A portable oxygen sensor based on a CMOS detector

This work describes a portable and sensitive optical oxygen sensor based on a consumer CMOS image sensor array and polarization signal isolation. The CMOS sensor was fully characterized and the feasibility of using it as an optical detector was explored. The oxygen sensor is based on quenching of platinum octaethylporphine (PtOEP) luminophore. Sensitivity of the demonstrated sensor is comparable to that of benchtop spectroscopy-based systems. The low-cost and high sensitivity of the demonstrated optical sensing approach make it ideally suited for applications in point-of-care biotechnology.