February 26, 2013, 03:47 PM
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Q and A
Q:
Discuss the differences and similarities between ionization and photoelectric smoke detection technologies (use illustrations to assist with the discussion). If you had to choose, which technology would you entrust to protect you and your family, and why?
A:
Photoelectric smoke alarms use a light beam source. There are two types of beam technologies. The first is the refractory or light-scattering method, where light is beamed without any interruption until smoke enters the chamber and scatters the light. Once this light is scattered it is reflected into a receiver and activates an alarm. The second method is the beam type photoelectric smoke detector. The beam type is a constant beam that when interrupted by smoke entering the chamber blocks the light between the source and receiver initiating an alarm. The ionization detector is based on a small amount of radioactive material located within the chamber between two ****l plates.
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