Fixed-temperature heat detectors are rated based on which criteria?

Fixed-temperature heat detectors are rated based on the normal ambient temperature range in which they are designed to operate effectively. This rating establishes the threshold at which the detector will respond to temperature increases, typically indicating the presence of a fire. The specified ambient temperature range ensures that the detector remains functional under normal conditions and reduces the likelihood of false alarms, which can occur if the detector is activated by ambient temperatures that exceed its operational limits.

In practical terms, knowing the normal ambient temperature range is critical for selecting and installing the appropriate heat detection system in various environments, whether they are residential, commercial, or industrial settings. This consideration ensures that the safety equipment will activate during a fire event without being triggered by higher temperatures that are not indicative of a fire hazard.