Humans rely on sensory organs to get information from the outside world, while machines rely on sensors to study natural phenomena, patterns and birth dates. In order to the general situation, the sensor also dividends different varieties, can say that the sensor is the five senses of the machine, but also the extension of the five senses of human beings.

Sensors can complete information transmission, disposal, storage, display, record, control and other multiple requests, with miniaturization, digitalization, intelligence and other functions, is the first step to complete automation. It is used in all aspects of homework day.

Temperature sensor: refers to the sensor that can sense the temperature and convert it into a usable output signal. Temperature sensor is the central part of the temperature measurement surface, there are many varieties. According to the measurement method can be divided into touch type and non-touch type two categories, according to the characteristics of sensor materials and electronic components into thermal resistance and thermocouple two categories.

Temperature sensor is the earliest developed and most widely used sensor. The percentage of the market for temperature sensors greatly exceeds that of other sensors. From the beginning of the 17th century, people began to use temperature stop measurement. With the support of semiconductor technology, semiconductor thermocouple sensor, PN junction temperature sensor and integrated temperature sensor have been developed in this century.

Pressure sensors, a sensor is the most commonly used in the industry theory, its widely used in various industrial control environment, touch the water conservancy and hydropower, railway transportation, intelligent buildings, production control, aerospace, military industry, petrochemical, oil, electric power, ships, machine tools, pipe, etc. A lot of work, here are simple introduced some commonly used sensor principle and its application. And medical pressure sensors.