I used the chiller and pump to the membrane for the permeate side. There is the problem to measure the excess water flux time by time. Let me know the possible ways to get the flux.
You can use two cold traps which are simultaneously connected to the vacuum pump in permeate side. During experiment, the permeate can collected in one particular traps while other remains closed. once enough amount of permeate will collected, you can disconnect the trap and continue the experiment in another trap. By this way, you can measure the permeate continuously with time without stop the experiment. Herewith, I have attached the word file of such type of assembly.
I want to weigh the permeate water coming out from the membrane cell before going back to the chiller. I have a problem I cannot measure the permeate chiller. So, I have to put the permeate tank.