# Resonant Sensors Incorporated

> Resonant Sensors Incorporated (RSI) is an Arlington, Texas biotechnology company that builds label-free optical biosensor systems based on its patented guided-mode resonance (GMR) technology. Its ResoSens Ultra-Mab Pro benchtop plate reader and disposable Bionetic microarray plates let researchers watch molecular binding interactions in real time, in a standard 96-well format, using tiny sample volumes and no fluorescent labels. RSI targets antibody discovery, epitope binning, hybridoma screening, kinetics and cell-based assays for immunotherapy, diagnostics and life-science research, and also offers analytical contract testing services.

- **Founded:** 2004
- **Headquarters:** Arlington, Texas, United States
- **Founders:** Debra Wawro Weidanz (Co-Founder, CEO & Chief Scientist), Robert Magnusson (Co-Founder (guided-mode resonance technology))
- **Team size:** 2-10 employees (approx. 4)
- **Products:** ResoSens Ultra-Mab Pro, ResoVu Software, Bionetic Microarray Plates, Analytical / Contract Testing Services
- **Notable:** Commercialized guided-mode resonance (GMR) sensing into a working benchtop antibody-analysis instrument, Holds patents on guided-mode resonance sensors using angular, spectral, modal and polarization diversity, Won multiple NIH and NSF SBIR/STTR research grants

## Products & services

- **ResoSens Ultra-Mab Pro** — Benchtop, semi-automated plate reader based on proprietary guided-mode resonance (GMR) optical sensing. Delivers label-free, real-time detection of binding interactions in a disposable 96-well format with integrated buffer dispensing and incubation; run times in minutes.
- **ResoVu Software** — Analysis software that accompanies the ResoSens reader, capturing spectral shifts and turning them into binding kinetics, affinity and specificity data.
- **Bionetic Microarray Plates** — Proprietary disposable label-free sensor plates in 96- and 384-well formats, available untreated (bare TiO2 surface) or pre-activated with standard attachment chemistries for biotinylated reagents.
- **Analytical / Contract Testing Services** — Fee-for-service label-free assay work: antibody characterization, epitope binning, hybridoma screening, affinity and specificity testing, and assay development support.

## Achievements

- Commercialized guided-mode resonance (GMR) sensing into a working benchtop antibody-analysis instrument
- Holds patents on guided-mode resonance sensors using angular, spectral, modal and polarization diversity
- Won multiple NIH and NSF SBIR/STTR research grants
- Demonstrated picomolar-level detection sensitivity in published GMR biosensor research
- Developed proprietary disposable Bionetic plates in both 96- and 384-well formats

## Latest updates

- **2023-10** — Relaunched company website and product branding around the ResoSens Ultra-Mab Pro and Bionetic plate technology.
- **2021-11** — Closed a Series B financing round of approximately $2.63M.

## Links

- Website: https://resonantsensors.com
- LinkedIn: http://www.linkedin.com/company/resonant-sensors-incorporated
- Twitter/X: https://twitter.com/ResonantSensors
- Facebook: https://facebook.com/pages/Resonant-Sensors-Incorporated/202698999765399

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Last updated: 2026-07-18