What happens when you increase the salinity

There are parts of the ocean where hardly any rain falls but warm dry winds cause lots of evaporation. This evaporation removes water – when water vapour rises into the atmosphere, it leaves the salt behind, so the salinity of the seawater increases. This causes the seawater to become denser.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.