The National Institute of Standards and Technology (NIST) is seeking to procure a Laboratory Densitometer/Viscometer through a sole-source contract with Anton Paar USA, Inc. This procurement aims to enhance the capabilities of the Bioprocess Measurements Group (BMG) in accurately characterizing biopharmaceuticals by providing a combined density and viscosity measurement instrument, which includes specific hardware and software requirements, installation, training, and an initial one-year warranty. The successful contractor will deliver the instrument along with necessary consumables and operational manuals, adhering to strict operational and safety protocols for accessing the NIST campus. Interested parties must demonstrate their capability to meet these requirements by submitting their responses to the Contract Specialist, de Ionne Jones, at deionne.jones@nist.gov by the specified deadline, with an estimated contract award date of July 25, 2025.