The device has a slim shape that is half the size of a standard smoke alarm, meaning the device will be less noticeable in any living space. It also has a photoelectric sensor that detects threats ...

The second type is a photo-electric smoke detector. Photoelectric smoke alarms contain a light source and a light detector. During normal operation, the light source does not point at the light ...

When something -- like smoke -- flows between these two plates, the electric charge is interrupted and the alarm is triggered. Photoelectric smoke detectors have a small light inside.

Generally, there are two primary types of smoke detectors: an ionization smoke detector and a photoelectric smoke detector.

Photoelectric smoke detectors use LED light. "When the smoke particles get into the chamber it breaks the light or deflects the light where it sets the sensor off," Kaufmann said. Meanwhile ...

Photoelectric smoke detectors use LED light. "When the smoke particles get into the chamber it breaks the light or deflects the light where it sets the sensor off," Kaufmann said. Meanwhile ...

When the number of particles takes too many of these ions away, the device will register that as smoke, and the alarm will sound. Photoelectric technology works by detecting light that is ...

There are two types of smoke detectors: Photoelectric and ionization. Photoelectric smoke detectors are less sensitive to steam, and tend to be a better choice for kitchens (and bathrooms with ...

The type of smoke alarm most commonly found in U.S. homes was the least likely to be working months after being installed, according to a research by the Harborview Injury Prevention and Research ...