Consider that water activity is partially responsible for minimizing non-enzymatic browning reactions and spontaneous autocatalytic lipid oxidization reactions; prolonging the activity of enzymes and vitamins; and optimizing the physical properties of products such as moisture migration, texture, flavor, odor and shelf life. Not bad for a little relative humidity measurement. Every retail food establishment needs to know what will happen to their products as they sit on the shelf, even under ideal conditions of temperature and humidity. Shelf stability means the product won’t get moldy, but it also affects the foods texture, moisture migration and caking and clumping [18]. Stability and food security depends on water activity and pH in the food environment. The water activity is higher with the products are perishable. Bat, even at low pH values and low aw, certain yeast and mould species that can tolerate high solute concentrations might pose a risk to the stability of Intermediate Moisture Foods (IMF). Currently, consumers prefer foods (vegetables and fruits) processed at least. Therefore, safety considerations are addressed seriously by food microbiology [5, 13, 15].