Does Cold Temperature Actually Affect a Propane Tank Level Gauge?
Propane is like nearly all other types of materials in that it is affected by cold temperatures. The propane gas contracts when the temperature does down. That reduced level of gas in the tank is reflected by the gauge that reflects the tank level. Often, this comes into play whenever a homeowner checks the gauge during cold conditions and sees the amount of the tank level before and after delivery. Depending on the weather conditions, the level on the tank may not rise as much as expected.
Propane Tank Level Gauge
The propane tank's gauge shows you what fraction of the tank is full. Usually, tanks are not filled over 80% so as to allow the gas to expand during hot days. For instance, a 500 gallon tank, at a reading of 80% at normal temperatures reflects around 400 gallons of propane inside the tank. This is about the amount that is able to be stored.
Normal Temperatures
The propane industry manages the popular web site Propane 101, which considers the propane reference point to be an exterior temperature of 60 degrees. Like 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 will have around 250 gallons of propane. If the temperature that same day is a lot lower than 60 degrees, the gauge would read lower. Similarly, if the temperature is a lot higher than 60 degrees, the gauge will actually read higher since the gas expanded.
Effect of Contraction and Expansion
Based on the information provided by the propane industry website, the amount of energy contained within the tank does not really change as the gas expands or contracts. The amount of propane itself has not changed, but just the density of the gas has changed.
Cold-Weather Delivery
The homeowner who orders 100 gallons of propane would receive approximately 424 pounds of propane. With the delivery of 100 gallons, the homeowner with a 1000 gallon propane tank could expect the guage to go up by 10%. 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 conditions, these chillier temperatures would cause a smaller increase reading on the propane gauge.