1.前言用热敏电阻作为温度敏感元件,主要优点有:电阻随温度的变化较大;体积小;可以在宽温区内的任何地方,规定环境温度下的名义电阻;成本低廉。。现在负温度系数(NTC)元件的稳定性和允差范围已有很大改善。但是用在测量系统时,电阻随温度呈很大的非线性,要求用专门的微处理机作为直接读数仪表。当用在窄温区要求较高灵敏度的地方。热 1. Introduction Thermistor as a temperature-sensitive components, the main advantages are: large resistance changes with temperature; small size; can be anywhere in the wide temperature range, the provisions of the nominal temperature at ambient temperature resistance; low cost. . Now the stability and tolerance range of negative temperature coefficient (NTC) components have been greatly improved. However, when used in a measurement system, the resistance is strongly non-linear with temperature and requires the use of a specialized microprocessor as a direct reading meter. When used in a narrow temperature zone requires a higher sensitivity of the place. heat