Fixed-temperature heat detectors activate when:

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Multiple Choice

Fixed-temperature heat detectors activate when:

Fixed-temperature heat detectors respond to a specific heat level. They contain a heat-sensitive element, such as a fusible link or a thermally activated switch, that changes state and triggers the alarm when the surrounding temperature reaches the device’s rated temperature. They will go off once that threshold is reached, regardless of how quickly the temperature rose. This is different from rate-of-rise detectors, which trigger on a rapid temperature increase, and from flame or gas detectors, which sense flames or gases rather than a fixed heat level. In practice, the detector activates at its designated temperature, such as a typical 135°F or 165°F rating, depending on the model.

Fixed-temperature heat detectors respond to a specific heat level. They contain a heat-sensitive element, such as a fusible link or a thermally activated switch, that changes state and triggers the alarm when the surrounding temperature reaches the device’s rated temperature. They will go off once that threshold is reached, regardless of how quickly the temperature rose. This is different from rate-of-rise detectors, which trigger on a rapid temperature increase, and from flame or gas detectors, which sense flames or gases rather than a fixed heat level. In practice, the detector activates at its designated temperature, such as a typical 135°F or 165°F rating, depending on the model.

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