传感器有温度传感器和烟雾传感器，分别检测温度浓度和烟雾浓度。当测量的温度或烟雾浓度高于临界值时，单片机将发送信号给声光报警模块产生相应的声光报警。当测量的温度或烟雾浓度低于临界值时，状态指示灯保持常亮，说明火灾报警器在正常通电工作。(Sensors include temperature sensors and smoke sensors, which detect temperature concentration and smoke concentration respectively. When the measured temperature or smoke concentration is higher than the critical value, the singlechip will send the signal to the acoustooptic alarm module to produce the corresponding acoustooptic alarm. When the measured temperature or smoke concentration is lower than the critical value, the status indicator keeps on, indicating that the fire alarm is working normally.)