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Salinity changes of a watercourse with Cobra SMARTsense

Salinity changes of a watercourse with Cobra SMARTsense

Item no.: P1521469

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In this experiment it is shown how the salt leaching of a disused potash dump drastically increases the salt concentration of a stream, how the salt content downstream only gradually decreases again and how the increased salt concentration can still be measured downstream after it flows into a river.


  • experiment is part of a complete solution with numerous experiments in the field of ecology
  • Measurements possible indoors and outdoors, for mobile use
  • Especially understandable and didactically prepared description of the experiment (relevance to everyday life, etc.) including protocol questions.
  • Future-oriented teaching: Integration into digital science lessons with tablets or smartphones.
  • Increased motivation of students by using the intuitive measureAPP.
  • Increased media competence.


  1. measuring the conductivity of a flowing water at various points
  2. compare measured values and make statements about the reasons for the changes

Learning Objectives

  • Groundwater
  • salt washout
  • fertilisers
  • anthropogenic influences

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