Water Activity Meter with Sensor is a single-point measurement unit with 0 to 0.980 aw of water activity (no condensing) measuring range and ± 0.015 aw measurement accuracy. The temperature range is from 0 to 50°C and offers ± 0.5°C measurement accuracy. Designed with high brightness LCD display and high precision sensor. To measure water activity of food items, and to study, the reaction of food stability and the possibility of microbial proliferation, and changes in food quality to measure the ability of microorganisms to endure dryness.