# Leakage rate units

by Runei
Tags: leakage, rate, units
 P: 140 Hello, At my work I'm working with testing the leakage rate of a gas system, and right now im trying to gain some understanding of it all. However, there are some things which are very confusing to me, in regards to these rates. Searching the internet I find several different ways to describe the leak rate, some of mL/min and some are mbar*mL/min. To me, the first one seems to only be usable in systems with incompressible liquids, and the second is usable in systems using gas. My intuition so far tells me that using the ideal gas law, the change in pressure over time (due to leakage) will be equal to $\Delta p \cdot V = \Delta n RT$ The temperature can be approximated to be constant, and the volume of the system is constant (its an aluminium gas string with valves and such). Using this, we correct leakage rate units would be $\frac{\left[p\right]\left[V\right]}{\left[t\right]}$ Is this all there is to the story, or is there something I am missing? Thank you,