The Ziath Tube Dowser is designed to test a variety of standard polypropylene storage tube styles and determines the water content of the DMSO contained within the tube. The measurement technology is completely non-invasive (i.e., decapping is not required), and is accurate to within 1% of hydration level of DMSO. USB-powered, the Tube Dowser is small, integratable and represents a major breakthrough in affordability.