The NOAA Northwest Fisheries Science Center seeks sources for a Mettler Toledo XPR3 ultramicro balance and a Mettler Toledo Titrator Compact G20S Rondolino to support critical Pacific salmon research and ocean acidification experiments. The ultramicro balance is needed to replace discontinued equipment for weighing chemicals (0.5–1.0 mg), while the titrator is required for total alkalinity assessments at the Manchester Research Station. Performance of services will be at the NWFSC’s Environmental Physiology Program, with delivery required within 90 days of award. No budget amount is specified. This is a sources sought notice for market research, not a solicitation.