smoke...The reason that sometimes we cannot see smoke is because of the very tiny "particulates" that make up the smoke. A good smoke detector mwill sense smoke long before it can be seen. It is particles in air that are very very small that a smoke detector detects.
in a large room , eg living room , they will not detect , an airplane toilet , well that's another story
No.
If cigarette smoke gets built up enough in a room where the smoke detector is, it will set it off. One way to test a smoke detector is to blow smoke into it.
The isotope americium-241 as an alpha particles source for ionization.
nicotine
The first smoke detectors are based on optical principles - photoelectric detectors.
Yes, americium is used as ionizing source in smoke detectors.
yeah
from experience, too much heat,moist or dust affect the performance of smoke detectors and can easily activate the detector.
No
Smoke detectors detect smoke by not detecting it. They sense not the smoke, but the oxygen levels surrounding it. when the oxygen levels drop, or when smoke replaces the oxygen, the alarm goes off.
Smoke detectors are devices that detect smoke. They are used as warning devices in houses to warn people of fire.
Absolutely....It's a "smoke" detector.
Because the smoke detector uses power while trying to detect smoke.
Smoke detectors
Laser detectors detect laser speed devices and Radar detectors detect radar speed devices.Unfortunately it's usually too late when they detect Lasers.
Americium (241) is used in smoke detectors that use "ionizing radiation" to detect changes in the air. Other types of detectors use photo-electric sensors based upon a variety of photo-sensitive chemicals.
all of them! DONT SMOKE!
nicotine
One home smoke detector is not simply enough for any home. Often times, a fire is able to spread rapidly throughout a home because a smoke detector is unable to detect it. With multiple smoke detectors installed in a home, a home owner ensures that a fire will be sensed as soon as it is created. While multiple home smoke detectors may be quite expensive, they are a worthwhile investment. There are a few areas any home owner should be sure to install smoke detectors. These areas are a kitchen and any children's rooms. Bathrooms typically do not require smoke detectors.
Fire detectors do not detect the presence of fire, rather they detect heat or smoke depending on the type of detector. Smoke detectors have a light inside which shines on a receiver when smoke is present in the room it rises up and causes a break in the light therefore activating the alarm, this also makes it common for false activations in these types of alarms due to dust and dirt in the air. Heat detectors on the other hand have a small plate on the outside which is temperature sensitive. Heat detectors can be reactant to different levels of heat depending on what their use it. Usually they are made to activate at around 185 degrees F. When the ambient temperature reaches this (very low temperature for a fire) the metal plate will melt off its contact points therefore activating the alarm. These are just two types of detectors.