Type K refers to a classification of thermocouples, which are devices used to measure temperature. Specifically, Type K thermocouples are made from two different metals: Chromel and Alumel. They are known for their wide temperature range, typically from -200°C to 1260°C (-328°F to 2300°F), making them suitable for various industrial applications. These thermocouples are popular due to their accuracy and reliability. Type K thermocouples are often used in laboratories, manufacturing processes, and even in food safety applications. Their versatility and cost-effectiveness make them a common choice for temperature measurement in many fields.