A level displacer (a float heavier than the water) is
suspended to a spring balance by means of a stainless steel cable or a rod.
When semi-submerged the weight of the displacer changes when the water level
varies and the change in weight is converted into a level signal that
corresponds to the level in the boiler. 0% of water in the level glass
correspond to 4 mA (3 psi) and 100% corresponds to 20 mA (15 psi). This level
measuring method is not so very common onboard ships since the measuring result
is very influenced by the ship’s movements. Ashore, on the other hand, it
works very well.
A level displacer (a float heavier than the water) is
suspended to a spring balance by means of a stainless steel cable or a rod.
When semi-submerged the weight of the displacer changes when the water level
varies and the change in weight is converted into a level signal that
corresponds to the level in the boiler. 0% of water in the level glass
correspond to 4 mA (3 psi) and 100% corresponds to 20 mA (15 psi). This level
measuring method is not so very common onboard ships since the measuring result
is very influenced by the ship’s movements. Ashore, on the other hand, it
works very well.