Water Activity Definition (AN-13418-00)

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  • AquaLab Dew Point Water Activity Meter 4TE,
  • AquaLab Series 4TEV,
  • AquaLab Series 3,
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Water activity is derived from fundamental principles of thermodynamics and physical chemistry. As a thermodynamic principle there are requirement in defining water activity that must be met. These requirements are; pure water (a_w = 1.0) is the standard state, the system is in equilibrium, and the temperature is defined.

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