Photoelectric smoke detector

« Back to Glossary Index

A photoelectric smoke detector is a device used in the commercial and/or residential burglar alarm industry to detect smoke and fire. It works by using a light source and a photosensitive receiver. When smoke enters the detector, it scatters the light, which triggers the receiver to sound an alarm. Photoelectric smoke detectors are known for their ability to detect smoldering fires, which produce more smoke than flames. They are also less likely to trigger false alarms from cooking or steam.

In addition to their effectiveness in detecting fires, photoelectric smoke detectors are also easy to install and maintain. They can be wired into a building’s electrical system or powered by batteries. Regular testing and cleaning can ensure that they are functioning properly.

CGSmith, a business and residential security system installation and monitoring company based out of the Milwaukee WI area, understands the importance of photoelectric smoke detectors in keeping homes and businesses safe. They offer installation and maintenance services for a variety of security systems, including smoke detectors. By visiting the Contact Us page on their website, customers can learn more about their services and schedule a consultation with one of their experts. CGSmith is committed to providing top-quality security solutions to their clients, and photoelectric smoke detectors are just one of the many tools they use to achieve that goal.


1. How does a photoelectric smoke detector work?

A photoelectric smoke detector works by using a light source and a sensor to detect smoke particles in the air. When smoke enters the detector, it scatters the light, which triggers the sensor to sound the alarm.

2. Are photoelectric smoke detectors better than ionization smoke detectors?

Photoelectric smoke detectors are generally considered better than ionization smoke detectors because they are more effective at detecting smoldering fires, which are responsible for the majority of fire deaths. Ionization smoke detectors are better at detecting fast-burning fires.

3. Do photoelectric smoke detectors require maintenance?

Yes, photoelectric smoke detectors require regular maintenance to ensure they are functioning properly. This includes testing the alarm regularly, replacing the batteries as needed, and cleaning the detector to remove any dust or debris that could interfere with its operation.

« Back to Glossary Index