The National Institute of Standards and Technology (NIST) intends to procure a Swabian Time Tagger 20, a specialized time tagging unit for single photon counting, on a sole source basis from Swabian Instruments USA, Inc. This acquisition aims to enhance NIST's research capabilities in developing a measurement test suite for quantum network components and protocols, necessitating a device that meets specific technical requirements, including at least eight input channels and a jitter resolution of 34 picoseconds. The Time Tagger 20 is critical for conducting state-of-the-art measurements of single photon devices, ensuring compatibility with existing software and research methodologies. Interested parties may submit their capabilities in writing to Brian Jamieson at brian.jamieson@nist.gov by July 24, 2025, at 12:00 PM Eastern Time.