These tubes are more sensitive than other detectors for UV and visible radiation and features very low noise levels and a number of orders of magnitude. The Photomultiplier Tubers (PMTs) provide a full-ranged spectral sensitivities both in end-on and side-on versions and even PMT system components that support DC, modulated and pulsed measurements. Nanoseconds to milliseconds pulse measurements are also possible. PMTs provide a cost-effective and lesser light level measurement solution. We offer components so you can build your own system rather than providing the complete PMT systems due to a number of permutations. With this strategy, we give an overview and guide you on choosing components.