Resonant Sensors

Resonant Sensors Incorporated (RSI) is a biotechnology company specializing in high-throughput, label-free optical biosensor systems for biochemical analysis and medical diagnostics. The company's core technology is based on proprietary Guided-Mode Resonance (GMR), which enables real-time, high-precision measurements of biomolecular interactions without the need for fluorescent or radioactive labels. RSI's flagship product, the ResoSens Ultra-Mab Pro, is a benchtop plate reader designed to accelerate antibody discovery and characterization by providing kinetic binding data in a standard 96-well format. The company also offers disposable Bionetic sensor plates and specialized reagents, such as peptide/HLA monomers and tetramers, to support immunotherapy research. Headquartered in Arlington, Texas, RSI serves the pharmaceutical and biotechnology industries by streamlining drug discovery, industrial screening, and preclinical research.