FOR SEVERAL YEARS I have used a Truma LevelControl gas monitoring unit. For those who haven't come across them, the LevelControl fits magnetically to the underside of the gas bottle, measures its contents and transmits the data to your phone via Bluetooth.
The device fits in the bottom rim of the cylinder, making it suitable for all sizes of bottle.
While the LevelControl has always worked perfectly, sadly, the same can't really be said for this particular operator!
Truma also supplies a handy magnetic warning label, which attaches to the side of the gas bottle to remind you that the LevelControl is fitted.
However, that reminder
