photoelectron counter

例句：

1. 1.The photoelectron counter is used to measure the amount of light that enters the room.
   光电电子计数器用于测量进入房间的光量。
2. 2. The photoelectron counter was used to detect the presence of radiation in the area.
   光电电子计数器被用来检测该区域的辐射存在。
3. 3. The photoelectron counter was used to monitor the air quality in the city.
   光电电子计数器被用来监测该市的空气质量。