Thermal sensors are devices that detect temperature changes in their environment. They can be found in many everyday items, such as thermostats in homes, smartphones, and industrial equipment. These sensors work by measuring the heat emitted by objects, allowing them to provide accurate temperature readings. There are different types of thermal sensors, including thermocouples and infrared sensors. Thermocouples measure temperature by producing a voltage based on the temperature difference between two metal junctions. In contrast, infrared sensors detect heat from a distance, making them useful for applications like night vision and temperature monitoring in various industries.