Which type of alarm is typically used for areas that contain high amounts of dust or airborne particles?

The photoelectric detector is typically used for areas that contain high amounts of dust or airborne particles because it relies on the scattering of light to detect smoke. In environments where dust may be prevalent, ionization detectors can be prone to false alarms since they operate by measuring the ionization of air particles. The scattering principle employed by photoelectric detectors makes them less susceptible to such interference, thus making them an ideal choice for dusty environments.

For combination detectors, while they utilize both ionization and photoelectric principles, they may not specifically address the challenges posed by environments with high levels of airborne particles. Heat detectors, on the other hand, respond to temperature changes rather than smoke or particles, rendering them unsuitable for smoke detection in dusty areas.