Detectors are a necessity in any home. With the number of house fires that occur each year, it is vital to have a fire detection system. While there are different types of detectors on the market, they all serve the same purpose – to alert occupants of a fire so they can evacuate the premises.

There are two main types of detectors: ionization and photoelectric.

Ionization detectors
These detectors work by ionizing the air between two metal plates. This creates a small current that flows between the plates. The moment smoke enters the chamber, it disrupts the current flow and sets off the alarm.
Photoelectric detectors
These detectors work by shining a light into a sensing chamber. A photoelectric sensor is located within this chamber. When smoke enters there, it scatters the light beam. This triggers the sensor and sets off the alarm.

While ionization and photoelectric detectors both serve the same purpose, they each have their advantages and disadvantages. Ionization detectors are better at detecting smaller particles of smoke, such as those produced by flaming fires.

Photoelectric sensors are better at detecting larger particles of smoke, such as those produced by smoldering fires.

There are also combined ionization and photoelectric detectors on the market. These devices use both technologies to provide the best possible fire detection coverage.

Smoke alarms should be installed on every level of your home, including the basement. All sleeping areas should also have detectors outside them.

Be sure to test your detectors often to ensure they are working properly. Replace the batteries in battery-operated units at least once a year. If you have a hardwired unit, be sure to test the backup batteries regularly.

If you are unsure of the smoke detector to choose, speak with your local electrician.

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True Power Electric is an electrical company that focuses on the safety of your home. We offer a variety of services, including smoke detector installation.