Operating Principle
The displacer level transmitter (or any other buoyancy level
transmitter) uses the effect of buoyancy. When the displacer is immersed in the
process fluid, this buoyancy effect will make the displacer lighter than the
non immersed displacer. This change of displacer weight is then detected by the
sensor (whether use torque tube or LVDT) and then translated as a fluid level.
