photoelectric smoke detector

例句：

1. 1.The photoelectric smoke detector is an essential safety device in every household.
   光电烟雾探测器是每个家庭必备的安全设备。
2. 2.The new model of the photoelectric smoke detector has a longer detection range and better sensitivity.
   新型光电烟雾探测器的检测范围更长，灵敏度更好。
3. 3. In case of fire, the photoelectric smoke detector will immediately activate the alarm system.
   发生火灾时，光电烟雾探测器会立即启动报警系统。