Gas Bottle level gauge

[77racing]

I use the 7kg propane gas bottles and want to buy a regulator that has a built in level gauge. Have looked but not sure what would be good and some where give the right readings. Anyone got one or any recommendations please.

[77racing]

bristolracer said:

From what I've read these gauges don't work very accurately.
Pressure from the bottle is a constant until the gas is nearly gone.

I use a luggage scale, the weight of the empty bottle is marked on the disc around the neck of the bottle.
Take a from b and you have your answer

Ok the disc round the neck of a new bottle says 8.3kg I have weighed the new bottle at 13.88kg as you suggest.so that leaves 5.58kg . Am I right in thinking flo gas are under filling there 7kg bottles by 1.42kg .