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Subject Topic: Gas Bottles, measuring gas left
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18/5/2022 at 10:30am
 Location: South Wales
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Hi all,

What handy gadgets (if any) do people use to help indicate how much gas left in bottle etc?


via mobile 18/5/2022 at 10:53am
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Scales. The empty weight of the bottle can be found on or near the neck.
Weigh the bottle and subtract the empty weight then you know how much gas is left.
Failing that get a Safefill or similar style bottle and just look at the level.


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via mobile 18/5/2022 at 11:21am
 Location: Milton Keynes
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Regardless of bottle weight plate states I always weigh them before use and stick a small label on with weight written on it. Then weigh before a holiday to determine how much left. Having been caravanning 49 years I know how much I use on each location. If enough left in bottle do not need to carry my secong bottle.

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2023 Swift Archway Woodford, MK3 Kuga ST Line X 190 ps AWD Auto
Now 52 years Caravanning completed.


via mobile 18/5/2022 at 11:35am
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Use a luggage weigher about 2quid from Home Bargains to weigh bottle.

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Every day should be a holiday!


18/5/2022 at 3:02pm
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https://www.youtube.com/watch?v=gLQPczOpBhA

A great video from the Trudgians.........


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via mobile 18/5/2022 at 3:18pm
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Safefill refillable cylinder, can see how much liquid is in, then just go and top it up when needed at my local Morrisons fuel station, 83p a ltr.

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Skoda Octavia Estate 2.0TDi 4x4 (2012) towing a Compass Omega 482 (2014)


19/5/2022 at 9:59am
 Location: London
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Cheap and cheerful luggage scales, deduct the marked TARE weight of the cylinder (Calor typically have two numbers stamped on the disc around the valve which is the Tare in pounds and ounces, so you need to convert to Kg to use - gas contents stated in Kg!) from your weighed figure to get residual gas amount. It's a reliable method that works for all/any cylinder.

If you measure and record your usage for each trip, you get an idea of how long the residual gas will last you and when you'll likely need to swap cylinders before running out.

Don't bother with 'Contents' gauges fitted to the valve, they are simple pressure gauges and the pressure doesn't drop until the cylinder is nearly empty, bit late to warn you then! The magnetic 'sticker' type (thermometer) that you affix to side of metal cylinders ONLY work when you are drawing significant amounts of gas off which causes a temp drop above the liquid level, so not much use for checking before setting off on a trip! The ultrasonic devices that either get applied to the side to check or are fitted under the cylinder work OK, but only on steel cylinders and are rather expensive.

If you can't/don't want to run to the significant expense of a transparent refillable Safefill cylinder (you've got to use a lot of gas to break even on cylinder costs), then a transparent Gaslight exchangeable cylinder from Flogas has the same visible level/contents ability.


via mobile 19/5/2022 at 12:06pm
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Would it not be easier just to buy a gauge that attaches to the valve. That way you'll have a constant reading of how much gas in bottle.


via mobile 19/5/2022 at 1:07pm
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No, because they are historically inaccurate.

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XVI yes?

As well is two words!
How does a sage know everything about everything? or does he? or does he just think he does?
Remember, if you buy something you bought it, not brought it.


19/5/2022 at 4:32pm
 Location: London
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Quote: Originally posted by Will B on 19/5/2022
Would it not be easier just to buy a gauge that attaches to the valve. That way you'll have a constant reading of how much gas in bottle.



As I said in earlier post, they are really only pressure gauges (re-labled with 'contents' scale), and the pressure doesn't drop off until cylinder virtually empty, real chocolate teapot stuff, reads little better than something/empty! You need something that truly measures CONTENT.


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20/5/2022 at 3:19pm
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I 'swill' them about. You can hear and feel the gas sloshing around. And its bloody amazing how much is in there when they are 'empty'. I was going to swap one i use for the home bbq that was on the fumes, but the local shop was out. So, i just kept on using it. I got another three and a half bbq's out of it. Luckily, i was ready for when it went, as i'd bought a 13kg spare off FB marketplace for £40 at 3/4 full - with a gauge.


24/5/2022 at 12:19am
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hope you dont mind me tagging this onto your thread ......

yippee , calorgas now back in stock at my local calorgas dealer, and a local diy shop.
warning though, a 15kg butane just cost me £50

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I predict a riot !!


26/5/2022 at 12:10am
 Location: S Wales The Badland
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Quote: Originally posted by Monty15 on 19/5/2022
Cheap and cheerful luggage scales, deduct the marked TARE weight of the cylinder (Calor typically have two numbers stamped on the disc around the valve which is the Tare in pounds and ounces, so you need to convert to Kg to use - gas contents stated in Kg!) from your weighed figure to get residual gas amount. It's a reliable method that works for all/any cylinder.

If you measure and record your usage for each trip, you get an idea of how long the residual gas will last you and when you'll likely need to swap cylinders before running out.



The stamped label around the neck has TWO numbers on it - so you need to work out which is the one you need.

A while back I had a 6kg propane bottle & the two numbers on it were:

"18 10" and "18/06"

One was the tare weight, and the other's the date of refill.



-------------
SamP


26/5/2022 at 11:53am
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Helpfully (!!) or rather not, Calor mark the the tare weight as two 2 digit numbers without any other characters like '/' or '-', AND it's in pounds and ounces! That'll be the 18 10 figures. Short of not marking it at all they couldn't make it much more difficult!

The 18/6 figure is probably date of manufacture and is coincidentally similar, don't think the collar is changed at each refill.

The markings on the collar seem to be one of the worlds best kept secrets, if you don't know what they are, woe betide trying to find out from any official source, your only hope is a friendly experienced user!


via mobile 26/5/2022 at 1:14pm
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Didn't know a pressure gauge was inaccurate. I stand corrected.


26/5/2022 at 2:33pm
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Quote: Originally posted by Will B on 26/5/2022
Didn't know a pressure gauge was inaccurate. I stand corrected.



It's not pressure gauges per se (regardless of whatever the scale label indicates) that are inaccurate, they can be highly accurate on pressure indication, it's that it's a very poor method/indicator of liquid gas contents, as the gaseous pressure doesn't vary greatly with varying liquid contents until virtually empty of liquid, at which point it's rather stating the bleeding obvious! The scale should read 'Some Gas'/'Empty' in a rather one of two states On/Off fashion, not imply that there is a certain volume remaining like a car fuel gauge!



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