Which temperature scale is most commonly used in industrial applications?

The Celsius scale is the most commonly used temperature scale in industrial applications due to its alignment with the metric system, which is widely adopted in scientific and engineering contexts. In many processes, temperature measurements need to be consistent and easily convertible with other metric units, making Celsius convenient for international operations. For instance, the freezing point of water is at 0°C and the boiling point at 100°C under standard conditions, which provides a clear and practical reference for various industrial processes.

While other scales like Kelvin are important in scientific calculations, especially in thermodynamics (where absolute zero is critical), Celsius remains the go-to standard for most industrial settings. Fahrenheit is primarily used in the United States for weather reporting but is less relevant in the industrial realm. Rankine, although used in specific engineering calculations particularly in the United States, is generally not applied as commonly in everyday industrial practices where Celsius is favored for its simplicity and direct relation to commonly encountered temperature phases.