Two calculators for determining equilibrium moisture values corresponding to selected Aw values using the Guggenheim–Anderson–de Boer (GAB) model and  the Brunauer-Emmett-Tellet (BET) model have been added.

To use the models, the constants for the product concerned must be inputted. Selected Aw values are then added. The calculator will then calculate the equilibrium moisture content for each value and plot it against Aw, to give a sorption or desorption isotherm.

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