potassium photocell

例句：

1. 1.The potassium photocell is used to detect light in the dark.
   钾光电管用于在黑暗中检测光线。
2. 2.The potassium photocell was invented by a scientist named Dr. Smith.
   钾光电管是由名叫史密斯的科学家发明的。
3. 3.The potassium photocell is commonly used in remote sensors for monitoring environmental conditions.
   钾光电管常用于远程传感器中，用于监测环境条件。