IAPSO P35 Standard Seawater and Salinity Packs

The International Recognized Calibration Standard for Salinometers! The International Association for Physical Sciences of the Ocean (IAPSO) Standard Seawater manufactured by Ocean Scientific International (OSIL) is available in North America from Guildline Instruments.This Seawater is used to standardize Guildline’s Autosal® and Portasal® Salinometers, and for the calibration of other salinity measuring instruments. 

IAPSO Standard Seawater is the only conductivity/salinity transfer standard for Practical Salinity that is recognized by all the major oceanographic institutes around the world. IAPSO Standard Seawater is available in high quality, glass bottles, each containing 200ml of natural seawater. The bottle label carries information on its conductivity ratio (K15) and salinity according to the Practical Salinity Scale 1978 (PSS78). Please note that in the US, Guildline Instruments is the exclusive distributor of IAPSO Standard Seawater and all other Seawater products that are sold from OSIL.