Temperature sensor chips are semiconductor dies or packages that have built-in temperature sensors. Temperature sensor chips are employed in controlling temperatures of various electric and electronic instruments. A temperature sensor chip infers temperature by featuring some changes in physical characteristic of electronic equipments. There are many different types of temperature sensors. Examples include thermocouples, resistance temperature devices (RTDs), infrared radiation sensors, bimetallic devices, liquid expansion devices, and change-of-state sensors. A temperature sensor chip protects equipment from high temperatures, which may damage the equipment. Thermoelectric thermometers, which use thermocouples are used in measuring temperatures. Resistance temperature detectors operate on the principle of changes in electrical resistance of pure metals. They are also characterized by a linear positive change in resistance with the temperature. Other temperature sensor chips are also commonly available.