How much is left?

[mrcheese]

I am on my first bottle of Argoshield. I think the pressure when new was about 180psi. It is now about 65psi. Does it mean I have about a third left or does it not work like that? I can sort of imagine it is non linear so the pressure will start to drop rapidly as it empties. Trying to avoid running out of gas at the weekend, but don't want to waste what it left, if there is quite a bit, when I exchange the cylinder.

Thanks,

Paul.

 

[malcolm]

It is near enough linear so you've got a third left. Depending on the accuracy of the gauge you might still have a fair bit when it reads zero - best to keep on going until it runs out.

 

[mrcheese]

Many thanks.

Paul.

 

[Chickenjohn]

I have a few of those tiny bottles around so I can keep welding for a little longer even after the big bottle runs out- a stop gap till I get a new full one.

 

[Hitch]

Im often suprised how long you can go once the cylinder apears to be empty, according to the regulator.
Not reccomended if your doing critical work, or somewhere that you couldnt grind out.