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The most important prerequisite for calibration is very high temperature stability. Thermostats with bath liquids are the most precise devices for this application as they allow especially good temperature stability and homogeneity. Liquid bulb thermostats are superior to incubators and metal block thermostats, since liquids transfer heat between 40 and 60 times better than air.
A special technical feature of all LAUDA calibration thermostats is the overflow principle. The bath consists of two chambers. The separation into pre-chamber and thermostating chamber ensures good temperature homogeneity. The pump conveys the bath liquid from the pre-chamber to the useable area that has a level-control overflow. This method ensures that the level of the bath liquid remains constant, irrespective of the temperature. Furthermore, the adjustment of the usable area can change the height of the liquid level so that the objects to be thermostated can be immersed in accordance with relevant standards and can be easily read out.
See how the calibration thermostats work below.
