A fire detection kit isn't what is once way. It was once common for a fire alarm to have a delay in finding an actual threat- something not so common with current technologies. This is a reason for consumers to throw out old models, and welcome the new with open arms. When dealing with family safety, embracing new technology with open arms is a must.
It's neat to take a smoke alarm apart and see how it works. If you do so, you might find that the kit you have is an optical fire detector. These common detectors use a beam of light to detect how many pollutants are in the air. Most fires will put out a fair amount of smoke, so setting the alarm off won't take more than a couple of minutes. Some deem this delay too long. Regardless, optical fire detection kits serve their part to alert to a disaster.

