**Bubbler Liquid Level Transmitter Calculation**

Image Credits : Rosemount

Let **X** equal the vertical distance between the minimum and maximum measurable levels (100 in.).

Let **SG** equal the specific gravity of the fluid (1.1).

Let **h** equal the maximum head pressure to be measured in inches of water.

Let **Rang**e equal zero to h.

Then

** h = (X)(SG)**

= 100 x 1.1

= 110 inH2O

Range = 0 to 110 inH2O

Source : Rosemount

Thank you for the information. How do one determine the amount of air flow from the rotameter to he pressure transmitter? Is there a calculation for this

It is my understanding that the purge rate isn’t critical. Typically set at 1-2 scfh.