Regular smoke alarms can only do this one thing
Defending against fire is a crucial consideration, and smoke detectors perform a vital part in safeguarding your family. Despite that fact, smoke detectors have various drawbacks. For example, they are only able to react to smoke, not heat. In the event there is an emergency in your house, you may not be cautioned until the smoke reaches the smoke detector. Although there are some other telltale signals of fire -- including a sudden heat increase -- if you don’t have smoke, you will fail to get a sounding of your smoke detector.
Additionally, smoke detectors only sound the alarm if they encounter enough smoke. If a fire starts small, you may not be alerted until the situation is out of hand. Various smoke detectors utilize dual sensors, meaning they will detect smoke from both roaring flames and a more gradual burn. Then when they start beeping, it's up to the homeowner to contact first responders after safely leaving the property.