This system is used to test electromagnetic reflectivity and transmissivity of 4′ x 8′ loaded core or foam materials. It is used at the same facility as the core loading system. The system has a 100 dB dynamic range and can be used in a diagnostic or QC mode. An integral database stores transmission data after each dip & cure cycle and adds reflection data after the final dip. User selectable acceptance windows for each step allow the part to be validated through the entire build-up process.