Level displacer transmitter

A boiler 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 the displacer is 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.

A shore, on the other hand, Boiler level displacer transmitter works very well. At an oil refinery you will find lots of level displacer transmitters, for water levels as well as petroleum product levels.