Refractometer is precision optical instrument that operates on the principle- as the concentration or density of a solution increases, its refractive index changes proportionately. The refractive ...

Salinity is a measure of the ‘saltiness' of seawater ... The special reference material used to calibrate salinity instruments, IAPSO Standard Seawater, is manufactured by a single company ...

This will help scientists confirm the existence of the ocean believed to lie beneath the moon's icy crust and measure its depth and salinity, according to the statement. The radar instrument ...