KLA-5 Automatic Freezing Point System


Test Method
Determines the temperature below which solid hydrocarbon crystals form in aviation fuels. The sample is cooled with continuous stirring in a Dewar-type sample tube until crystals appear.

Features and Benefits
• Conforms to ASTM D2386 and related specifications

• Direct cooling system eliminates the need for solvent cooling baths

• One-stage cooling system provides temperatures as low as –35°C and a two-stage cooling system down to –70°C

• Single start/stop push button makes system simple to use

• Minimal installation required to set-up software and instrumentation


KLA-5 Automatic Freezing Point System
Freezing Point Detection–The freezing point detection system provides automated sample testing with the accuracy and repeatability in accordance with ASTM D2386 and related international test methods. The sample is cooled in the test chamber with constantly stirring. The sophisticated dynamic measurement system emits a light pulse every 0.5°C from a coaxial fiber optic cable positioned above the test sample. The light pulse is then reflected off the silvered-bottom test jar to an optical sensor. The advanced software package analyzes the response of the light pulse. The initial appearance of crystallization is monitored by light scattering. The sample is then warmed up, and the temperature at which the hydrocarbon crystals disappear is recorded as the freezing point. All clear and transparent fuels are readily measured by the detection system, regardless of sample color.

Advanced Software Package–The Windows®-based software package can control either a stand-alone system or provides multiple analyzer networking with a single network control station. All analytical parameters are graphed and displayed in real-time as well as recorded in Microsoft® Excel file format. The software monitors the operation and performance of all the analyzer components for proper data measurement, including the solenoid valves, cooling system, other moving parts, as well as the Pt-100 temperature probes and the pressure sensors. The calibration curves for each probes and sensors are displayed individually and saved to the hard disk with date and time of test.

Cooling System–For various user applications, the automated freezing point system is available with either one-stage cooling for temperatures as low as –35°C or two-stage cooling for temperatures as low as –70°C. The direct cooling system requires no solvent cooling bath and thus eliminates operator exposure to solvents used in standard cooling systems. The direct system is capable of rapid cooling, approaching –70°C bath temperatures in approximately 15 minutes, and utilizes less electricity than in standard cooling systems. The rapid cooling feature combined with a consistent cooling profile system provides repeatable results with high test reproducibility.

Multiple Configuration System–These automated sample cooling and physical property measurement systems can be configured with up to six test positions with one of five possible test heads at each position: cloud point, pour point, cloud & pour point, freezing point, and cold filter plugging point. Standard and customized multiple configuration systems are readily available. Please inquire with Koehler Customer Service about product specifications and ordering information.

PC Configuration– Operation of the software package requires the use of a PC, which should be ordered separately. Please inquire with Koehler Customer Service if assistance is needed in procuring a PC. The PC should have the following minimum requirements: Pentium III 800 MHz processor, 128 MB RAM, 2 GB hard drive, CD-ROM, Windows® 95/98 operating system, Microsoft® Excel, Windows® keyboard, monitor, mouse, graphic and video cards.

Conforms to the freezing point specifications of:
ASTM D2386; IP 16; ISO 3013

Included Accessories
Internal built-in direct refrigeration system
One- or two-stage cooling system
Interface Cells
Operating Software
Acquisition Board
Cord Cable without plug
Interface Cables
Test Jars

Electrical Requirements
115V 60Hz, Single Phase
220V 50Hz, Single Phase

Dimensions lxwxh,in.(cm)
(for the KLA-35 system)
28x23x28 (72x59x71)
Net Weight: 205 lbs (93kg)

Ordering Information



Product Description


Automatic Cloud Point System
(one-head unit)


Automatic Pour Point System
(one-head unit)


Automatic Cloud/Pour Point System
(one-head unit)


Automatic Cold Filter Plugging Point System
(one-head unit)


Automatic Freezing Point System
(one-head unit)

Please specify voltage and cooling requirements when ordering.


When ordering a multiple configuration system with up to six heads, please specify each measurement head with its associated catalog number using the lowest possible number combination. For example, a two-head cloud point and cloud/pour point system would be KLA-13 and not KLA-31, and a three-head cloud point, pour point, and freezing point system would be KLA-125 and not KLA-152, KLA-215, KLA-251, KLA-512, or KLA-521.