It measures total, diffuse, and direct irradiance at seven narrowband wavelengths in the UV-B and UV-A regions. The shadowband enables the instrument to measure all three components of solar irradiance with one detector. The UVMFR-7 system includes the YESDAS-2 datalogger and data analysis software. The MFR-7, a shadowband instrument for the visible/NIR, is also available.