Smoke Detector Alarm System
Providing Everything You Need
Ionization
An Ionization Smoke detector generally contains two chambers. The first is used as a reference to compensate for changes in ambient temperature, humidity, or pressure. The second chamber contains a radioactive source, usually an alpha particle, which ionizes the air passing through the chamber where a current flows between two electrodes. When smoke enters the chamber the current flow decreases. This drop in current flow is used to initiate an alarm.
Light Scattering
The light-scattering smoke detector operates on the Tyndall effect; a photocell and a light source are separated from each other by a darkened chamber such that the light source does not fall on the photocell. The passage of smoke into the chamber causes the light from the source to be scattered and fall on the photocell. The photocell output is being used to initiate an alarm.
Light Obscuring
In the Light obscuring smoke detector, smoke interferes with a light beam between a light source and a photocell. The photocell measures the amount of light it receives. The variation in photocell output is being used to initiate an alarm.