What type of smoke detection system is typical in cargo holds?

Air-sampling systems are a preferred choice for smoke detection in cargo holds due to their ability to continuously monitor air quality and detect smoke particles at an early stage. These systems draw in air from the monitored area through a network of pipes or tubing, analyzing it for the presence of smoke. This proactive approach allows for early detection of smoldering fires that may not produce noticeable smoke right away, providing essential time for response and action to prevent the escalation of a fire in enclosed cargo spaces.

In contrast, photoelectric and ionization detectors are typically more effective in environments where smoke can be momentarily detected due to changes in visibility, making them less ideal for the constantly changing conditions found in cargo holds. Manual smoke detectors rely on human intervention to identify smoke and would not provide the immediate detection capabilities needed in a cargo hold. Therefore, air-sampling systems stand out for their effectiveness in safeguarding cargo areas against fire risks.