CO2 tank pressures

[tubamanandy]

From memory, my 2kg FE bottle starts off around 50-60 when new according to my twin-stage regulator.

Is there any easy way to know when it is just about to run out ? (eg. down to 10 or 20)

Not sure if you would get a gradual continual fall in pressure or as soon as it gets to eg. 20 it drops immediately. Can someone enlighten me ?

 

[Nathaniel Whiteside]

My Jbl one starts dropping slowly down to zero, it gives you plenty of time to see. Days if not weeks.

As soon as it starts dropping just hook up another one and get the used one refilled.

 

[ian_m]

Yes the pressure of a full FE is about 55bar and as the gas is used it stays at this pressure due to the liquid CO2 evaporating keeping the pressure constant. Once all the liquid has gone, the tank pressure will then start dropping. Time to when CO2 stops going into the tank depends on you usage, obviously, but on my 180l tank I get 3-4 days notice before the CO2 stops.