What feature is common among combination smoke detectors?

Combination smoke detectors incorporate multiple detection technologies, such as ionization and photoelectric sensors, which work together to improve the responsiveness and effectiveness in identifying smoke and fire. By utilizing different methods of smoke detection, these devices can quickly and accurately respond to a wider range of fire types. For instance, ionization sensors are particularly sensitive to fast-flaming fires, while photoelectric sensors are better at detecting smoldering fires. This multifaceted approach minimizes the likelihood of false alarms while maximizing the likelihood of an accurate detection, ensuring enhanced safety in environments where fire risk is a concern.

The mention of only detecting thermal changes, reliance on manual activation, or being less reliable than single detection systems highlights distinctions that combination smoke detectors do not conform to, reinforcing the unique capability they offer through their dual-detection nature.