The requirement is for a Guildline Autosal Salinometer Model 8400B and associated accessories, including a calibration certificate, digital manual, 84007 maintenance kit, OSILPC custom Autosal packing case, 84105 external sample pump, ACI Autosal computer interface, and three packs of P-Series IAPSO Standard Seawater (10 x 200 ml, salinity 35). Brand-name justification applies, and Buy American provisions apply, with a Buy American waiver for non-availability executed for this procurement. Further details are provided in the attached solicitation.