The new PD 100 photodiodes are Instrument Systems’ high-performance detectors for the fast and highly accurate measurement of radiant flux in the VIS to near IR spectral region. In combination with a 3-port ISP integrating sphere and a CAS spectroradiometer, they enable particularly fast and precise measurement of the luminous flux and absolute radiant power in production. Also pulsed light sources (e.g. VCSEL) or low light test objects can be measured.