6. Reversible Optical Sensor Strip for Oxygen
The combination of two-color dyes convertsinstrumental read fluorescence intensity signal into visual color change, and leadsto the development of colorimetric oxygen sensor strip. Oxygen concentrationcan be visualized by distinct color using bare eye. Such sensors can be stickor painted on any sites of interest (such as clothes, windows, glasses, andsurface of aircraft), and oxygen level can be directly read by their color.