30L-Series

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Low Salinity Standard Seawater, (S = 30) is accurately calibrated in conductivity ratio for the temperature range 15°C to 30°C. This standard is used in conjunction with P-Series to determine instrument offset and linearity at lower salinities.

Standard Seawater, as approved by the International Association for Physical Sciences of the Ocean (IAPSO), is the only transfer standard for Practical Salinity that is recognised

by all the major oceanographic bodies.

The standards, which have precisely known electrical conductivity ratio, are used for the calibration of salinity measurement devices. IAPSO Standard Seawater is available in high quality, crimp sealed glass bottles, each containing ca.200 ml of natural seawater. Each bottle's label carries information on its conductivity ratio (K15) and salinity according to the Practical Salinity Scale 1978 (PSS78).

The bottle is made from pharmaceutical-grade glass, which minimises any interactions with the seawater and thereby increases the shelf-life of the product.

The bottle’s narrow-neck is sealed with a halobutyl, polymer-coated bung, providing a totally impervious barrier to evaporation. A secure, tamper-evident seal is made with a colour-coded alloy crimp-cap.