What type of chamber do ionization detectors use along with a source of ionizing?

Ionization detectors utilize an ionization chamber as part of their functioning mechanism. This chamber contains a source of ionizing radiation, which helps create free ions (charged particles) when smoke or particles enter the chamber. When these particles disrupt the flow of ions between electrodes in the ionization chamber, the detector senses a reduction in current flow, triggering an alarm.

The ionization chamber's role is critical, as it allows the detector to respond quickly to fast-burning fires, which typically produce smaller combustion particles. This detection method is particularly effective for certain types of fires, highlighting the importance of the ionization chamber's function within the overall performance of the device. The presence of the ionization source is fundamental to how this technology operates, distinguishing it from other types of detectors that might rely on different mechanisms, such as light scattering in photoelectric detectors. Understanding this context emphasizes the specialized applications of ionization detectors in fire safety systems.