是测量物体冷热程度的工业自动化仪表。 The temperature measuring instrument is an industrial automation instrument that measures the cold and hot degree of an object.
年创造的； The earliest temperature measuring instrument was created by Italian Galileo in 1592 ;
年，德国的华伦海特于荷兰首次创立温标； In 1709 , Wallenhead of Germany first established the temperature scale in the Netherlands;
年，有人尝试利用金属棒受热膨胀的原理，制造温度计； In 1735 , some people tried to use the principle of thermal expansion of metal rods to make thermometers;
年，德国的塞贝克发现热电效应； In 1821 , Seebeck in Germany discovered the thermoelectric effect;
年，德国的西门子制造出第一支铂电阻温度计； In 1876 , Siemens of Germany manufactured the first platinum resistance thermometer;
的发展， 使 便携式数字温度计已逐渐得到应用。 With the development of electronic devices , portable digital thermometers have gradually been applied. 年代开始，由于红外技术和电子技术的发展，相继 出现了各种新型光敏或热敏检测元件的辐射温度计 。 Since the 1960s , due to the development of infrared technology and electronic technology, various new types of radiation thermometers with photosensitive or thermal detection elements have appeared successively . 配有各种样式的 热电偶 和 热电阻探头 ， 所以 使用比较方便灵活。 Because it is equipped with various types of thermocouples and RTD probes , it is more convenient and flexible to use. 。 The development of portable infrared radiation thermometers is also very rapid. The portable infrared radiation thermometers equipped with a microprocessor have a storage calculation function and can display multiple temperatures on a measured surface .
In addition, Hyundai has also developed a variety of other types of temperature measuring instruments, such as those consisting of transistor temperature measuring elements and optical fiber temperature measuring elements; thermal imaging cameras using thermal imaging scanning methods can directly display and photograph the temperature of the measured object The field thermogram can be used to check the surface temperature distribution of large furnaces, engines, etc., which is very useful for energy saving; there are also temperature measuring instruments that use lasers to measure the temperature distribution of objects.