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What happens if your smoke detectors goes off but there's no smoke?
Wiki User
∙ 13y ago
This may because specs of dust can cause activation of the detector as it has the same effect as smoke. Spiders also can crawl into the sensors which does the same thing- same way with deodrant, paintfumes etc. It also may be because the smoke detector is just faulty.
Wiki User
∙ 12y ago
Wiki User
∙ 13y agoIf your smoke detector goes off, there is probably smoke, even though you might not see it. If, on the other hand, they chirp periodically, it means the battery is weak and needs to be replaced.
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How do smoke detectors detect smoke?
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.
Why do smoke detectors make a beeping noise when the electric goes off they are not hooked to any electric?
When the electricity goes out, a smoke detector may make a final beep as it's capacitor is discharged, as a warning. If the smoke detector has a battery backup, some detectors will beep just to let you know the power is off, and some other units will only beep when the power is off AND the battery is low. Usually there is a legend on the back of the unit that will tell you what the different beeps mean.
Where smoke detectors are used?
According to NFPA 72, the national fire code, smoke detectors shall be installed in each sleeping area, outside each sleeping area, and on each story of a home, i.e. top and bottom of stairways.
Why is Americium-241 used in smoke detectors?
Americium-241 is a radioactive isotope and used in smoke detectors to ionize the air (gives air molecules a charge). This allows a small current t flow between two contacts placed in the air chamber. When smoke particles enter the chamber, they attach themselves to the ionized molecules (by electrostatic attraction) effectively making them bigger and slowing the current. The detector then goes off when the current slows.
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The flame goes green and lots of smoke it let off
What is the principle of the working of the alarm?
There are a lot of fire alarm systems depending what kind of an alarm system you want.Fire alarm system with (smoke detectors,heat detectors,flame detectors almost the same with heat detectors,ionized smoke detectors and duct detectors) depending on the system of your needs.For you to understand it I will explain 2 of it.Smoke detectors have smoke sensors in side if the smoke is too much the alarm system starts to work,that means alarm works.How the alarm works the smoke detection system analysis the air which goes through it , if the sensor senses any increase of CO or CO2 then it starts the alarm. Flame or heat detector has a contact which is made of 2 different materials which has different specific heat, İf any heat reaches to this contact according t the different specific heated material contact bends towards the more specific heated material( you can do it with copper and iron at home if you fix them with a nonmetallic material and heat them even with a lighter you will see it with your eyes) than the alarm starts because the contact touches a metallic material to give the energy to the horn or bell.( for more specific information try Notifier or Honeywell
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