The ROF-QPD-A from Beijing Rofea Optoelectronics is a Photodetector with Wavelength Range 400 to 1100 nm, Rise Time 35 µs, Bandwidth 100 Hz, Active Area Diameter 5.3 mm (Dia) (photosensitive), Dark Current 0.015 nA. More details for ROF-QPD-A can be seen below.