Fire Prevention
The City of Dickson Fire Department is committed to the development and implementation of comprehensive proactive programs and procedures, which anticipate, recognize and assess fire risks and initiate actions to remove or reduce those fire risks.
Although fire prevention is a fundamental responsibility of every departmental employee, the fire prevention division is specifically charged with the responsibilities of planning and coordinating fire prevention programs to inform, educate and to assist citizens in becoming more fire prevention/fire reduction oriented.
The City of Dickson Fire Department places an emphasis on fire prevention programs and encourages citizen participation. This concept in enhanced by promoting citizens involvement through fire prevention programs.
Smoke Detectors: Ionization or Photoelectric?
Ionization detectors contain a tiny mass of Americium-241, which is a source of alpha radiation. The principle of using a small amount of radioactive material to ionize the air between two differently charged electrodes is to sense the presence of smoke particles. The radiation passes through an ionization chamber, which is in an air-filled space between two electrodes, and permits a small constant current to flow between the electrodes. Any smoke that enters the chamber absorbs the alpha particles which reduces the ionization and interrupts this flow of current, setting off the alarm.
Photoelectric detectors use the principle of utilizing a light source and a photosensitive sensor. When smoke particles enter the light path, some of the light is scattered by reflection and refraction onto the sensor. In other words, when smoke blocks the light beam, the reduction in light reaching the photocell sets off the alarm.
BOTH are effective and must pass the same tests to be certified as a listed Underwriters Laboratory (UL). The number and location of alarms is more important than the type.
Fire Safety Tips:
Contact Information
City of Dickson
600 East Walnut Street
Dickson, TN 37055
615-441-9508
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