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	Laser Flash Apparatus LFA 427 LFA 427  | See also: LFA 457 | LFA 447

Temperature range:  -70°C to 2000°C Laser with variable power and pulse width Vertical system Vacuum tight, various atmospheres Special sample holders available for powder, liquid (molten metals),   slag, fiber and sandwich samples Software with 15 separate data evaluation models including finite   pulse and heat loss correction See also: LFA 457 Microflash LFA 447 Nanoflash Xenon Flash System     What is the heating or cooling load for a house or the cooling requirement for an automobile or aircraft engine? In order to answer these questions, the thermophysical properties of the materials must be known over the temperature range of interest. One of the most important of these properties is the thermal diffusivity, which can be measured with the NETZSCH LFA 427 over the temperature range of -40 to 2000°C. The thermal diffusivity values can be converted to thermal conductivity using the specific heat and bulk density. A high degree of reproducibility and accuracy, along with fast measurement times, simple sample geometries and small sample sizes, are some of the advantages of thermal diffusivity measurements over the so-called direct thermal conductivity measurement methods. The fact that materials with thermal diffusivity values ranging from 0.001 to 10 cm2/s can be accurately measured is an additional advantage. The completely enclosed system, with its space-saving design, meets the highest safety req uirements (class 1) and can be operated with no special safety precautions. The advanced software allows the instrument to be operated in the manual or fully-automatic mode. Additional holders are available for the measurement of powder, liquid, slag, fiber and sandwich samples.