目前中学使用的J0301型热敏温度计具有结构简单,价格便宜等优点.但不足之处是需要用户在使用之前自己点画度盘、而多数中学由于缺少点画度盘所需要的热源和标准温度计.因此虽配备了这种温度计但只好搁置不用. 我们针对该热敏温度计的缺点,进行了改型.新型机采用线性热敏电阻、线性放大器与线性刻度盘,仍与大型演示电表配合使用.生产单位可采用标准工艺定型 At present, J0301 thermometer used in middle school has the advantages of simple structure, low price, etc. However, the disadvantage is that users need to draw their own graduation disc before use, while most secondary schools lack the heat source and standard thermometer for drawing the graduated disc Although equipped with this thermometer but had shelved do not have to address the shortcomings of the thermistor, the new machine uses a linear thermistor, linear amplifier and linear scale, still with a large demonstration meter with the use of production units Standard process can be used stereotypes