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由专家的统计数据知,在信息测量系统的总价值中,测量变送器占40%,记录和显示装置占40%,数据处理装置及控制装置占20%。在各种形式的测量变送器中,就数量而言,广泛应用于各种工业领域的温度变送器约占15%。这一点并不奇怪,因为温度作为生产过程和科研中主要能源参数,约占被测参数的60%。而温度测量仪表绝大部分是热电偶和热电阻(约70%至80%)。在国际合作中,热电偶及热电阻主要参数的标准化具有重要的意义。
According to expert statistics, in the total value of the information measurement system, the measurement transmitter accounts for 40%, the recording and display device 40%, and the data processing device and the control device 20%. Among the various types of measurement transmitters, about 15% are temperature transmitters that are widely used in various industrial fields in terms of quantity. This is not surprising given the fact that temperature, as the main energy parameter in the production process and research, accounts for about 60% of the measured parameters. The vast majority of temperature measuring instruments are thermocouples and thermal resistance (about 70% to 80%). In international cooperation, the standardization of the main parameters of thermocouple and RTD is of great significance.