How Do Smoke Detectors Work?
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When it comes to the safety of our house and our loved ones, overlooking important things is not what any responsible person should do. In the same manner, you must be aware of how do smoke detectors work. Smoke detectors are also called fire alarm or smoke alarm is a device that is installed to trigger an alarm when it detects smoke.
Believe it or not, this small device installed on our ceilings that we often even ignore is solely responsible for saving the lives of thousands of people all over the world. Today, we will be leering a few significant things about smoke detectors and mainly on how they work.
Types of Smoke detectors
There are two major types of classification of different Smoke detectors: ionization and photoelectric.
Basics of Ionization Smoke Detectors
Ionization Smoke Detectors have been used as Smoke Detectors for several years and are in many ways similar to an ordinary safety alarm. This also works on the same circuit completion/break process as other window sensor burglar alarms and the only difference is there is no physical touch among both of the sensors.
Ionization smoke alarms originate before photoelectric alerts yet are viewed as viable at identifying flaring flames. Photoelectric smoke alarms are acceptable at distinguishing fires in their beginning periods.
How do they work
- Out of both ends – negative and positive – of the battery, wires are extended.
- These wires are further attached to different electrodes
- A circuit is completed through the electrodes but it is not done through physical contacts, instead, Americium-241 converts all the air molecules present in between the two electrodes into positive and negative ions.
- A complete circuit is created between the charged ions.
- In the event, if fire, through the slits or holes in the alarm, the smoke enters the alarm.
- Now the negative and positive ions find the smoke and not the plates.
- The circuit is thus broken and it leads the alarm ringing.
Basics of Photoelectric Smoke Detectors
Photoelectric smoke cautions, some of the time called optical smoke alerts, sound when a LED light inside the caution chamber is broken. In some cases, alluded to as seething alerts, photoelectric smoke alarms are fit for recognizing a fire right off the bat in its phase before it breaks into an undeniable fire.
How do they work
These work in a slightly different manner but the phenomena of circuit completion and breaking is also followed here. Here, the circuit is created through the LED’s light that is sent from one end to another which completes the circuit. In the event of a fire, smoke interrupts the light, and the circuit breaks causing the alarm to go off.
Source: http://www.smarttechtoday.com/how-do-smoke-detectors-work/54808/
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