This project concerns the replacement, at the Research Unit Plasma Technology (RUPT), of an outdated FTIR spectrometer, which has supported over 100 peer-reviewed publications. RUPT is a recognized leader in non-thermal plasma interactions with gases, liquids, and solids, bridging fundamental and application-driven research. Despite the diversity of RUPT’s projects, all share a common requirement: the precise detection and analysis of chemical bonds, enabled by FTIR. The new system will support research on plasma-treated surfaces (e.g., biomaterials, industrial plastics, food packaging, historical artworks), gas-phase processes (e.g., volatile organic compound decomposition), and hydrogels (e.g., drug delivery). Many applications require in situ or time-sensitive measurements that external equipment cannot accommodate. A dedicated, in-house FTIR is thus essential to meet the precision, continuity, and high-throughput demands of RUPT’s cutting-edge research.