Heat detectors include the following types EXCEPT

• A. fixed temperature
• B. rate of compensation
• C. deluge
• D. rate-of-rise

Answer: (C)

Heat detectors sense heat to trigger alarms and come in different sensing approaches. Fixed-temperature detectors activate when ambient heat reaches a set threshold, which is reliable in spaces where heat rises gradually to that point. Rate-of-rise detectors respond to a rapid increase in temperature, so they can alert quickly even if the final temperature hasn’t yet hit a fixed limit. Rate-compensation detectors adjust their sensitivity based on the surrounding temperature, helping prevent nuisance alarms in environments with wide temperature swings. Deluge, however, is a sprinkler system configuration where all sprinkler heads discharge water when activated, and it does not function as a heat detector. It belongs to the suppression system side, not the detection side, so it’s not a type of heat detector.