Certified Fire Protection Specialist (CFPS) Practice

The photoelectric light obscuration type smoke detector is specifically designed for detecting smoke in larger spaces such as auditoriums. This type of detector uses a light source and a sensor to detect smoke particles in the air. When smoke enters the sensing chamber, it scatters the light, reducing the intensity of light that reaches the sensor. The detection sensitivity can be adjusted to suit the specific environment, allowing it to effectively monitor for smoke in expansive areas where traditional smoke detectors may not perform as adequately.

In contrast, the ionization smoke detector is more effective in detecting fast-flaming fires and may not be optimal for larger spaces with significant air movement, which can disperse smoke particles. Heat detectors respond to temperature changes rather than smoke, making them unsuitable for early smoke detection in large areas. Ultrasonic detectors are not typically used for smoke detection; they rely on sound waves to detect movement, which is unrelated to smoke presence.