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温度传感器的选型技巧_广州美达克公司
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温度传感器的选型技巧

发布时间:2021-02-02    浏览次数:1071

  最常见的过程传感器测量是温度值的测量。热电阻和热电偶传感器广泛用于工业温度测量,如何选择最适合的温度传感器?

  为了优化测量性能,并最大限度地减少长期维护费用,在选择温度传感器时,注意以下几点?


  1 测量温度范围在-40℃和850℃之间,请选择热电阻。

  2 对于低至-200℃的温度,请使用绕线热电阻。

  3 最佳做法是使用4 线制和A 类热电阻。

  4 确保传感器经过温度变化循环和“老化”处理,以确保长期稳定性。

  5 在部署低于0℃和高于600℃的热电阻时,您需要了解工艺条件以优化结构:温度范围、循环压力、流量、介质、振动和周围环境条件(化学品/ 大气)。

  6 如果需要最高精度时,使用传感器微调。

  7 如果使用长线路的3 线制热电阻,并且无法将其转换为4 线制热电阻,请将3 线热电阻替换为PT1000Ω 热电阻。

  8 如果监测温度高于850℃,请使用热电偶。

  9 如果使用热电偶,请使用优质热电偶和延长线。

  10 如果使用长热电偶延长线,请确保它具有噪声防护功能。

  11 用远程I/O 替代受污染的热电偶延长线。