unit—cloud point, pour point, viscosity and density. And, it does it all in less than 25 minutes!

The DFA-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 DFA 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.


  • Super fast speed – Four different tests in less than 25 minutes
  • 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 Phase Technology 70Xi Series Analyzers: Learn about the full line of Phase cloud, pour and freeze point analyzers. Which one is best for you?

  • 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.


Diesel and biodiesel fuel’s cold-weather operability and fuel handling characteristics are measured by testing cloud point and pour point. Viscosity is an important parameter to ensure there is proper lubrication, with no damage in the engine’s fuel pump. Viscosity also influences the spray pattern when the fuel is injected into the cylinder. Density affects the heating value (or energy content) of the fuel.

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

  • DFA-70Xi Cloud point, pour point, viscosity, density for diesel fuels
  • DFA-70Xi-FP Cloud point, pour point, viscosity, density for diesel fuels; freeze point, density for jet fuels
  • DFA-70Xi-AS Cloud and pour point, viscosity, density for diesel fuels; with 48-position autosampler
  • DFA-70Xi-FP-AS Cloud and pour point, viscosity, density for diesel fuels; freeze point, density for jet fuels; with 48-position autosampler



Cloud Point ASTM D5773 (IP 446)
ASTM D2500 (IP 219 / ISO 3015) equivalent or better
Pour Point ASTM D5949
ASTM D97 (IP 15 / ISO 3016) equivalent or better
Kinematic Viscosity ASTM D7945 @ 40 ºC
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
Pour Point Repeatability
1.6 ºC
3.2 ºC
Kinematic Viscosity Repeatability
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 Cloud & Density compbined 8 to 10 minutes
Viscosity & Density combined <10 minutes
Cloud, Pour, Viscosity, Density combined <25 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 DFA-70Xi brochure

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DFA-70Xi Lab Analyzers [pdf]