LFA 427

• Principle of the LFA Method
• Definition Thermal Diffusivity
• Definition Thermal Conductivity

The LFA 427 runs under Proteus^® Software on Windows®. The Proteus^® Software includes everything you need to carry out a measurement and evaluate the resulting data. Through the combination of easy-to-understand menus and automated routines, a tool has been created that is extremely user-friendly and, at the same time, allows sophisticated analysis. The Proteus^® Software is licensed with the instrument and can of course be installed on other computer systems.

LFA features:

• Accurate pulse length correction, pulse mapping
• Heat-loss corrections, all literature models are integrated
• Non-linear regression for Cowan fit
• Improved Cape-Lehmann model through consideration of multi-dimensional heat loss and non-linear regression
• Radiation correction for semi-transparent samples
• 2- or 3-layers systems: analysis by means of non-linear regression and consideration of heat loss
• Determination of Contact ResistanceAccording to the second law of thermodynamics, heat transfer between two systems always moves in the direction from higher to lower temperatures. The amount of thermal energy transferred by heat conduction, e.g., through a wall of a building, is influenced by the thermal resistances of the concrete wall and the insulation layer.contact resistance in multi-layer systems
• Model wizard for selecting the optimum evaluation model
• Determination of specific heat by means of a comparative method and standard samples
• Integrated databank

You can use the following software with this product

• 

  Proteus^®

• The LFA 427 is equipped with a cooling thermostat to guarantee the greatest temperature and long-term stability.
• Various vacuum pumps, including turbomolecular pumps, enable measurements at reduced pressure, in high vacuum or in pure, oxygen-free atmospheres.
• Flow meter for purge gas
• Sample holders and caps made of aluminum, SiC and graphite for standard sample dimensions
• A number of sample holders made of alumina, platinum, aluminum and sapphire are available in various sizes for liquid samples, metal melts, slags and fibers.
• Reference samples for Thermal DiffusivityThermal diffusivity (a with the unit mm2/s) is a material-specific property for characterizing unsteady heat conduction. This value describes how quickly a material reacts to a change in temperature.thermal diffusivity
• Reference samples for specific heat
• Sample preparation machines