Heat detectors that protect along a path and not a particular area are of what type?

Heat detectors that protect along a path and not a specific area are referred to as line-type detectors. This type of detection system works by evaluating the temperature along a continuous line, often utilizing a cable or a series of sensors that cover an extended area. This makes them particularly effective in environments where there may be fluctuating temperatures or where traditional spot-type detectors might not be adequately spaced or positioned to catch a potential fire.

In contrast, spot-type detectors focus on monitoring the temperature at specific points, which limits their effectiveness in larger or more complex spaces. Also, intelligent detectors incorporate advanced features for more precise detection and analysis but are not specifically designed for linear detection. Manual detectors rely on human intervention, which doesn't suit the automatic function provided by line-type heat detectors in protecting longer paths.