How much is left? - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Bottling/Kegging > How much is left?

Reply
 
Thread Tools
Old 10-19-2009, 05:42 PM   #1
Richardwhittaker
Recipes 
 
Sep 2009
Amherstview, Ontario, Canada
Posts: 139


Does anyone know of any trick to tell how much CO2 is left in a cylinder? I have two tanks they both show 750 pound on the regulator however One was filled a little while ago and the other I got with some gas in it. I have heard that as long as the have liquid CO2 in them the pressure stays about the same? Is this true?

Richard
__________________
<insert clever saying here>

 
Reply With Quote
Old 10-19-2009, 05:58 PM   #2
Dwain
 
Dwain's Avatar
Recipes 
 
Feb 2009
Hill Country, TX
Posts: 1,135
Liked 5 Times on 5 Posts


Weigh them. I don't remember what they are suppose to weigh. Call your gas supplier and thy'll tell you. The bottles might be stamped with th tare weight (T.W.). Luck - Dwain

 
Reply With Quote
Old 10-19-2009, 06:11 PM   #3
humann_brewing
More Humann than human
HBT_LIFETIMESUPPORTER.png
 
humann_brewing's Avatar
Recipes 
 
Oct 2008
the sun
Posts: 15,535
Liked 329 Times on 325 Posts


dwain has it right, get the tare weight of the cylinder, usually on the top portion labeled T W, then get a scale and subtract the tare weight from the scale weight. Don't try to rely on the pressure reading as it varies a lot depending on what temp you have it at.

 
Reply With Quote
Old 10-19-2009, 06:15 PM   #4
david_42
 
david_42's Avatar
Recipes 
 
Oct 2005
Oak Grove, Oregon, USA
Posts: 25,597
Liked 155 Times on 145 Posts


Quote:
I have heard that as long as the have liquid CO2 in them the pressure stays about the same? Is this true?
Correct. Until you get to the running on fumes stage, tank pressure is a function of temperature. On the other hand, when the gauge hits 300 psi, start planning on getting more. With two tanks, I just run one down, then stick it in the van. My supplier is 25 miles away, so I'm not willing to make a special trip, but I get out there 3-4 times a month.

Even with a #5 tank, the fumes will push a couple cornies or carbonate one.
__________________
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"

"I would like to die on Mars, just not on impact." Elon Musk


 
Reply With Quote
Old 10-19-2009, 07:24 PM   #5
JKoravos
Recipes 
 
Jul 2009
Chelmsford, MA
Posts: 1,203
Liked 74 Times on 55 Posts


Most 5# tanks weigh about 17# when they're full, but it can vary. Finding the tare weight and subtracting from the total weight is the best way.

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Is this left over krausen? Octang Beginners Beer Brewing Forum 2 07-12-2009 06:27 PM
iodophor left in keg stephelton All Grain & Partial Mash Brewing 9 06-01-2009 04:28 PM
Left over grains boothbrew Extract Brewing 11 10-23-2007 09:36 PM
Left Overs Wit? paddy21 Extract Brewing 2 10-18-2007 02:35 AM


Forum Jump