Ionisation smoke alarm

When smoke enters the smoke alarm chamber, the radioactive material reacts in such a way that it triggers the alarm. Generally, ionization alarms are more responsive to flaming fires. The term “flaming” fires refers to fires resulting from flammable liquids, wood or paper starting on fire.

This type of fire produces a lot of flames with a limited amount of smoke. Ionization smoke alarms are generally more responsive to flaming fires. How they work: Ionization-type smoke alarms have a small amount of radioactive material between two electrically charged plates, which ionizes the air and causes current to flow between the plates. An ionisation smoke alarm works by ionising the air between electrodes which are positively and negatively charge this creates a small current inside the chamber. These alarms use “ions,” or electrically charged particles, to help detect smoke in the air.

If, when the alarm goes off, there is no sign of smoke , heat or noise to indicate that there is a fire, you should get your family into a safe place, before you start investigating. Commercial security devices issue a signal to a fire alarm control panel as part of a fire alarm system, while household smoke detectors , also known as smoke alarms , generally issue a local audible or visual alarm from the detector itself or from a number of detectors if there are multiple smoke detectors interlinked. Free 2-day Shipping On Millions of Items.

Two charged plates inside of the ionization smoke detector create a flow of positively and negatively charged ions. The smoke alarm triggers when smoke breaks the constant flow of ions. Alpha particles are very heavy and cannot travel very far. They can be shielded by a layer as thin as a layer of dead skin cells.

This radioactive material ionizes the air in the sensing chamber, and makes it conductive, thus facilitating current flow between the two charged electrodes present within. Most smoke detectors can be classified as either photoelectric or ionization detectors, and need to be disposed of differently. Check the back of your smoke detector for a sticker bearing the radiation symbol to determine which type of detector it is. As a result, the air in the chamber becomes conductive permitting current to flow between two charged electrodes. In a fast moving flash fire, by the time a photo electric smoke detector goes off it may already be too late.

It is alright to have both type of smoke detector , but the ionization smoke detector has priority in my book. 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. We recommend ionisation smoke detectors for landings and office spaces.

Ionisation smoke alarms are very effective for detecting fast-flaming fire. Check Out Ionisation Smoke Detector on eBay. Fill Your Cart With Color Today! Kidde strongly recommends that both ionization and photoelectric smoke alarms be installed to help insure maximum detection of the various types of fire that can occur within the home.

When a smoke alarm goes off every time someone cooks bacon, people remove the battery or take down the smoke alarm. The First Alert Dual Sensor Smoke Alarm features photoelectric and ionization sensors for increased detection. The photoelectric sensor detects smoldering fires from objects like cigarettes burning on furniture or in trash cans, while the ionization sensor detects fast-flaming fires like erupting kitchen grease fires or combustibles. But, ionization detectors cannot detect large smoke particles as well. In many cases the black smoke you are describing consists of large particles and will NOT be detected by ionization detectors.

The Ei141RC Ionisation Smoke Alarm is fitted with a proprietary sensor to quickly sense high energy smoke particles from fast flaming fires. Powered by 230V AC with a 9V user replaceable Alkaline battery backup to ensure continuous operation (up to years) in the event of a power failure. Photoelectric sensing alarms may detect visible fire particles (associated with slow smouldering fires) sooner than ionization alarms.

Ionisation alarms are the more dated option out of the two, but that doesn’t mean they’re not relevant any more. As you learnt earlier, ionisation alarms rely on tiny particles of radiation to detect the presence of smoke. These alarms are very sensitive to smaller particles of smoke that are created from paper and wood fires. When the smoke alarm ionization chamber senses products of combustion, the horn will sound a loud (85db) tem- poral alarm until the sensing chamber is cleared of smoke particles.

Different alarms sensors work best at detecting different types of fire and so should be sited in appropriate rooms throughout a property. Free Shipping Available On Many Items. But Did You Check eBay?