The Original Grill Gauge Propane Scale - $10.88

No more worries about running out of propane in the middle of a cookout. This handy gauge lets you know exactly how much gas is left in a standard 20-lb. propane tank just lift and take a reading. No need to disconnect the hose to your tank to view its contents. Engineered and calibrated for precise measurements. No batteries required. - $10.88