As the flow passes through the chamber, the displacer piston is moved downstream. Dividing the volume of the chamber by the time it takes for the displacer to move from one detector to the other gives the calibrated flow rate. This rate is then compared to the reading of the flow meter ...
Figure 2: Displacement level gauges operate on Archimedes’ principle. The force needed to support a column of material (displacer) decreases by the weight of the process fluid displaced. A force transducer measures the support force and reports it as analog signal. Hydrostatic devices 3. Displace...
The column displaces a volume of fluid equal to the column’s cross-sectional area multiplied by the process fluid level in the displacer as the process fluid level gets higher. A buoyant force equivalent to this displaced volume multiplied by the process fluid density pushes upward on the disp...