通常这种热-电转化方式是利用热电偶实现的。 热电偶由两层不同的金属构成，其中一层比另一层温度高时就在两层金属间产生电流。

The usual way to do this is with a thermocouple—a sandwich of two metals that produce a current when one side of the sandwich is hotter than the other.

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漏泄电流是没有用率的。经绝缘层漏泄的电流并不能热电偶驱动马达、发光或加热，但是依然会发生耗费。

The leakage current is of no use rate. The current does not leak the thermocouple insulation driving motor, lighting and heating, but it will still occur.

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讨论了探头内部的绝热层材料和加热电流的大小对测量的影响。

The effect on measurement of the isolator material and the magnitude of heating current inside the detecting head is discussed.

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