This Rotronic HygroPalm23-AW-A Water Activity Meter set is a handheld, portable instrument and is an essential tool for measuring water activity, relative humidity, and temperature which are critical parameters for determining the shelf life and microbial stability of products in the food, pharmaceutical and cosmetic industries. This unit features two probe inputs, a real time clock, data logging capabilities (up to 10,000 records), and the “Aw Quick” function for fast measurement results. Included accessories: carrying case, 4 calibration solutions, manual and extra sample containers. This equipment is lightly used, great condition.