NASA's National Aeronautics and Space Administration (NASA) is seeking to procure R9880 Photomultiplier Detectors, specifically the R9880U-210 and R9880U-20 models, which are critical for various analytical applications within their research programs. The procurement is aimed at acquiring these specialized detectors, which feature advanced specifications such as a borosilicate window, a metal channel dynode structure, and a wide operational temperature range, essential for high-performance laboratory environments. Interested vendors are invited to submit their qualifications in writing by January 31, 2025, as NASA plans to issue a sole source contract to HAMAMATSU CORP, the exclusive supplier for these detectors, while retaining the option for competitive procurement. For further inquiries, interested parties can contact Lindsey McLellan at lindsey.m.mclellan@nasa.gov, referencing ID 80NSSC893842Q.