The global entrance optic is designed for the double Brewer spectrophotometer. The cosine error is less than 6 % for incidence angles between 0° an 80°. The systematic uncertainties of global solar irradiance measurements with this new entrance optic are considerably reduced compared with measurements with the traditional flat diffuser.

The shadowarm fits to the brewer spectro-photometer. It can be mounted on the high-grade-steel holder of the quartz dome. With this arm it is possible to measure the diffuse solar radiation by blocking the direct solar radiation.

The UV-J1015-STABTEST package can be used to determine the stability of UV measurements made with the Brewer spectrophotometer.
It includes the calibration lamp (KS-J1011), a transportation case (KS-J1011-CASE), one spare lamp (KS-J1011-LAMP) and the Brewer calibration adapter (KS-J1011-ADAPT-BREW).