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Does Cold Temperature Affect the Level Gauge on a Propane Tank?
Similar to most other types of materials, propane is affected by cold temperatures. When the temperature declines, the propane gas contracts. That reduced level of gas inside the tank is reflected by the gauge which reflects the level on the tank. Usually, this occurs whenever a homeowner checks the gauge in cold conditions and sees the amount of the tank level before and after delivery. Depending on the conditions, the tank level might not rise as much as expected.

Propane Tank Level Gauge
The propane tank's gauge shows you what percentage of the tank is full. Normally, tanks are not filled over 80% in order to allow the gas to expand on hot temperatures. For instance, a 500 gallon tank, at a reading of 80 percent at normal temperatures reflects roughly 400 gallons of propane inside the tank. This is around how much can be stored.

Normal Temperatures
The propane industry manages the popular website Propane 101, that considers the propane reference point to be an exterior temperature of 60 degrees. For example, if the gauge reads 50% of capacity on a day when the temperature is close to 60 degrees, then a 500 gallon tank would contain around 250 gallons of propane. If the temperature that same day is much lower than 60 degrees, the gauge would read lower. Similarly, if the temperature is much higher than 60 degrees, the gauge will actually read higher since the gas expanded.

Effect of Contraction and Expansion
According to the information given by the propane industry web site, the amount of energy contained inside the tank does not actually change when the gas contracts or expands. The amount of propane itself has not changed, but just the density of the gas has changed.

Cold-Weather Delivery
If a homeowner orders 100 gallons of propane to be delivered, they would be given 424 lbs. of propane. If the homeowner has a 1000 gallon propane tank, they can expect the gauge to go up by 10% with the delivery of 100 gallons. These numbers would be correct if the temperatures were near 60 degrees at the time of delivery. If the delivery happened during colder weather conditions, these chillier temperatures will cause a smaller increase reading on the propane gauge.

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