The Warning Measurement System of Erythema Time with Ultra Violet Photodevice and Properties of Biological Filtration Materials

This proposal is directed toward the development of innovative high-efficiency UV photodevice based on the wide bandgap III-nitride (GaN-based) semiconductors for reliable operation at the solar radiation action spectrum for human. This paper uses the UVM-30 photodetector to measure the UVI and the max exposure time (Erythema Time) in sun real time with a simple linear function relationship circuit, and introduces the function, performance, system configuration as well as the partial flow chart of the flowmeter.