Our VNAs are used for a variety of materials measurement applications. From NASA estimating fuel levels in the fuel tank with 1-Port reflectometers to Compact and Cobalt analyzers incorporated into portable, table-top free-space measurement systems that take materials RF measurement out of the lab and into the field or manufacturing environment. The NEW Epsilometer measures dielectric properties of materials to 6 GHz. The use of vector network analyzers is an efficient and reliable approach to measure and optimize the dielectric properties of tested materials.