<p>&nbsp;</p> <p>Magnetic LPG gas tank level indicator.</p> <p>Never run out of gas again </p> <p>Measure your gas cylinder contents with this level indicator.</p> <p>Simply attach it to your gas tank cylinder and it will show you how much gas is left in your tank.</p> <p>Safely and accurately measures the gas capacity, according to the gas temperature test, measuring in the temperature range of -10 C - 120 C.</p> <p>Safe & accurate</p> <p>Reusable Works on LPG (propane) & butane cylinders Magnetic backing allows for easy re-use on exchange bottles.</p> <p>How to use:</p> <p>Place your gas level indicator on a clean area on the lower half of the cylinder.</p> <p>Turn on the gas and wait 10 minutes before you can read your Indicator.<br>In the winter the bar on the left will be active, and in the summer the bar on the right will be active.</p>