For measurement of high-powered LEDs and sources, Avantes offers large integrating spheres, called AvaSphere-100, -150 and -200mm. The number corresponds with the internal diameter of the spheres in millimetres.
The 100, 150, and 200 models come with three ports: at 0, 90 degrees, and NP. One port is fitted with a baffled SMA-905 connector. One port is equipped with a port plug, and the 3rd is used for illumination or sampling.
Spheres come with a post mount. All spheres can be attached to spectrometers via fiber-optic cables, and the entire system can be irradiance calibrated.