The MS-410 pyranometer measures the broad-band global solar irradiance. The MS-410 is perfectly suited for sampling 10-minute averages of the solar radiative flux in horizontal or tilted configurations. It is fully compliant with the ISO9060 "First Class" norm. The flat sensor surface, coated with a special, highly absorbing black paint, is protected by two transparent hemispheric glass domes. The MS-410 has a practical light-weight anodized aluminum housing and a stable low TC detector. These features, together with the two, high quality machined hemispheric glass domes are the key to the excellent performance characteristics of the MS-410.