Temperature is one of the seven fundamental base quantities. The basic unit of temperature in the International System of Units (SI) is the Kelvin. It has the symbol K. However, the most commonly used scales are the Celcius scale.

Temperature plays an important role in production of pharmaceutical products, food and beverages. Even a slight variance in the required temperature can affect the quality of the product and compromise its safety. Thus, temperature calibration is important for quality assurance.