Optical Smoke Detectors

Optical smoke detectors, also known as photoelectric smoke detectors, are devices used to detect smoke as an indicator of fire. They work by using a light source and a light sensor.

Here’s how they function:

  • Light Source and Sensor: Inside the detector, there’s a light source that emits a beam of light. This light is usually invisible to the human eye.
  • Detection Chamber: The light beam is directed into a detection chamber. Under normal conditions, the light does not hit the sensor directly.
  • Smoke Detection: When smoke enters the chamber, it scatters the light beam. This scattered light then hits the sensor.
  • Alarm Activation: Once the sensor detects the scattered light, it triggers the alarm, alerting occupants to the presence of smoke.

Optical smoke detectors are particularly effective at detecting smouldering fires, which produce a lot of smoke before bursting into flames. They are commonly used in homes and businesses for early fire detection.

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