photoelectric nucleus counter

例句：

1. 1.This photoelectric nucleus counter is used to detect the presence of radiation in the environment.
   这个光电核计数器用来探测环境中的辐射。
2. 2. The device is designed to measure the amount of radiation entering the room.
   该设备旨在测量进入房间的辐射量。
3. 3.The photoelectric nucleus counter was used to monitor the radiation levels during the nuclear test.
   在核试验期间，使用光电核计数器监测辐射水平。