What is a tank gauge (percentage gauge)?
A tank gauge is a mechanical meter mounted on a stationary propane tank that displays the liquid level as a percentage, typically using a float-and-arm mechanism to show fill capacity.
The percentage gauge, sometimes called a float gauge, is the dial-style meter you see on the side of most residential and small commercial propane tanks in Florida. It works through a float that rises and falls with the propane liquid level inside the tank. As the float moves, it turns an arm connected to a pointer on a dial face marked from 0 to 100 percent.
Reading the gauge is straightforward: the pointer indicates what portion of the tank holds propane. A reading of 80 percent means the tank is four-fifths full. At 25 percent, the tank is one-quarter full and nearing the point where many suppliers recommend scheduling a refill.
These gauges matter because they let you monitor your tank without guesswork. Most propane users in Florida watch for a reorder point between 20 and 30 percent. Waiting too long (below 10 percent) risks running empty, while reordering too early wastes money on frequent truck visits. The gauge also helps you spot leaks or unusual consumption if the level drops faster than expected.
Percentage gauges are durable and require no power, making them reliable in the field. They can wear over time, especially in humid coastal areas, and may become hard to read if the dial face fades. If your gauge stops moving or gives inconsistent readings, propane suppliers can service or replace it.