AquaLab is the quickest, most accurate, and most reliable instrument available for measuring water activity. Whether you are researching or working on the production line, AquaLab will suit your needs. It is easy to use and provides accurate and timely results. TDL 2 delivers laser light with a wavelength shorter than 1 nm that tunes to the water absorption zone in the upper space of the sample in a sealed chamber and measures the vapor density based on the attenuation of the laser light generated between the irradiated and received parts. The laser light reacts only to water molecules, regardless of the concentration of volatile components, completely eliminating the effects of volatile components and accurately measuring even extremely volatile samples such as alcohol and gasoline.