What is the function of smoke particles in a photoelectric detector?

In a photoelectric detector, smoke particles play a critical role by interfering with the light emitted from a light source. When smoke enters the sensing chamber of the detector, the particulate matter scatters the light beam. This scattering leads to a change in the amount of light that reaches the detector's sensor, indicating the presence of smoke.

This mechanism is pivotal to the function of photoelectric smoke detectors, as the increased levels of scattered light signify a potential fire hazard. The system is designed to sense this change in light intensity and subsequently trigger an alarm to warn of smoke presence. Understanding the function of smoke particles in this context is essential, as it directly relates to the operation of smoke detection systems, contributing to early fire detection in a variety of environments, including power plants.