NLK Apparatus


General information

The test of fine lime on the ability to react when extinguishing takes place by measuring the temperature increase which occurs during its reaction with water as a function of the reaction time (Quick lime reactivity test “NLK”) Basis of apparatus and measuring method is the standard EN 459-2.

Fort the reaction process you will add 150 +/- 0.5 g quick lime into the Dewar flask in which are already 600 +/- 1g of distilled water at about 20 ° C. Since the content of the Dewar flask must be thoroughly mixed throughout the duration of the experiment, this apparatus is provided with a stirrer (speed 350 +/- 1 / min).

During the reaction, the released heat energy warms up the water. The temperature increase is detected by a high-quality temperature sensor and can be transferred optionally to a special software for evaluation.

Basis of apparatus and measuring system is EN 459-2.

Software solution for capturing and supporting the analysis process

The company pdv-Software GmbH, Goslar (Germany) has developed pdv-nlk3 for capturing, storing, and the mathematical analysis of the measured values​​.

Key Features

  • Measurement data acquisition with two temperature sensors/transducers
  • Analysis according to DIN EN 459-2
  • Parameters T0, tmax, Tmax, T‘max, tu80, Tu80, T60, T10, T40, R-value, maximum of turnover rate
  • Records values up to four temperature sensors/transducers
  • Representation of the characteristic values in the wet slaking curve diagram
  • Saving (as an image file) and printing of measurement progress
  • Management of measurement data and samples
  • Central master data
  • Integrated device driver for measurement instrument Testo 735, up to 4 channels simultaneously; other drivers on request
  • Calibration of the sensors on two or more points
  • Examination of heat loss of the Dewar vessels
  • Import and Export of existing raw and end data via CSV interface
  • Integration with laboratory information systems (LIS/LIMS) possible