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The reactivity of fine lime during slaking is tested by measuring the temperature increase that occurs during its reaction with water as a function of the reaction time. This process is called NLK (wet erasure curve). The equipment and measuring method are based on EN 459-2. For the reaction process, 150 +/- 0.5 g of undissolved lime is added to the Dewar vessel, which contains 600 +/- 1 g of distilled water at approx. 20° C. As the contents of the Dewar flask must be completely mixed throughout the entire duration of the experiment, this apparatus is equipped with an agitator (speed 350 +/- 1/min). During the reaction, the heat energy released heats the water. The temperature increase is recorded by a high-quality temperature sensor and can optionally be transferred to software for evaluation. Function overview Standard-compliant recording and evaluation in accordance with DIN EN 459-2 using the characteristic values T0, tmax, Tmax, T’max, tu80, Tu80, t60 Display of further characteristic values such as ΔT5, T10, t40, reaction enthalpy (heat tint), R-value, conversion rate maximum, etc. Evaluation of the final reaction rate (FR value) incl. graphical representation Measured value recording with 2, 4 or 8 temperature sensors (depending on version) Free configuration of the determination values Comprehensive management of measurements and samples Print preview with numerous export formats Test equipment management for the measuring devices and Dewar vessels Integrated device driver for Testo 735 measuring instrument (via USB); other drivers on request Calibration of the sensors via two points Testing the heat loss (water value) of the Dewar vessels File-based CSV interfaces for transferring (importing) existing raw data and for forwarding (exporting) intermediate and final results Generation of measurement logs/reports at the touch of a button Export of intermediate and final results via defined interfaces or CSV files Prepared for the US standard ASTM C 110