People in order to get information from the outside sensor, must resort to the sense organs. The people rely on their senses, in the study of natural phenomena and laws as well as production activities in their function is far from enough. To accommodate this situation, we need sensors. Therefore we can say, the sensor is an extension of human facial features, also known as electric facial features. The arrival of the new technological revolution, the world began to enter the information age. In the course of the use of information quality sensors, we must first solve is to obtain accurate and reliable information, and the sensor is to obtain the main ways and means of production in the field of natural and information. Integrated temperature sensors generally by temperature probe (thermocouple or RTD sensors) and two-wire solid state electronics unit. Using solid block form temperature probe sensor mounted directly in the terminal box classification, thus forming an integrated sensor. Integrated temperature sensor is generally divided into two kinds of thermal resistance and thermocouple types. RTD temperature sensor is a reference unit, R / V conversion unit, linear circuit, reverse polarity protection, current limiting protection, consisting of V / I converter unit and so on. After the RTD to amplify the signal conversion, and then by the linear relationship between temperature and nonlinear circuit resistance is compensated by the V / I converter circuit after the output of a constant current into 4 ~ 20mA signal linear relationship between the measured temperature. Sensor function, Xinfeng (certified), the sensor is provided by Xinxiang City, Xinfeng Sensing Technology Co. purification. Xinxiang City Xinfeng purification Sensing Technology Co., Ltd. (www.xfcgq.com) is an industry leader in Henan Xinxiang, sensors, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Xinfeng leadership with the staff warmly welcome all inquiries negotiations to create a better future Xinfeng.