How is the amount of refrigerant charge typically expressed for a recovery cylinder?

The amount of refrigerant charge is typically expressed as a percentage of capacity by weight for a recovery cylinder because it provides a clear and standardized measurement of how much refrigerant is contained relative to its total capability. This method ensures that technicians can accurately assess the amount of refrigerant present in the cylinder, which is critical for safety and efficiency when recovering and recycling refrigerants.

Expressing refrigerant charge as a percentage allows for easy comparison across different types and sizes of recovery cylinders, facilitating proper handling and storage. This approach is more relevant than potential options, such as measurement in degrees Fahrenheit, which pertains to temperature, or pounds per square inch, which relates to pressure and not quantity. Gallons would not apply since refrigerants are usually measured in weight rather than volume due to their varying densities and states.