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Classification of thermocouple indexing numbers
2011-9-3 17:05:05

    的分度号 主要 八种: T J E K N B S R ,其中 T J E K N 属于 一般 金属热电偶 , B S R则 属于 贵重 金属热电偶 There are eight types of graduation numbers for thermocouples : T , J , E , K , N , B , S , R, etc. Among them, T , J , E , K , N are general metal thermocouples , and B , S , R It belongs to precious metal thermocouple .
      分度号的特点是在所有 一般 金属热电偶中精确度等级最高,通常用来测量 300 ℃以下的温度 The characteristic of T graduation number is that it has the highest accuracy level among all general metal thermocouples , and is usually used to measure temperatures below 300 ;  

    分度号的特点是 不但 可用于氧化性气氛 ( 使用温度上限 750 ) 而且还 用于还原性气氛 ( 使用温度上限 950 ) ,并且耐 H2 CO 气体腐蚀,多用于炼油及化工; The characteristics of J index number are that it can be used not only in oxidizing atmosphere ( upper temperature limit 750 ) , but also in reducing atmosphere ( upper temperature limit 950 ) , and it is resistant to H2 and CO gas corrosion.
    中, 它的 热电动势最大, 也就是 灵敏度最高。 The characteristic of the E graduation number is that among the commonly used thermocouples , it has the largest thermoelectromotive force, that is, the highest sensitivity. 在氧化性 惰性气氛中连续使用, 它的 使用温度 0-800 Suitable for continuous use in oxidizing and inert atmospheres, its use temperature is 0-800 ;

     适合 在氧化性 惰性气氛中连续使用, 它的 短期 使用温度为 1200 长期使用温度1000 K index number is characterized by strong oxidation resistance, suitable for continuous use in oxidizing and inert atmosphere, its short-term use temperature is 1200 , long-term use temperature 1000 . 所有 热电偶 中使用最广泛 的一种 Is the most widely used of all thermocouples ;
     1300 下高温抗氧化能力强,热电动势的长期稳定性 及短期热循环的复现性好, 并且 耐核辐照 及耐低温性能也好,可以部分代替S 分度号 热电偶 The characteristics of the N index number are strong oxidation resistance at 1300 , good long-term stability of thermoelectromotive force and reproducibility of short-term thermal cycling, and good resistance to nuclear radiation and low temperature, which can be partially replaced. S indexing thermocouple     
     的特点是 在室温下热电动势极小, 所以 在测量时一般不用补偿导线。 The characteristic of the B graduation number is that the thermoelectromotive force is very small at room temperature, so the compensation lead is generally not needed during the measurement. 使用温度为 1800 长期使用温度为1600 Its short-term use temperature is 1800 , and its long-term use temperature is 1600 . 中性气氛中使用,也可 在真空条件下短期使用。 It can be used in oxidizing or neutral atmosphere, and can also be used for short periods under vacuum conditions.
    抗氧化性能强, 适合 在氧化性 惰性气氛中连续使用, 它的 短期 使用温度为 1600 长期使用温度 1400 The characteristics of the S graduation number are : strong oxidation resistance, suitable for continuous use in oxidizing and inert atmosphere, its short-term use temperature is 1600 , long-term use temperature is 1400 . 使用的 热电偶 中, S 分度号的精确度等级最高,通常 用作标准热电偶; Of all the thermocouples used, the S graduation number has the highest accuracy level, and is usually used as a standard thermocouple;
    S 分度号相比除热电动势大 15% 左右 ,其它性能 没有什么区别。 Compared with the R index number and the S index number, except for the fact that the thermal electromotive force is about 15% larger , there is no difference in other performance .