The U.S. Geological Survey (USGS) is seeking quotations for the procurement of a Universal Continuous Flow Interface, specifically the Conflo IV or an equivalent, for its Geology, Energy, and Minerals Stable Isotope Laboratory (GEMSIL). The required system must be fully compatible with the Delta V Plus Isotope Ratio Mass Spectrometer (IRMS) and include features such as automated gas flow control, self-diagnosis capabilities, and support for multi-device management. This equipment is crucial for conducting precise isotopic analyses, which are essential for various geological and environmental studies. Interested vendors must submit their quotations electronically to Mindie Dixon at mdixon@usgs.gov by the specified deadline, with the anticipated award date set for January 5, 2020. All vendors must be registered at https://www.sam.gov to be eligible for the contract.