It seems to be a cliché, but a gas bottle is always empty when you just want to start cooking or the heating comes on. With the E-Gaslevel module from E-Trailer, this won't happen to you in the future. The wireless sensor measures the content of the gas bottle and warns you when the gas supply is running low. This way you can replace the gas bottle in time and won't get in trouble because of a running out refrigerator or stove or a cold heater. The e-trailer app also converts the percentage into kilograms. You simply place the e-gas level on the bottom of the steel gas bottle with magnets or with an optional holder for aluminum gas bottles.