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products   companies   categories Marine science & technology Marine scientific services (11) Marine scientific products (16) products   companies   categories Marine scientific services Surveys (1) Calibration (2) Modelling (3) Consultancy (6) Measurement (4) products   companies   categories Calibration Ocean Scientific International Ltd Atlantic Seawater Conductivity Standard   Filtered natural ocean seawater with a salinity of 35. Calibration centre   Marine instrument calibration, service and repair centre. IAPSO standard seawater   OSIL are the only recognised provider of IAPSO Standard Seawater and provide salinity calibration standards worldwide. Low nutrient seawater   Nutrient standards   Oxygen standards       RS Aqua Limited Oxygen Sensors   Exhibits very good resistance to fouling and is usable in fresh through to saline waters. Rated to 6000m