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Schaller RH2 water activity is meter Portable laboratory instrument for determination of water activity (aw value) of food with datalog function. Suitable for measuring materials like butter, fruit mix, spices, granulate, mushrooms, xylit, flour, biscuits or sausage as well as all other food types requiring a check of the water activity value. Furthermore, the humimeter RH2 is suited for measuring special material, e.g. plastic granulate or for climatic and environmental applications.