The rate of false alarms is also reducing drastically due to the use of a photoelectric sensor. The sound produced during an emergency is unique and loud enough to make users and home occupants aware of impending danger. First Alert is a brand that seeks to reduce the occurrence of CO poisoning through the design of this detector. It Is a great model for your home, and it promises to keep both you and your family protected at all times. If you are looking to make your home safe, check out our guide to the best smart locks. The Kidde Smoke Alarm is another battery operated fire alarms system found in different parts of the world.