What temperature do heat sensing devices go off?

What temperature do heat sensing devices go off?

• A. 100 ± 5 °F
• B. 120 ± 2 °F
• C. 160 ± 3 °F
• D. 200 ± 5 °F

Answer: (C)

Heat sensing devices are set to trigger at a specific temperature to detect dangerous overheating while avoiding nuisance activations from normal heat. The chosen setpoint is 160°F, with a tolerance of ±3°F, so they activate around 157–163°F. This level is high enough that typical ambient temperatures won’t cause a false alarm, yet it detects meaningful heat buildup that could indicate a safety issue. A setpoint as low as 100°F or 120°F would trip too easily in hot climates or storage, causing unnecessary alarms, while a setpoint as high as 200°F could delay detection of hazardous heating.

Heat sensing devices are set to trigger at a specific temperature to detect dangerous overheating while avoiding nuisance activations from normal heat. The chosen setpoint is 160°F, with a tolerance of ±3°F, so they activate around 157–163°F. This level is high enough that typical ambient temperatures won’t cause a false alarm, yet it detects meaningful heat buildup that could indicate a safety issue. A setpoint as low as 100°F or 120°F would trip too easily in hot climates or storage, causing unnecessary alarms, while a setpoint as high as 200°F could delay detection of hazardous heating.