The INNOVA Attobench System is based on the SPR technology that has been used successfully since decades; the INNOVA Attobench System being the result of more than a dozen years of research at the University of Exeter.
As for the INNOVA CovDImmune test, more information on science behind the test can be found in the publications below, the most recent are on pre-print servers. Other peer-reviewed articles are available upon request.
Fully Quantitative Measurements of Differential Antibody Binding to Spike Proteins from Wuhan, Alpha, Beta, Gamma, Delta and Omicron BA.1 variants of SARS-CoV-2: Antibody Immunity Endotypes. Philip H. James-Pemberton, Shivali Kohli, Jordan Twynham, Aaron C. Westlake, Alex Antill, Jade Hunt, Rouslan V. Olkhov, Andrew M. Shaw. Sep 2022 https://www.medrxiv.org/content/10.1101/2022.09.23.22280271v1.fulltext
Vaccine, Booster and Natural Antibody Binding to SARS-CoV-2 Omicron (BA.1) Spike Protein and Vaccine Efficacy. Philip H James-Pemberton, Mark W Helliwell, Rouslan V Olkhov, Shivali Kohli, Aaron C Westlake, Benjamin M Farrar, Ben J Sutton, Nicholas D Ager and Andrew M Shaw medRxiv. July 2022, 10.1101/2022.07.12.22277539 http://medrxiv.org/content/early/2022/07/15/2022.07.12.22277539
Fully Quantitative Measurements of the Antibody Levels for SARS-CoV-2 Infections and Vaccinations calibrated against the NISTmAb Standard IgG Antibody. Philip H James-Pemberton, Mark W Helliwell, Rouslan V Olkhov, Shivali Kohli, Aaron C Westlake, Benjamin M Farrar and Andrew Shaw medRxiv. July 2022, 10.1101/2022.07.12.22277533 http://medrxiv.org/content/early/2022/07/15/2022.07.12.22277533
Real-world evaluation of a novel technology for quantitative simultaneous antibody detection against multiple SARS-CoV-2 antigens in a cohort of patients presenting with COVID-19 syndrome. Analyst 2020, 145, 5638-5646