Which type of sensor is used in a smoke detector?
Which type of sensor is used in a smoke detector?
Smoke detector types A photoelectric detector senses sudden scattering of light when smoke enters the detector chamber, triggering the alarm. Photoelectric smoke detectors respond an average of 15 to 50 minutes faster to fire in its early, smouldering stage, before it breaks into flame, than ionisation alarms.
Can I smoke in a room with a smoke detector?
The short answer is yes, it can. Since cigarette smoke no longer swirls in the hallways, today’s detectors are designed with greater sensitivity so they can sense a developing fire as fast as possible. However, while it’s possible to set off a fire alarm by smoking, reports of such incidents are rare.
What is the minimum distance between smoke detectors?
Smoke detectors do not have a listed spacing. They have a recommended spacing of 30 feet between detectors. However, smoke detectors can be installed up to 41 feet apart in corridors up to 10 feet wide. The main fact to remember is that all points on the ceiling must be within 21 feet of the detector.
What is the best smoke alarm?
One of the best smoke alarms in terms of performance, reliability, and value is the First Alert Smoke Detector. This hardwired alarm uses both photoelectric and ionization to detect smoke, giving you peace of mind that your family will be alerted if a fire ever breaks out.
How often do you need to replace smoke detectors?
Smoke alarms should be replaced every 10 years. CO detectors should be replaced every 5 to 7 years. With a combination unit, you are either replacing the smoke alarm too soon, or relying on a CO detector that is past its expiration date.
How often do smoke alarms need to be replaced?
How often should a smoke detector be replaced. Smoke detectors should be replaced every 10 years from the date of manufacturing (the date should be indicated on the device). Dust and debris can settle inside the device and the sensors may not work as well after the 10-year period.
How old is my smoke detector?
You can tell how old your smoke detector is because they have a date of manufacture printed on them. If they don’t have a date, it means they are more than 10 years old, from a period when the dates weren’t required, and you should definitely replace them.