1. 烟气报警：smoke activated device 烟动装置 | smoke alarm 烟气报警 | smoke and heat trap 聚烟和聚热天井

2. 烟气报警器：smoke accumulator 聚烟器 | smoke alarm 烟气报警器 | smoke box 锅炉烟箱

3. 烟感报警器：中央报警系统 Central Alarm System | 烟感报警器 Smoke Alarm | 温感报警器 Temperature Alarm

noun

1. an alarm that is tripped off by fire or smoke

Synonym: fire alarm