Handbooks and Publications - Fire Prevention | Page 14

Fire Prevention Tips
attaches itself to the ions and reduces the flow of electric current, thus setting
off an alarm.
2. Photoelectric Detectors activate when the smoke is dense enough to deflect
a beam of light.
Smoke detectors also differ by power source. The batteries in battery powered
smoke detectors generally last one year. When the battery begins lose power and
needs to be replaced, the detector will begin to emit every minute or so and will
keep this up to a week or lo