A temperature sensor is a sensor that can sense temperature and convert it into a usable output signal. The temperature sensor is the core part of the temperature measuring instrument, and there are many kinds. According to the measurement method, it can be divided into two types: contact type and non-contact type. According to the characteristics of sensor materials and electronic components, it can be divided into thermal resistance and thermocouple.
Temperature sensors range from simple on/off thermostats that control domestic hot water systems to highly sensitive semiconductor types that can control complex process control furnace equipment. We remember in school science classes that the motion of molecules and atoms creates heat (kinetic energy). The greater the movement, the greater the heat generated
Temperature sensors measure the heat or even coldness produced by an object or system, allowing us to "sense" or detect any physical change in temperature, resulting in an analog or digital output. Depending on the application, there are many different types of temperature sensors, all of which have different characteristics. Temperature sensors include two basic physical types: Contact temperature sensor types - These types of temperature sensors require physical contact with the object being sensed and use conduction to monitor temperature changes. They can be used to detect solids, liquids or gases over a wide temperature range.