Does Cold Affect a Propane Tank Level Gauge?
Like most other types of materials, propane is affected by cold temperatures. When the temperature goes down, the propane gas contracts. That reduced level of gas in the tank is reflected by the gauge which reflects the level on the propane tank. Usually, this comes into play whenever a homeowner checks the gauge during cold climate 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 fraction of the tank is full. Typically, tanks are not filled over 80% in order to allow the gas to expand on warm days. For example, a 500 gallon tank, at a reading of 80 percent at normal temperatures reflects approximately 400 gallons of propane in the tank. This is roughly the amount which could be stored.
Normal Temperatures
The propane industry manages the popular website Propane 101, that considers the propane baseline point to be an exterior temperature of 60 degrees. For instance, if the gauge reads 50 percent of capacity on a day when the temperature is near 60 degrees, then a 500 gallon tank would have around 250 gallons of propane. If the temperature that same day is much lower than 60 degrees, the gauge will read lower. In the same way, if the temperature is much higher than 60 degrees, the gauge would actually read higher due to the expansion of the gas.
Effect of Contraction and Expansion
According to the information provided by the propane industry website, the amount of energy contained in the tank does not really change as the gas expands or contracts. The amount of propane itself has not changed, but only the density of the gas has changed.
Cold-Weather Delivery
If a homeowner orders 100 gallons of propane to be delivered, they will be given 424 pounds 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 will be correct if the temperatures were close to 60 degrees at the time of delivery. If the delivery took place during colder weather, these chillier temperatures would cause a smaller increase reading on the propane gauge.