What is a photoelectric sensor smoke detector?
Photoelectric smoke alarms utilize a light source in a light-sensitive sensor. The light is continually positioned at a 90 degree angle. When the presence of smoke agitates and scatters the light in a photoelectric alarm’s chamber, the detector initiates its alarm sequence.
Why do my smoke detectors keep going off for no reason?
The most likely reason smoke detectors go off unexpectedly is that people aren’t changing the batteries in them often enough. That’s because smoke in the air will reduce the current. If your battery is dying, the current that’s flowing through your sensor also goes down. And so you can get a false positive.
What sensors do smoke detectors use?
Photoelectric smoke alarms Photoelectric alarms work using a photoelectric sensor and a light source. As smoke enters the chamber and crosses the path of the light beam, light is scattered by the smoke particles, aiming it toward the sensor, which in turn triggers the alarm.
How does a dual-sensor smoke alarm work?
Dual-sensor smoke detectors combine ionization and photoelectric technology to detect both flaming and smoldering fires, offering you the best protection and saving you the hassle of installing two separate smoke detectors. But you may still need to install carbon monoxide detectors, if appropriate for your home.
Is a photoelectric smoke detector better?
Ionization smoke alarms tend to respond faster to the smoke produced by flaming fires than photoelectric smoke alarms. Photoelectric smoke alarms tend to respond faster to the smoke produced by smoldering fires than ionization smoke alarms.
What is a dual sensor smoke detector?
Dual sensor smoke alarms use both ionization and photoelectric technologies in one alarm. The sensors work together to equip your home with comprehensive smoke and fire detection.
Why does my photoelectric smoke alarm keep going off?
Photoelectric smoke detectors have a small light inside. This means that anything that can float into your smoke detector, like vapor, steam, smoke and large puffs of dust, can trigger your smoke detector. This is why it may go off when you’re cooking, even if you’re not burning anything.
Which is better photoelectric or ionization?