4.7 Article

A Tutorial on Thermal Sensors in the 200th Anniversary of the Seebeck Effect

期刊

IEEE SENSORS JOURNAL
卷 21, 期 20, 页码 22122-22132

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2021.3105546

关键词

NTC; RTD; Seebeck effect; silicon sensor; smart sensor; temperature measurement; thermal sensor; thermistor; thermocouple

资金

  1. Spanish Ministry of Economy and Competitiveness
  2. European Regional Development Fund [TEC2016-76991-P]

向作者/读者索取更多资源

Two significant events in the physics of thermal sensors, the Seebeck effect and the study of the thermal dependence of pure metals, led to the development of thermocouples and RTDs respectively, which remain the main sensor technology for measuring extreme temperatures in industrial applications. This tutorial aims to explain the operating principles, characteristics, limitations, and new trends of the four main types of thermal sensors, comparing their advantages and disadvantages.
Two noteworthy events associated to the physics of thermal sensors were demonstrated and announced in 1821, exactly two hundred years ago. The first event was the Seebeck effect, which led to the development of thermocouples. The second was the study of the thermal dependence of the resistivity of pure metals, which led to the design of resistance temperature detectors (RTD). Sensors' science and technology has experienced remarkable advances in the last decades, but these two types of thermal sensors, whose physics were announced 200 years ago, are still nowadays the main sensor technology in many industrial applications that require the measurement of extreme temperatures. In such a 200th anniversary, this tutorial aims to explain the operating principle, subtypes, input-output characteristic, limitations, and new trends under research of the four main types of thermal sensor: RTDs, thermistors, silicon sensors, and thermocouples. These are also compared with each other, highlighting the main advantages and disadvantages of each sensor technology.

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