The National Institute of Standards and Technology (NIST) is seeking information from vendors capable of upgrading a SQUID (Superconducting Quantum Interference Device) Magnetometer to a closed cryostat system that eliminates the need for weekly liquid helium usage. The upgrade aims to maintain the system's technical specifications, including sensitivity and a temperature range of 1.8 K to 400 K, while ensuring that all equipment provided is new and not refurbished or prototype. This project is critical for the Physical Measurement Laboratory's Spin Electronics Group and must be completed onsite in Boulder, Colorado, within a 12-month timeframe after contract award. Interested organizations should submit their capability statements to Lisa Stevens at lisa.stevens@nist.gov, with a deadline specified in the notice, as this is a sources sought notice and not a request for proposals.