Propane Tank Gauge. ... Tired of wondering how much your tank has left? Easy-to-use Propane Gauge lets you know at a glance whether you're good to go or in need of swap. Simply attach between tank outlet and appliance and you'll always have a clear idea of your supply. Built-in safety features also help ensure secure fuel usage for any application. Accurately displays remaining propane levels Detects system leaks and cuts gas flow by 95% if leak is present Use all the gas in the tank, saving time and money Easy to connect Large, easy-to-read gauge display No tools required. Weighs 13 ozs. Order yours ONLINE now. Propane Tank Gauge