A temperature sensor is an electronic device that can sense temperature and convert it into a usable output signal. It is the core part of temperature measuring instruments, and there are many kinds. After entering the 21st century, temperature sensors are developing rapidly in the direction of high precision, multi-function, bus standardization, high reliability and safety, the development of virtual sensors and network sensors, and the development of monolithic temperature measurement systems.

The bus technology of temperature sensor has been standardized and can be used as a slave to communicate with the host through a dedicated bus interface. According to the measurement method can be divided into contact and non-contact two categories, according to the sensor material and electronic component characteristics are divided into thermal resistance and thermocouple two categories.

Temperature sensors are widely used in industry, medical treatment, environmental monitoring and other fields. For example, in industrial production, the temperature sensor can monitor the temperature of the equipment to ensure that the equipment is operating within the normal working range; In the medical field, temperature sensors can be used to monitor a patient's body temperature and detect abnormalities in time; In environmental monitoring, temperature sensors can be used to measure the temperature of the atmosphere and help researchers understand climate change.

In short, temperature sensors play an important role in modern science and technology, and its application and development will continue to promote scientific and technological progress.