The instrument is used to determine the temperature below which solid hydrocarbon crystals are formed in case of aviation fuels. This type of instrument provides an automated sample testing with high degree accuracy and repeatability and meets standard specifications and international test methods.

Salient Features

• The apparatus features a direct cooling system, which reduces the need for solvent cooling baths.
• The instrument meets standard international specifications.
• The equipment is easy to use and has a single start or stop push button.
• There are two stages of cooling system in the instrument. One-stage cooling system offers temperatures as low as -35° C and a two-stage cooling system down to -70° C.
• The instrument is easy to install.

Working Principle

• There is a sample tube, in which the sample is cooled with continuous stirring until crystals appear.
• The instrument is equipped with a dynamic measurement system, which 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 back of a silvered-bottom test jar to an optical sensor.
• There is an advanced software package for analyzing the response of the light pulse.
• There is a light scattering system that monitors the initial appearance of crystallization.
• Then the sample is heated up and the temperature at which the hydrocarbon crystals disappear is recorded as the freezing point.
• The equipment is suitable for measuring all types of clear and transparent fuels irrespective of the sample color.

Applications

There are various applications of freezing point apparatus. Some of it's common applications are in:

• Petroleum Industry
• Fuel Testing
• Mineral Oil Industry
• Aerospace
• Chemical Industry