Practical Salinity Unit
type: Unit
description: Practical salinity scale 1978 (PSS-78) is used for ionic content of seawater determined by electrical conductivity. Salinities measured using PSS-78 do not have units, but are approximately scaled to parts-per-thousand for the valid range. The suffix psu or PSU (denoting practical salinity unit) is sometimes added to PSS-78 measurement values. The addition of PSU as a unit after the value is "formally incorrect and strongly discouraged".
source: pf0000047932
applicable system: ASU
applicable system: CGS
applicable system: CGS-EMU
applicable system: CGS-ESU
applicable system: CGS-GAUSS
applicable system: IMPERIAL
applicable system: PLANCK
applicable system: SI
conversion multiplier: 0.0
conversion multiplier SN: 0.0E0
has dimension vector: A0E0L0I0M0H0T0D1
has quantity kind: DimensionlessRatio
has quantity kind: Transmittance
informative reference: https://en.wikipedia.org/wiki/Salinity#PSU
symbol: PSU
unit for quantity kind: DimensionlessRatio
unit for quantity kind: Transmittance