热电偶的热电动势有温接点和冷接点的温度区别。因此冷接点的温度变化后， 温接点的温度就算不变测温数据也会变化。因此通过其他温度传感器来检测冷接点（连接在热电偶上的端子） 的温度，通常进行电力补偿保持冷接点的温度为0℃。该动作就称为冷接点补偿。
利用冷接点补偿技术，伏特表的温度以及传感器探头反馈的温度可以被分别测量。
The temperature of the voltmeter, and hence that of the material being measured by the probe, can be measured separately using cold junction compensation techniques.
本文提出的改进方法能将国产规管冷端的热惯性降低到与热端接点相当的程度。
In this paper the improving method for the native thermocouple gauge tubes is given to reduce the thermal inertia of the cold junction to the same degree as the hot junction.
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