Salinity Measurement with an optical Refractometer
The easiest way and probably the most cost effictive way (compared to electronic salinity measurement devices)
is an optical refractometer. This device is based on the physical principle that light is refracted differently
depending on the salinity in the medium applied on the prism.
This is a refractometer for salinity purchased from greinorm.com:
When the medium to be tested is applied on the prism with a pipette (make sure you've calibrated
the refratometer before by applying destilled water on the prism and adjusting the grey/bluish "line"
to zero) you see an image like this:
By reading the value on the scale where the greyish/bluish line appears, you can determine the salinity.
In this case we have a salinity of about 11% or 110 gramms of salt per liter of water.
