![Didn't know where to ask this…Is this a smoke detector or a carbon monoxide detector? It's on my ceiling. Thanks for your guidance! : r/Firefighting Didn't know where to ask this…Is this a smoke detector or a carbon monoxide detector? It's on my ceiling. Thanks for your guidance! : r/Firefighting](https://preview.redd.it/b31t0vzfm5i91.jpg?width=640&crop=smart&auto=webp&s=27f719a31e4f35b229291f7ced345cee21d0aafc)
Didn't know where to ask this…Is this a smoke detector or a carbon monoxide detector? It's on my ceiling. Thanks for your guidance! : r/Firefighting
![How Long Do Smoke and Carbon Monoxide Detectors Last? | Business and Home Security Solutions | Northeast OhioHow Long Do Smoke and Carbon Monoxide Detectors Last? How Long Do Smoke and Carbon Monoxide Detectors Last? | Business and Home Security Solutions | Northeast OhioHow Long Do Smoke and Carbon Monoxide Detectors Last?](https://protechsecurity.com/wp-content/uploads/2016/07/How-Long-Do-Smoke-and-Carbon-Monoxide-Detectors-Last.jpg)
How Long Do Smoke and Carbon Monoxide Detectors Last? | Business and Home Security Solutions | Northeast OhioHow Long Do Smoke and Carbon Monoxide Detectors Last?
![First Alert Wireless Interconnect Talking Battery Operated Smoke and Carbon Monoxide Alarm - SCO501CN-3ST (1039839) First Alert Wireless Interconnect Talking Battery Operated Smoke and Carbon Monoxide Alarm - SCO501CN-3ST (1039839)](https://www.firstalertstore.com/store/images/products/large_images/sco501cn-3st-wireless-interconect-talking-smoke-and-co-alarm-6.jpg)
First Alert Wireless Interconnect Talking Battery Operated Smoke and Carbon Monoxide Alarm - SCO501CN-3ST (1039839)
![What is this sensor on my ceiling? The round one next to the smoke detector? Also, are smoke detectors also carbon monoxide detectors? : r/whatisthisthing What is this sensor on my ceiling? The round one next to the smoke detector? Also, are smoke detectors also carbon monoxide detectors? : r/whatisthisthing](https://i.redd.it/5m6z8em1elq01.jpg)