The National Institute of Standards and Technology (NIST) is seeking responses for the procurement of a Thyroid Bioassay Counter System to enhance its radiation safety program at the Gaithersburg, Maryland campus. The system must be capable of monitoring personnel exposure to I-123, I-125, and I-131, featuring a mobile platform, advanced detection capabilities, and automated calibration functionalities. This procurement is critical for restoring NIST's ability to monitor radiation exposure effectively, ensuring compliance with safety regulations. Interested vendors should submit their responses, including company details and any feedback on the requirements, to Robert Singman at robert.singman@nist.gov by the specified deadline, as this notice is part of market research and does not constitute a commitment to award a contract.