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Kitchen propane tank guage

Kiniyeow

By Kiniyeow
in Chiang Mai

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Gsxrnz Platinum Member

Gsxrnz

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Try the "shake" method.  And always have a spare full bottle to change over immediately.

 

I know one bloke that has two bottles all connected with valves, but only has one bottle feeding the burner.  If the bottle in use expires he simply turns on the other full bottle and there is instant gas.  He then makes sure he refills the empty bottle the following day and reconnects it so he's never out of gas.

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worgeordie Star Member

worgeordie

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This is a real crisis issue since delivery of full bottles takes about 15 minutes in most places.

Except,Sundays,Holidays and after 8 at night,best have spare bottle.

as Sods law says it will be when you are cooking a special meal.

regards Worgeordie

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noendtoit Senior Member

noendtoit

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There is only one kind of gauge that will tell you how much LPG you have left and that is a weight gauge.  A pressure gauge doesn't work because at long as there is any liquid LPG in the bottle, it boils off into a gas at a constant pressure at any given temperature (Boyle's Law).

 

BBQ's in the US often come equipped with cheap spring weight gauge that the tank hangs on (not very accurate).  If you really want to know how much fuel you have in the tank, keep it on a scale and note the weight when full.  Don't bother with the empty weight, because every bottle may weigh a little differently.  Instead, the empty weight (tare weight) is marked on every bottle.  So when your bottle is approaching the tare weight, it's time for a refill.  There really isn't any other way with LPG

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ThaidDown Gold Member

ThaidDown

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Agreed that a pressure gauge does not show how much gas is left in a tank but it will show when the gas is running out.

 

Whilst there is liquid LPG in the tank the pressure is almost constant, depending on the ambient temperature and the exact composition of the LPG (proportions of Butane/Propane etc).

 

When there is only gas in the tank (the liquid has all 'boiled off') further use will cause the pressure to fall. Obviously when it shows zero the tank is empty.

 

I have one of these gauges in use, plus it has a timer that auto shuts off the supply to the burners after an adjustable time.

 

However cannot help with a supplier, sorry, as we have had this one more than 20 years and cannot remember how we came by it. In fact I cannot recall having seen one in a shop but sure that they are available somewhere.

 

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noendtoit Senior Member

noendtoit

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Agreed that a pressure gauge does not show how much gas is left in a tank but it will show when the gas is running out.

 

Whilst there is liquid LPG in the tank the pressure is almost constant, depending on the ambient temperature and the exact composition of the LPG (proportions of Butane/Propane etc).

 

When there is only gas in the tank (the liquid has all 'boiled off') further use will cause the pressure to fall. Obviously when it shows zero the tank is empty.

 

I have one of these gauges in use, plus it has a timer that auto shuts off the supply to the burners after an adjustable time.

 

However cannot help with a supplier, sorry, as we have had this one more than 20 years and cannot remember how we came by it. In fact I cannot recall having seen one in a shop but sure that they are available somewhere.

 

Absolutely correct.  but by the time the gas boils off, the tank is effectively empty.  When the liquid forest disappears, there might be enough gaseous gas left to heat a hot dog, but there certainly would not be enough left to finish grilling a half cooked chicken.

 

In other words, a pressure gauge would give so little advance notice that it would fail to serve it purpose (of advance notice).  It seems to m that the OP might like to know when the tank is down to 5% or so, so he can get another tank.  Actually having two tanks, so that you can just exchange is the best method.

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ThaidDown Gold Member

ThaidDown

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In other words, a pressure gauge would give so little advance notice that it would fail to serve it purpose (of advance notice).  It seems to m that the OP might like to know when the tank is down to 5% or so, so he can get another tank.  Actually having two tanks, so that you can just exchange is the best method.

 

Not arguing with you the but the notice period is significantly more than that. Not big gas users but a couple of days use is obtained after the pressure starts to fall. (A couple of full meals cooked at least).

 

Observation based on use of pressure gauge over long period.

 

Certainly agree to have spare (full) tank for changeover (which we have) or even two tanks 'plumbed in' with shut off valves for instant changeover.

 

(note we use the 15Kg of gas tanks)

 

 

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