This is a Portable Water Activity Meter, with a Weight of Onlyġ00g, Lighter than a Mobile Phone & a Precision of 0.
A Water Activity of 0.80 means that the vapor pressure of the food is 80% that of pure water. And the water activity of dried or dehydrated foods ranges between 0.60 to 0.66. Perishable food products such as fresh vegetables, fruits, and meats have a water activity of 0.98 to 1.00.
Pure water has a water activity of 1.0, all is readily available for use. Our fitting CrH-measurement devices can be used for data logging. The values of water activity range from 0 to 1.0.
WATER ACTIVITY MEASUREMENT HOW TO
It is actually a ratio between the vapor pressure of the food itself when in a completely undisturbed balance with the surrounding air media & the vapor pressure of distilled water under identical conditions. How to measure the water activity What is water activity test Water activity must be measured by putting a sample in equilibrium with the gas phase surrounding it and then measuring the relative humidity of the air. Material climate measurements allow the analysis of the water activity of any given sample. This type of measurement is also a good indicator of when the product is ready for packaging. Intrinsic factors include water activity aw, pH value and redox potential Eh, and extrinsic factors cover temperature and humidity as well as atmospheric. Manufactures of food & pharmaceutical products measure water activity to show when the water activity of their product has declined to a point where bacteria can no longer grow. This can lead to clumping, changes in consistency & reduced shelf life. If there is “too much” water in a food product, there is a risk of microbial growth & water migration.
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