photoelectric pyrometer

例句：

1. 1.The photoelectric pyrometer is used to measure the temperature of the furnace.
   光电高温计用于测量炉温。
2. 2. The engineer used a photoelectric pyrometer to detect the temperature gradient in the material.
   工程师使用光电高温计检测材料的温度梯度。
3. 3.The photoelectric pyrometer was used to monitor the temperature changes during the manufacturing process.
   光电高温计被用来监测制造过程中的温度变化。